Safety devices for gas pressure regulating stations and installations — Gas safety shut-off devices for inlet press...
BRITISH STANDARD
Safety devices for gas pressure regulating stations and installations — Gas safety shut-off devices for inlet pressures up to 100 bar
ICS 23.060.40
12&23 25 bar shall be accompanied by a material inspection certificate at least type 3.1 in accordance with EN 10204."
4.2.1.3
Fasteners, integral process and sensing lines and connectors
Fasteners, integral process and sensing lines and connectors can be made of:
materials complying with the restrictions given in Table 5 and with a national or an international established standard;
or materials given in Annex J.
4.2.1.4
!Material inspection documents" of fasteners and compression fittings
!This sub-clause specifies the different types of inspection documents supplied to the purchaser, in accordance with the requirements of the order, for the delivery of components used for SSDs." Bolts, screws, studs, nuts and compression fittings used in the pressure containing parts of the SSDs shall bear the marking in accordance with the relevant standard and they shall be accompanied by !a material test report" type 2.2 in accordance with EN 10204.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Table 5 — Materials Restrictions Material Group
Safety shut-off device Properties Amin a
PSmax
(PS · DN b)max
DN bmax
%
bar
bar · mm
mm
Pressure containing parts and inner metallic partition walls Rolled and forged steel c
16
100
-
-
Cast steel c
15
100
-
-
Spheroidal graphite cast iron d
7
20
1 500
1000
15
50
5 000
300
Malleable cast iron
6
20
1 000
100
Copper-zinc wrought alloys
15
100
-
25
Copper-tin and copper-zinc cast alloys
5
20
1 000
100
15
100
-
25
4
20
-
50
7
50
-
50
100
-
25
1,5
10
250
150
4
20
1 600
1 000
Aluminium wrought alloys
Aluminium cast alloys
Integral process and sensing lines Copper
-
25
-
-
Steel
-
100
-
-
-
-
-
9
50
-
-
12
100
-
-
Connectors Steel
8 Fasteners
Steel for bolts, screw, studs
NOTE For castings the specified mechanical characteristics are those measured on machined test piece prepared from separately cast test samples in accordance with the relevant standard for the selected materials. a
A = percentage elongation after fracture (according to the applicable standard relevant to the chosen material).
b
For the bodies of pilots or fixtures this term shall refer to their inlet connections.
!c Bending rupture energy measured in accordance with EN 10045-1 shall be not less than 27 J as average of three test pieces with minimum individual of 20 J at minimum operating temperature (-10 °C or -20 °C)." d
Bending rupture energy measured in accordance with EN 10045-1 shall be not less than 12 J as an average of three test pieces and no less than 9 J as a minimum individual value at a temperature of -20 °C for PS > 25 bar when used in SSD class 2.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
4.2.1.5
Manufacturing
The manufacturer shall state the selected material standards in the relevant documentation (see 8.1.1). !Fabrication welds in all pressure containing parts shall be made using qualified welding procedures in accordance with applicable EN ISO 15607, EN ISO 15609-1, EN ISO 15610, EN ISO 15611, EN ISO 15612, EN ISO 15613, EN ISO 15614-1 and EN ISO 15614-2 and by qualified welders or welding operators according to applicable EN ISO 9606-2, EN ISO 9606-3, EN ISO 9606-4, EN 287-1 and EN 1418." In addition, for fabrication welds to make bodies, blind flanges, bonnets and actuator casings:
only full penetration welds shall be used;
weld fabrication and heat-treatment shall comply with EN 13445-4.
These additional requirements are not applicable to seal welding. For all pressure containing parts and inner metallic partition walls, the manufacturer shall identify the material throughout the production from receipt up to the final routine tests by markings or labelling. 4.2.1.6
Non destructive testing (NDT)
Steel bodies shall be non-destructively tested in accordance with Tables 6 and 7.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Table 6 — Non destructive testing ! Type of non destructive testing Volumetric
Sections to be examined and/or extent of coverage
Radiographic Steel castings
Ultrasonic
EN 12516-1:2005, 10.3.2
Surface Visual
EN 12516-1:2005, 10.3.3
Forgings, bars, plates and tubular products
EN 12516-1:2005, 10.4 and 10.5
Not applicable
Fabrication welds
According to E and F in Table 7
Accessible surfaces
EN 125161:2005, Annex B
EN 125161:2005, Annex E
MSS SP 55:1985 a and EN 970 b
NDT procedures and acceptance criteria for fabrication welds, including their repairs
EN 125161:2005, 10.6 and Annex B
EN 125161:2005, 10.6 and Annex E
EN 970 b
General requirements
Liquid penetrant
Accessible surfaces
NDT procedures and acceptance criteria for castings, forgings and their fusion weld repairs
According to B in Table 7
EN 125161:2005, Annex C
EN 125161:2005, Annex D
Examinations shall be performed on the material after heat treatment required by the material or welding, either before or after the finish machining at the option of the manufacturer.
Accessible surfaces in case of surface examination include exterior and interior surfaces but not threads, drilled or threaded holes etc.
a
This document is applicable only to steel castings.
b
This document is applicable only to fusion weld repairs.
NOTE
Magnetic particle
EN 12516-1 is equivalent to ASME B16.34:1996 mentioned in the previous edition of this document.
"
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Table 7 — Minimum inspection sample pmax
Castings
100
DN < 100
≥ 100 < 150
≥ 150 < 200
A+B
A+C
A+C
50 ≤ pmax < 100
Full penetration fabrication welds Partial penetration fabrication welds
100 50 ≤ pmax < 100
≥ 250 A+D
A+B
< 50 Forgings, bars, plates and tubular products
≥ 200 < 250
A /
C
C
D
/
> 16
A+F
5 < pmax ≤ 16
A+E
> 16
A+B
A
is the visual examination of 100 % of the production batch.
B
is the magnetic particle or liquid penetrant examination of 100 % of the production batch.
C
is the volumetric examination of 10 % of the production batch, selected on random basis.
D
is the volumetric examination of 20 % of the production batch, selected on random basis.
E is the volumetric examination of 10 % of the circumferential, corner and nozzle seams of the production batch, selected on random basis, and 100 % of the longitudinal seams of the production batch. F is the volumetric examination of 20 % of the circumferential, corner and nozzle seams of the production batch, selected on random basis, and 100 % of the longitudinal seams of the production batch. NOTE A production batch consists of castings or forgings from the same melt and having the same heat treatment or welds made by the same process or welder or welding operator. An inspection sample is a percentage of the production batch.
In the case of random inspection, if a casting, forging or weld does not conform to the acceptance criteria a further inspection sample of twice the original sample size from the same production batch shall be examined. If one of these castings, forgings, or welds fails, the examination shall be extended to all castings, forgings, or welds in the production batch. Any casting, forging, or weld that does not conform to the acceptance criteria shall be repaired according to an applicable procedure and then re-examined. The NDTs shall be carried out by qualified personnel in accordance EN 473 or other equivalent standards. 4.2.2
Requirements for elastomers (including vulcanized rubber)
Elastomers shall comply with suitable requirements (at the time of writing this subject is under study in WI 00235009 – prEN 13787 rev.). 4.2.3
Requirements for non metallic materials different from those in 4.2.2
Functional non metallic parts in contact with the gas shall be chemically resistant to the fuel gases listed in Clause 1 and to the additive substances normally used for odorization and conditioning of gases. Furthermore, these materials shall be resistant to the permissible impurities in the gas.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
!The resistance to liquids of functional non metallic parts shall meet the requirements in Table 8." After immersion for one week at 23 °C ± 2 °C in test liquid A (100 % n-pentane) as specified in ISO 1817, followed by drying in an oven at 70 °C ± 2 °C, the change in mass when determined by the method specified in 5.4 of EN ISO 175:2000 shall comply the requirements in Table 8. Table 8 – Requirements for non metallic materials different from those in 4.2.2 Property
Determination of changes in mass
Requirements
Maximum change in mass after one week at 23 °C ± 2 °C
EN ISO 175
±5%
Maximum change in mass after drying in an oven at 70 °C ± 2 °C
EN ISO 175
+5 % /-2 %
4.3 Strength of housings !deleted text" 4.3.1
!Body and its inner metallic partition walls"
The limit pressure pl (determined or calculated in accordance with 7.3), maximum allowable pressure PS and maximum inlet pressure pumax shall be as follows: pl ≥ Sb × PS ≥ Sb × pumax 4.3.2
Flanges
!The maximum allowable operating pressure for flanges in accordance to the relevant parts of ISO 7005 shall not be less than maximum allowable pressure PS (some parts of these documents can be replaced by the equivalent documents when they are available). Flanges shall be in accordance with EN 1092-1, EN 1092-2, EN 1092-3, EN 1092-4, EN 1759-1, EN 1759-3 and EN 1759-4." 4.3.3 4.3.3.1
!Other pressure containing parts General
The other pressure containing parts are classified in the following three groups: I)
parts that are subjected to inlet pressure under normal operating conditions and that are designed to withstand a maximum allowable pressure equal to PS, e.g. specific pressure containing parts of SSD, controller as per Figure 2;
II) parts that are connected to the body as a result of a failure conditions (e.g. casing of controller as per Figure 1) and that are either designed to withstand a maximum allowable pressure equal to PS or that are designed to withstand a specific maximum allowable pressure of PSD which is lower than PS and with additional protective measures; III) parts that can never be subjected to inlet pressure even in the case of failure conditions and that are designed to withstand a maximum allowable pressure PS or a specific maximum allowable pressure PSD which is lower than PS, e.g. controller as per scheme 1a of Figure 1).
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Pressure containing parts group I) For this group the limit pressure pl , the maximum allowable pressure PS and the maximum inlet pressure pumax shall comply with the following requirements: pI ≥ S × PS ≥ S × pmax Pressure containing parts group II) For this group the limit pressure pl, the maximum allowable pressure PS and the maximum inlet pressure pumax , shall comply with the following requirements: pI ≥ S × PS ≥ S × pumax As alternative solution, pressure containing parts of the group II) may be protected against exceeding their allowable limits of pressure by an appropriate design (specific safety accessory e.g. a relief valve, vent tapping, bleeding through sensing / process lines and/or limiting of the flowing gas by appropriate clearances between movable and fixed parts). In this case, it is necessary to consider also the working conditions with the downstream isolation valve of the installation in the closed position. In this case, the limit pressure pl of the concerned pressure containing parts, the specific maximum allowable pressure PSD and the maximum pressure pmax reached in the event of a failure, shall comply with the following requirements: pl ≥ S × PSD ≥ S × pmax The set point of the specific safety accessory shall be adjusted in such a way to limit the pressure to the relevant specific maximum allowable pressure PSD. Appropriate instructions on this subject shall be included in the operating and maintenance manual. Pressure containing parts group III) Where the parts are designed to withstand PS, the limit pressure pl, the maximum allowable pressure PS and the maximum inlet pressure pumax, shall comply with the following requirements: Pl ≥ S × PS ≥ S × pumax Where the parts are designed to withstand PSD, the limit pressure pl, the specific maximum allowable pressure PSD and the maximum inlet pressure pmax reached in the event of a failure, shall comply with the following requirements: pl ≥ S × PSD ≥ S × pmax In above last case with specific maximum allowable pressure PSD, the markings shall include also the maximum component operating pressure pmax and the specific maximum allowable pressure PSD as detailed in Clause 9. 4.3.3.2 Integral strength safety shut-off devices SSDs classified as integral strength SSDs shall include only pressure containing parts designed to withstand the maximum allowable pressure PS. For these types of SSDs the marking shall include the symbol “IS“. On request, this symbol shall be marked also on the body.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
4.3.3.3 Differential strength safety shut-off devices SSDs classified as differential strength SSDs include some pressure containing parts designed to withstand the specific maximum allowable pressure PSD where PSD < PS. For these type of SSDs the marking shall include the symbol “DS“. On request, this symbol shall be marked also on the body." 4.3.4
Inner metallic partition walls
!Where a chamber in the SSD is separated into individual pressure containing chambers by a metallic partition wall, the partition wall shall be designed taking into account the maximum differential pressure." The following requirement shall be complied with: pl ≥ S × ∆pmax 4.3.5
Minimum values of safety factor
The values listed in Table 9 shall be used to limit the stress in the walls of pressure containing parts and inner metallic partition walls at the maximum allowable pressure. The values of the safety factors applicable to diaphragms when they have both the function of pressure containing parts and inner metallic partition wall are those detailed in 7.3.2. Table 9 — Minimum values of safety factor Group of materials
34
Minimum value of safety factor
S
For parts of the body stressed by forces from pipelines only Sb
Rolled and forged steel
1,7
2,13
Cast steel
2,0
2,5
Spheroidal graphite cast iron and malleable cast iron
2,5
3,13
Copper-zinc wrought alloys aluminium wrought alloys
and
2,0
2,5
Copper-tin cast alloys and copperzinc cast alloys
2,5
3,13
Aluminium cast alloys Amin 4 %
2,5
3,13
Aluminium cast alloys Amin 1,5 %
3,2
4,0
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
4.3.6
Welded joint coefficient
!For welded joints both in pressure containing parts and into inner metallic partition walls, the joint coefficient shall not exceed the following values:
for welded joints subject to 100 % NDT: 1;
for welded joints subject to random NDT: 0,85;
for welded joints not subjected to NDT other than visual inspection: 0,7."
5
Functional requirements
5.1 General 5.1.1
Shutting-off and opening
The shutting-off of the gas flow shall be automatic and shall not be interruptible until the closed position of the closing member has been reached. !The opening of SSDs shall only be possible by manual operation." 5.1.2
Mounting position
SSDs within the scope of this document shall function in any mounting position specified by the manufacturer, ± 5°. 5.1.3
Bypass
If an internal bypass is fitted for the purpose of pressure equalization it shall close safely and automatically before or during tripping. 5.1.4
Ice formation
If requested in the order specification, the SSD shall be type-tested in accordance with the customer requirements, for example in accordance with Annex A. 5.1.5
Fail-close conditions
!SSDs of class A shall fail closed in the following cases:
damage to the pressure detector element (e.g. diaphragm);
failure of the external power supply unless a backup system is provided.
NOTE
5.1.6
Failure of a bellows or pressure detector element piston-type, need not be considered."
Pressure drop
When the body of the SSD is not a full bore ball valve type (see ISO 5752), the pressure drop in relation to the operating conditions shall be specified by the manufacturer if required in the order specification. For SSDs with straight full bore bodies or similar, the pressure drop calculated for the pipework shall include the face-to-face dimension of the valve.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
For SSDs incorporated in a regulator the calculation of pressure drop may be carried out by the reciprocal of the formulae (3) or (5) in EN 334:2005. For stand-alone SSDs the calculation of pressure drop may be carried out by the formula as detailed in Annex C. 5.1.7
!Surveillance and maintenance
SSDs of Class A and B require suitable surveillance checks and maintenance, particularly Class B, to guard against premature and/or unnoticed failure of the pressure detector element. In the case of SSDs of Class B the manufacturer shall draw the attention of the user to the residual risks associated with the pressure detector element. The notice concerning the residual risks shall be included in the documentation (8.2.3)."
5.2 Shell strength, external tightness and internal sealing 5.2.1
Shell strength
Pressure containing parts subjected to the test described in 7.5 shall show no visible leakage and no permanent deformations exceeding 0,2 % or 0,1 mm, whichever is greater. The percentage of the permanent deformation is calculated as:
100 ×
l − l0 l
where l0 is the distance between any two points on a pressure containing part before applying the test pressure; l 5.2.2
is the distance between the same points after releasing the test pressure. External tightness
The pressure containing parts and all connecting joints shall be leak-proof when tested in accordance with 7.7. 5.2.3
Internal sealing
For slam shut device: the requirements of internal sealing are met when:
bubble tight for a time of 5 s;
leakage is no higher than the value given in Table 14. These values are to be used both in the test at ambient temperature and the tests at limit temperatures.
Recognised alternative detection methods may be used for checking the internal leakage (e.g. electronic device). For such methods the equivalence of the above requirements shall be demonstrated. The accumulated internal leakage from internal walls, the closing member in its closed position, any bypass and connecting joints shall not exceed the values shown in Table 14 when tested in accordance with 7.8.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
For cut-off devices: the leakage class in accordance with EN 1349 shall be established as specified in the order specification.
5.3 Accuracy group The trip pressure deviation for an SSD shall conform to an accuracy group of Table 10. Table 10 — Specified accuracy groups Accuracy group
Permissible deviation
AG 1
± 1%a
AG 2,5
± 2,5 % a
AG 5
± 5%a
AG 10
± 10 % a
AG 20
± 20 % b
AG 30
± 30 % b
a
Or 1 mbar, whichever is greater.
b
For set values ≤ 200 mbar only.
An SSD type can conform to different accuracy groups as a function of the set range !Wdo and Wdu" or of the inlet operating pressure range !bpu". At the lower limit temperature the permissible deviation for the declared accuracy group may move to a less stringent group as detailed in 7.9.3.
5.4 Response time The response time ta shall be:
for slam shut devices: ≤ 2 s;
for cut-off devices ≤ 0,08 DN s for DN ≤ 250 and ≤ 0,06 DN s for DN > 250.
For cut-off devices lower response times may be specified in the order specification. Adjustable response time may be requested in the order specification.
5.5 Relatching difference and unlatching 5.5.1
Relatching difference
The relatching difference ∆pw shall be measured in accordance with !7.11". 5.5.2
Unlatching under mechanical impact
When subjected to the test in accordance with 7.11 no unlatching of the SSD shall occur.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
5.6 Closing force When tested in accordance with 7.12, the closing force shall ensure closing of the closing member by a sufficient safety factor under all operating conditions. In the case of closing springs, appropriate measures against breakage shall be considered as those detailed in 4.1.9. The closing forces shall correspond to the following: open position:
Fs ≥ 5 × R ± f × S ± f × W + f × D closed position:
Fs ≥ 2,5 × R ± f × S ± f × W where FS is the closing force; R
is the friction force, (non static friction);
S
is the unbalanced load from static pressure;
W
is the weight of the moving parts;
D
is the dynamic force on the closing member from the mass flowing through the SSD;
f = 1,1 where the force opposes the closing of the closing member; f = 0,9 where the force assists the closing of the closing member. The addition (+) is applied when the force opposes the closing of the closing member and the subtraction (-) when the force assists the closing of the closing member. The dynamic force (D) is considered zero if it assists the closing of the closing member. When there is any torque developed in moving parts by the flowing mass it shall be considered when calculating FS. Both formulae shall be verified at the most critical operating conditions in the most critical mounting position.
5.7 Endurance and accelerated ageing When tested in accordance with 7.13 the SSD shall meet the tightness requirements in accordance with 5.2.2 and 5.2.3 and the set pressure deviations shall remain within its AG.
5.8 Strength of the trip mechanism, valve seat and closing member against the dynamic impact of flowing gas This requirement shall be applied to SSDs where there is a dynamic impact on the closing member in its fully open position. After testing in accordance with 7.15 the SSD shall meet the internal sealing requirements.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
5.9 Flow coefficient When the SSD is incorporated in a regulator the flow coefficients in accordance EN 334 are used. For stand-alone SSDs, a flow coefficient in accordance with 7.9.5 may be used.
5.10 Final visual inspection In the type test specifically after the tests 7.5 up to and including 7.15 and those in 7.4 and in Annex A when applicable, the SSD shall show no undue wear, !bending", corrosion, damage or other defects which may affect its long term performance.
6
Testing
6.1 General Clause 6 provides guidance on the procedure that may be used when a certification of compliance with the requirements of this document is required. The sub-clauses in 6 !deleted text" may be applied also to the conformity assessment to the PED.
6.2 Tests Table 11 gives an overview of the different types of tests and correlates them to the requirements and test methods detailed in Clauses 4, 5 and 7. The requirements in this chapter shall be followed when compliance evaluation with this document is requested. Where compliance evaluation to this document is finalized with positive result, the SSD can bear as marking the number of this document.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Table 11 — Summary of tests and requirements Test schedule T
M
Requirements S
Clause
Test method Title
Clause
Constructional tests A
A
A
4.1
Dimensional check and visual inspection
7.1
A
A
A
4.2
Materials check
7.2
A
4.3
Verification of the strength of pressure containing parts and inner metallic partition walls
7.3
A
4.1.10
Verification of the strength of parts transmitting actuating forces
7.4
Functional tests A
A
A
5.2.1
Shell and inner metallic partition walls strength test
7.5
A
A
A
5.2.2
External tightness test
7.7
A
A
A
5.2.3
Internal sealing test
7.8
A
Aa
Aa
5.3
Test at ambient temperature
7.9.2
A
5.3
Test at the limit temperatures -20 °C or -10 °C or 60 °C
7.9.3
A
5.3
Verification of the upper limit of highest set range
7.9.4
5.4
Response time
7.10
A
5.5
Relatching difference and unlatching
7.11
A
5.6
Closing force
7.12
A
5.7
Endurance and accelerated ageing
7.13
A
5.8
Verification of the strength of the trip mechanism, valve seat and closing member against dynamic impact b
7.15
A
5.9
Determination of the flow coefficient c
7.9.5
A
5.10
Final visual inspection after type test
7.16.1
Final visual inspection after routine tests and production surveillance
7.16.2
A
A
A
A
7.16.2
A = Applicable S = Production surveillance M = Routine tests T = Type test !a Test: generally as 7.9.2 but only at ambient temperature, 6 consecutive operations for test S and 2 consecutive operations for test M. The set range or the specific set range or the trip pressure in accordance to order specifications or at the manufacturer’s discretion when not otherwise specified."
b
This test shall be carried out on SSDs only if there is a dynamic impact on the closure member in its fully open position.
c
For SSDs with straight full bore bodies or similar, this test is not applicable.
6.3 Type test Those tests (see Table 11) carried out to establish the performance classification of the SSD or the series of SSDs. These include verification of the documentation listed in 8.1.1.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
When changes are made to the design of an SSD or a series of SSDs in such a manner as to affect the above tests, the manufacturer shall inform the parties involved, if any, in the compliance evaluation to this document.
6.4 Selection of test samples The number and types of SSD to be subjected to type test shall be selected according to the following requirements:
at least one SSD for each type of fixture and controller;
at least two sizes (nominal diameter DN);
at least one SSD for each accuracy group (AG) !deleted text".
If the same SSD can be used as a stand-alone or combined device it will be tested only once.
6.5 Routine tests Those tests (see Table 11) carried out on each SSD by the manufacturer during the production process. The tests verify that materials, dimensions, external conditions and accuracy groups remain in compliance with the results of the type test. Routine tests for integrated pressure regulators, if any, are detailed in EN 334.
6.6 Production surveillance Those tests and verifications (see Table 11) carried out in order to confirm continuing compliance with this document. The tests and verifications include additionally:
verification of routine tests records;
verification of drawings and material certificates.
7
Test and verification methods
7.1 Dimensional check and visual inspection The actions to assess:
the dimensional compliance of pressure containing parts with the applicable drawings;
the compliance of the SSD construction with the relevant assembly drawing and the construction requirements of this document.
7.2 Materials check The actions to assess the compliance of the materials used or prescribed with the requirements in 4.2. The verification of the materials used shall be carried out by the review of the material certificates. The verification of the materials prescribed shall be carried out by the review of the list of parts.
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
7.3 Verification of the strength of pressure containing parts and inner metallic partition walls 7.3.1
Strength calculation method
Verification is made by proving the compliance of the actual safety factors with those specified in 4.3.5 and the compliance of minimum allowable thicknesses shown in drawings with values specified in the strength calculations. Strength calculation !shall" be carried out according to EN 12516-2 and !EN 12516-4". 7.3.2
Experimental design method
Verification is made by proving the compliance of the actual safety factors with those specified in 4.3.5 taking into account the minimum allowable thicknesses shown on drawings and the minimum proof stress (yielding) for selected material. Actual safety factors are obtained through one of the following two ways:
hydrostatic pressure test until the first sign of yielding or failure becomes apparent in any component and verification that the limit pressure pl at which the first sign of yielding or failure becomes apparent is:
sry
pl ≥ PS × Sb ×
pl ≥ PS × S ×
smin sry
smin
×
×
Rp 0, 2
r
Rp 0, 2
min
Rp 0, 2
r
Rp 0, 2
for the body only;
for other components;
min
hydrostatic pressure test and verification that permanent deformations do not exceed the values stated in 5.2.1, however up to the following test pressures:
0,9 × PS × S b ×
Rp 0, 2 srw r × sw Rp 0, 2
for the body only;
min
0,9 × PS × S ×
Rp 0, 2 srw r × sw Rp 0, 2
for other components;
min
where
42
smin
is the minimum design wall thickness at the point where the first sign of yielding occurs in mm;
sry
is the measured wall thickness of test sample at the point where the first sign of yielding occurs in mm;
|Rp0,2 |min
is the minimum proof stress (yielding) for selected material according to relevant document in N/mm2;
|Rp0,2 |r
is the measured proof stress (yielding) for the material of the test sample according to relevant document in N/mm2;
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
sw
is the minimum design wall thickness for the weakest point in mm;
srw
is the measured wall thickness of test sample for the weakest point in mm.
The weakest point can be located by technical evaluation or via measurements (strain gauge etc.). The test is carried out in such a manner that deformations of the test sample in all directions are possible. There shall be no additional stresses due to bending, torque or tension. Forces from fastening systems shall be similar to those experienced under normal installation conditions. SSD bodies and pressure containing parts manufactured from different materials may be pressure tested separately. !Special high strength clamping bolts, nuts and gaskets (between individual pressure containing parts) may be used for hydrostatic testing." !For the component with the specific maximum allowable pressure PSD, in the above two formulae (not in those referred to body) replace the symbol “PS” with the symbol “PSD”." Diaphragms used as pressure containing parts in chambers subjected, or that can be subjected to a maximum differential pressure ∆pmax shall withstand a test pressure (in bar) of at least:
0,3 bar
if ∆pmax < 0,15 bar;
2 ∆pmax
if 0,15 bar ≤ ∆pmax < 5 bar;
1,5 ∆pmax but at least 10 bar
if ∆pmax ≥ 5 bar.
7.4 Verification of the strength of parts transmitting actuating forces Verification is made by proving the compliance of the actual safety factors with those specified in 4.1.10 and the compliance of dimensions shown on drawings with values specified in the strength calculations. Alternatively, verification may be made by an actual test.
7.5 Shell and inner metallic partition walls strength test Pressure containing parts, those that become pressure containing parts in case of a diaphragm or differential pressure seal failure and inner metallic partition walls shall be pressure tested. The test is carried out with water at ambient temperature at a pressure according to the values of Table 12 for three minutes. The criteria of 5.2.1 shall be met. The test is carried out in such a manner that deformations of the SSD in all directions are possible. There shall be no additional stresses due to bending, torque or tension. Forces from fastening systems shall be similar to those experienced under normal installation conditions at least during the type test. The test may be carried out without trim (i.e. the internal parts that are in flowing contact with the gases). The test may also be carried out with air or nitrogen, if the necessary safety measures are taken. Chambers separated by diaphragms shall be pressurized on both sides of the diaphragm at equal pressure.
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Table 12 — Pressure values for the shell strength test ! Chambers with the maximum allowable pressure PS
Chambers with specific maximum allowable pressure PSD
Test pressures 1,5 PS but at least PS + 2 bar
1,5 PSD but at least PSD + 2 bar
"
7.6 Alternative shell and inner metallic walls strength test Hydrostatic pressure tests as detailed in 7.5 can be replaced by other tests (e.g. pneumatic test) whose reliability shall be demonstrated. For tests other than the hydrostatic pressure test, additional safety measures, when appropriate, such as non-destructive tests or other methods of equivalent validity, shall be applied before those tests are carried out.
7.7 External tightness test 7.7.1
External tightness test of metallic housing
The assembled SSD and its fixtures are pneumatically tested to assess compliance with the requirements of 5.2.2. The test is carried out at ambient temperature with air or gas at the test pressure specified in Table 13. This test shall be carried out on a strength-tested SSD for at least:
15 min in the type test,
1 min in the routine tests and in the production surveillance.
The result of test is satisfactory if one of the following conditions is met:
bubble tight for a time of 5 s. This test may be carried out by covering the SSD with a foaming liquid, by immersing the SSD into a tank of water or by other equivalent methods;
external leakage not higher than the values listed in Table 14 only for cut-off devices.
The test pressures in Table 13 do not apply to any chambers bounded on at least one side by a diaphragm even if they are subjected to gas pressure under normal operating conditions. The test is carried out in such a manner that deformations of the SSD in all directions are possible. There shall be no additional stresses due to bending, torque or tension. Forces from fastening systems shall be similar to those experienced under normal installation conditions at least during the type test. Recognized alternative detection methods may be used for checking leakage (e.g. electronic device). For such methods the equivalence to the above requirements shall be demonstrated.
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Table 13 — Pressure values in the external tightness test ! Chambers with the maximum allowable pressure PS Chamber of controller
Chambers with specific maximum allowable pressure PSD
Other chambers Test pressures
1,2 pdso,max, but at least 0,5 PS
1,1 PS
1,1 PSD
" Table 14 — Maximum external and internal leakage rates Nominal size DN
Air leakage rate in cm3/h a external
internal b
25
40
15
40 to 80
60
25
100 to 150
100
40
200 to 250
150
60
300 to 350
200
100
400
400
300
a
At normal conditions.
b
In case of specific requirement in the order specification, see Annex I (applicable only to cut-off devices).
7.7.2
External tightness test of chambers bounded on at least one side by a diaphragm
Such chambers shall be pneumatically tested at a test pressure (in bar) equal to at least:
0,2 bar
if ∆pmax < 0,15 bar;
1,33 ∆pmax
if 0,15 bar ≤ ∆pmax < 5 bar;
1,1 ∆pmax but at least 6,65 bar
if ∆pmax ≥ 5 bar.
Test method and acceptance criteria in accordance with 7.7.1.
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7.8 Internal sealing test !deleted text" The internal sealing test is carried out at ambient temperature with two different test pressures of 0,1 bar and 1,1 PS upstream of the closing member and atmospheric pressure downstream of the assembled SSD and its fixtures to assess compliance with the requirements of 5.2.3. This test may be carried out before or after the functional tests specified in 7.9.2. SSDs built into regulators are tested with the regulator in the open position. The test method to measure the leakage class, where applicable, shall be in accordance with EN 1349. !deleted text"
7.9 Accuracy group 7.9.1
General conditions
The tests may be carried out with either air or gas. Wherever necessary measured flow rates are converted into values that are related to air at normal conditions. Pressure measurement devices shall have an accuracy of at least 0,25 AG. Tests shall be carried out at ambient temperature. SSDs shall be tested in the mounting position specified by the manufacturer. The external sensing and loading pressure lines shall be located on the pipeline according to the prescription of the manufacturer. !deleted text" The test is carried out in a test rig (equivalent to !Figure 5") under the following operating conditions:
the body of the SSD is pressurized from both ends;
the controller of the SSD is pressurized with a variable pressure representing the monitored pressure. The rate of the pressure change is kept constant;
the whole unit is installed in a chamber with a controlled temperature between –10 °C (or –20 °C) and +60 °C for tests at limit temperatures.
The accuracy groups for overpressure protection and underpressure protection, if applicable, are determined separately. 7.9.2
Test at ambient temperature
Test method: for each specified accuracy group (AG) and relevant:
maximum inlet pressure pemax,
set range;
a) ensure that the body is at atmospheric pressure; b) adjust the trip pressure to the lower limit of the set range;
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! c) with the SSD in the open position, starting from approximately 80 % of the selected trip pressure, increase the monitored pressure with a pressure change rate not greater than 1,5 % of the selected trip pressure per second until closure of the SSD occurs;" d) repeat test c) five times; the set value is the arithmetic mean of the six actual values; the routine tests are repeated once only and the set value is the arithmetic mean of the two actual values; e) without further adjustment repeat the tests !c)" to d) with the body pressurized to the maximum inlet pressure (pumax); f)
the set point is the arithmetic mean of the two set values calculated in d) and e).
The test method for underpressure protection is similar to that specified above; the starting pressure for operation c) shall be 120 % of the selected trip pressure. The test requirements are met if all the values of the trip pressure in c), d) and e) are within:
AG ps × 1 ± 100 7.9.3
Test at the limit temperatures –20 °C or –10 °C and 60 °C
The tests are carried out in a temperature controlled chamber, at the lowest limits of (-20 ± 2) °C or (-10 ± 2) °C with a dry test medium (dew point ≤ -25 °C) !and at" (60 ± 2) °C. There shall be no adjustment of the trip pressure between the test at ambient temperature (7.9.2) and this test. Test method: a) pressurize the body of SSD in the open position and maintain the inlet pressure at 0,1 bar; b) adjust the temperature of the test chamber to the limit value; the test may commence when the temperature becomes uniform in all parts of the SSD with a tolerance of ± 2 °C; c) starting from approximately 80 % of the selected trip pressure, increase the monitored pressure at a rate of change not greater than 1,5 % of the selected trip pressure per second until closure of the SSD occurs; d) verify the internal sealing; e) the test method for underpressure protection is similar to that specified above; the starting pressure for operations c) shall be 120 % of the selected trip pressure. The test requirements are met if the internal sealing complies with the requirement in 5.2.3 and the value of the trip pressure in c) corresponds to the specified accuracy group. For the tests at –20 °C and at –10 °C only, the results may correspond to accuracy groups at ambient temperature multiplied by 2 except when, at ambient temperature, AG = 30. In this case the AG = 30 may be multiplied by 1,5. EXAMPLE
At ambient temperature AG 5 may change to AG 10 both at –20 °C and at –10 °C. At ambient temperature AG 30 may change to AG 45 both at –20 °C and at –10 °C.
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7.9.4
!Verification of the upper limit of the highest set range for overpressure monitoring"
Test method: a) ensure that the body is at atmospheric pressure; b) adjust the trip pressure to the upper limit of the highest set range; c) starting from approximately 80 % of the selected trip pressure increase the monitored pressure at a rate of change not greater than 1,5 % of the selected trip pressure per second until closure of the SSD occurs; d) repeat the test c) five times; e) calculate the arithmetic mean of the six actual values. The test requirements are met if the set value calculated in e) corresponds to the specified accuracy group. 7.9.5
Determination of flow coefficient
For a stand-alone SSD, a specific determination shall be carried out by testing the SSD with its closing member in fully open position, in a test rig in accordance with 7.7.7.4.7 of EN 334:2005. The following flow coefficient formulae may be used:
those in 6.2 of EN 334:2005, or
Cv coefficient as detailed below.
The Cv coefficient shall be determined for at least three different operating conditions with: ! C vi =
Q pu + pb 404,72 × ∆p × d × (t u + 273)
"
where Cvi is the flow coefficient for a test; Q
is the flow rate in m3/h at normal conditions;
∆p is the pressure drop across the SSD in mbar; pu is the inlet pressure in bar; tu
is the inlet temperature in °C;
pb is the absolute ambient atmospheric pressure in bar; d
is the relative density (air = 1, non dimensional value).
The Cv flow coefficient shall be assumed to be equal to the arithmetic mean of the three values. For Cv values a tolerance of ± 10 % against the declared value is permitted.
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!
" Key 1
SSD (in the scheme including a vessel upstream inside the cabinet)
2 3
Microswitch or similar device Recorder
4 5
Pressure transducer Environmental cabinet
6 7
Pressure vessel (in the scheme to be included in the cabinet) Leakage control valve
8 9
Isolating or needle valve Pressure regulator
10 Pressure indicator A Regulator controls the operating pressure of the SSD B Regulator adjusts monitored pressure !deleted text"
!Figure 5" — Test rig configuration for SSDs
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7.10 Response time !The response time for the trip pressure for over-pressure monitoring is determined at ambient temperature." The test starts with the closing member in the open position and with the SSD body at the maximum operating pressure. If the response time is longer for lower operating pressures the test will also be carried out at the minimum operating pressure. The monitored pressure is set at approx. 50 % of the set value. The monitor pressure is raised so that the trip pressure plus the maximum value of deviation is reached within 0,2 s (see !Figure 6"). The response time shall be determined to an accuracy of < 0,1 s. The response time is measured from when the monitored pressure reaches the highest limit value of the AG until the closing member has reached its closed position. The test comprises three consecutive operations and the response time is the arithmetic mean of the three measured values. The response time shall be stated in the type and production surveillance test report (with a special note if it is longer than 2 s), together with a description of the test conditions. !
" Key 1 2
Set value of the trip pressure Monitored pressure
3
AG
4
!t ≤ 0,2 s"
5
Response time ta
6
Closing characteristic
7 8
Open Closed
!Figure 6" — Measurement of the response time
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7.11 Relatching difference and unlatching 7.11.1 !Trip pressure for over-pressure monitoring" !The tests are carried out at ambient temperature with the closing member in the closed position, the monitored pressure at the highest trip pressure for over-pressure monitoring and with the SSD body at maximum operating pressure." The test starts with the monitored pressure in excess of the set value established in 7.9.4. The pressure is slowly lowered to the minimum value within the accuracy group, at which point it shall not be possible to relatch the closing member. Following this operation the monitored pressure is adjusted to the relatching difference value specified by the manufacturer. In this condition the device is latched and for devices DN ≤ 150 impact tests are carried out in accordance with !Figure 7" and Table 15 (or an equivalent arrangement). The impact loads in accordance with Table 15, or other loads with equivalent energies, are applied ten times directly to the outlet connection of the SSD by a drop hammer. The test requirements are met if no unlatching of the shut-off device occurs. The established relatching difference and the test conditions shall be stated in the test report. 7.11.2 Lower trip pressure The test for lower trip pressure is carried out in a similar way to 7.11.1.
Table 15 — Impact loads M (kg)
M (kg)
DN
PS ≤ 16
PS > 16
DN ≤ 50
0,2
0,3
65 ≤ DN ≤ 150
0,4
0,6
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Dimensions in millimetres
Key 1 2
Rigid clamping Test sample
3 4 5
Impact absorbing plate Rigid clamping Drop hammer (M)
!Figure 7" — Impact test rig
7.12 Closing force The data specified by the manufacturer for all relevant loads are checked by testing the SSD under operating conditions at ambient temperature. The test shall be carried out at the most unfavourable operating conditions, to be specified by the manufacturer. For this purpose the closing force FS for both the initial and final position of the closing member are determined as the arithmetic mean of 3 tests respectively, similarly the friction (R) is determined. The friction to be considered is that measured with motion (not static friction). The resulting loads (S) and (W) are calculated. The dynamic force (D) shall be considered only if in the fully open position it opposes the closing of the closing member. It may be measured either at the most unfavourable conditions or calculated by:
D = Cr × A × ρ ul × cul2 where Cr
is the dynamic factor (see D.2);
A
is the area of closing member in contact with the fluid (see D.1), in m2;
ρul is the density of the fluid with flow Qul (see 7.15) in kg/m3; cul is the velocity of gas at the inlet flange under volumetric flow rate Qul (see 7.15) in m/s. The test is passed if the requirements of 5.6 are met. For SSDs with variable mounting positions (see 5.1.2) the most unfavourable case shall be considered.
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7.13 Endurance and accelerated ageing Test method: a) fit the SSD with the overpressure setting element for the lowest specific set range and set to its mid point; b) subject the SSD to a total of 100 closure cycles (which may include closure cycles previously carried out); c) subject the SSD to the internal sealing test in accordance with 7.8 and to accuracy group test to 7.9.2; d) subject the SSD to further 50 closure cycles with the temperature reduced to the lower limit value; e) after allowing the temperature to return to ambient temperature subject the SSD to internal sealing and accuracy group tests in accordance with 7.8 and 7.9.2 respectively.
7.14 Resistance to gas of non metallic parts This test should be carried out only on the non metallic parts having an influence on the operation of the device. Verification is carried out in accordance with the requirement in 4.2.3.
7.15 Verification of the strength of the trip mechanism, valve seat and closing member against dynamic impact of flowing gas This test shall only be carried out on SSDs where there is a dynamic impact on the closing member in its fully open position. The test shall be carried out with the closing member in its fully open position, on a test rig in accordance with 7.7.7.4.7 of EN 334:2005. Flow conditions shall be such that the product calculated below is a maximum:
(Q
2 ul
× ρul
)
max
where Qul is the volumetric flow rate at the inlet flange at operating conditions (not at normal conditions), in m3/h;
ρul is the density of the fluid with Qul at inlet flange in kg/m3. Both the values of Qul and that of ρul should be chosen from those declared by the manufacturer. The test operating conditions shall be such that:
(Q
2 ut
)
(
× ρ ut = 1,5 Qul2 × ρ ul
)
max
where Qut is the volumetric flow rate at the inlet flange at test conditions (not at normal conditions), in m3/h;
ρut is the density of the test fluid with Qut at the inlet flange in kg/m3. Test method:
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
a) fit the SSD with the overpressure setting element for the lowest specific set range and set to its mid point; b) adjust the inlet pressure so that the density at the inlet is equal to ρut; c) increase the volumetric flow to Qut; d) close the SSD by increasing the controlled pressure in the controller; e) decrease the controlled pressure in the controller and re-open the SSD; f)
close the SSD by increasing the controlled pressure in the controller;
g) repeat the operations e) and f) twice; h) check internal sealing and the accuracy group in accordance with 7.8 and 7.9.2 respectively; i)
repeat the test as above with the SSD equipped with an under pressure monitoring unit.
These tests should be carried out where technically possible and economically justified. Where this is not the case, alternative test methods may be used, e.g. those detailed in Annex D.
7.16 Final visual inspection 7.16.1 After type test Upon completion of the tests in 7.5 up to and including 7.15 and the tests in 7.4 and in Annex A when applicable, the test samples shall be dismantled and inspected to verify the compliance with the requirements detailed in 5.10. 7.16.2 After routine tests and production surveillance Upon completion of the routine tests the SSD shall be externally inspected. There shall be no visible evidence of damages and the markings shall comply with the applicable instructions.
8
Documentation
8.1 Documentation related to type test 8.1.1
Documentation required prior to type test
The following documentation shall be available at the time of carrying out the type test: a) photographs and/or leaflets; b) scheme and pertinent functional description; c) technical data for the series of SSDs and a list of performance data to be confirmed; d) assembly drawing of SSDs; e) overall dimensional drawing; f)
nameplate drawing;
g) strength calculation or test report for all pressure containing parts;
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h) parts list with material description for all components; i)
manufacturing drawings of all pressure containing and critical internal components;
j)
installation, operation and maintenance manual.
8.1.2
Test report
On completion of the type test a report according to EN ISO/IEC 17025 shall be provided detailing the results of the tests carried out. If alternative methods are used, they shall be described in detail in an appropriate section of the test report.
8.2 Documentation for the customer 8.2.1
Sizing equation
The manufacturer shall specify the sizing equation and the operational limits in terms of maximum value of the product (Qu × ρ u )max or in other equivalent terms, in the installation manuals or in the relevant catalogue, where Qu is the volumetric flow rate at the inlet flange at operating conditions (not at normal conditions), in m3/h;
ρu is the density of fluid with Qu at the inlet flange in kg/m3. The sizing equation may be as detailed in Annex E. 8.2.2
Documentation provided at the request of the customer
Inspection certificate and/or NDT certificate and/or material certificate in accordance with EN 10204 for pressure containing parts and for bolts, screws and studs if applicable. 8.2.3
Documentation provided with the shut-off device
Installation, operation and maintenance manual, in the language of the country of destination or in the languages accepted by the user, giving appropriate instructions on:
information on safe use of the connections detailed in 9.2 and on safe use of auxiliary devices detailed in 9.3;
safety requirements concerning commissioning and de-commissioning procedures;
safety requirements on filling/discharge of gas of/from SSD;
!periodical functional checks and maintenance;"
a statement of whether maintenance is possible and the relevant instructions;
data on nameplate except serial number, year of manufacturing and specific set range;
hazards arising from misuse and particular features of design when appropriate;
how to trace the right spare parts;
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
response time;
storage requirements for spare parts;
a statement on installation according to the provisions of EN 12186/EN 12279;
a statement that the SSD does not require any protection against exceeding its allowable pressure when for the upstream pressure regulating station the maximum downstream incidental pressure (MIPd) is less than or equal to 1,1 x PS;
!notice for users of SSDs class B on residual hazards on premature and/or unnoticed failure of pressure detector element,"
shall be included with each SSD or shipment of SSDs.
8.3 Documentation related to production surveillance in accordance with 6.6 8.3.1
Documentation to be available for production surveillance
For each series of SSDs the manufacturer shall have available the following documentation:
type test report;
records of inspections satisfactorily passed during the manufacturing process.
8.3.2
Production surveillance report
The production surveillance report shall detail the results of all tests and verifications listed in 6.6.
9
Marking
9.1 General requirements Each SSD shall carry markings containing at least the following data:
manufacturer’s name and/or logo and/or registered trade-mark;
manufacturer’s town and country;
safety shut-off device type;
EN 14382 (this document);
temperature class (class 1 or class 2);
functional class (class A or class B);
!type of SSD (IS or DS);"
serial number;
year of manufacture;
nominal size DN;
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
flange ratings;
allowable pressure PS;
valve seat diameter (only where different sizes are provided) or valve trim (for this term see EN 60534-1) or the flow coefficient;
specific set range;
!maximum component operating pressure pmax and the specific maximum allowable pressure PSD of safeguarded chamber (for differential strength SSDs only);"
leakage class in accordance with EN 1349 (for cut-off devices only);
where necessary, warning drawing attention to dangerous misuses;
additional marking in accordance with order specification.
The data shall be indicated using the symbols of this document. The flow direction shall be marked clearly and permanently on the body by an arrow. If a nameplate is used it shall be permanently legible and attached at a clearly visible place. The technical details listed above shall be repeated in the inspection certificate (see Annex F). The CE marking, where applicable, shall be accompanied by the manufacturer’s name and/or logo and/or registered trade-mark, SSD type, serial number, year of manufacture, allowable pressure, specific set range and operating temperature range.
9.2 Marking of connections for sensing, exhaust and breather lines Each connection shall be marked in terms of:
function, e.g. breather line, sensing line, exhaust line, etc.;
minimum nominal diameter for the pipework concerned.
9.3 Identification of auxiliary devices The following devices shall be identified if applicable, as specified in the order specification:
bypass;
relatching device;
manual closing device.
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Annex A (informative) Ice formation
A.1 General These requirements and tests apply only to SSDs whose function could be impaired by external ice formation.
A.2 Requirements These SSDs should be constructed or protected in a manner designed to avoid negative influences of ice formation due to humidification.
A.3 Tests The SSD is installed in a test rig and the trip pressure is adjusted for the lowest value of its set range. The relevant tests of 7.8 and 7.9.3 are carried out the following way: a) the SSD with its closing member in the open position is cooled down to the minimum operating temperature, the value of the operating pressure is set to approximately 50 % of PS; b) after temperature stabilization the ambient temperature is raised to (0 ± 2) °C. Water is sprayed on the SSD from above and around (as if from a hemisphere) until a homogeneous layer of ice has formed; c) the ambient temperature is again lowered to the minimum operating temperature. After temperature stabilization the following items are verified in accordance with 7.9 and 7.8 by varying the pressure in the sensing line:
trip pressure;
internal leakage.
Check if the requirements of 5.2.3 (internal sealing) and 5.3 (accuracy group) are met.
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Annex B (informative) Compliance evaluation4)
B.1 General This document contains the conditions for the compliance evaluation of any single SSD to the document. However, in order to make an assessment of compliance of a full range of SSDs coming off a production line, more elements may be needed such as a factory production control system or quality management system, a type-testing scheme, a qualification scheme and/or a certification scheme. These systems are independent from the strict evaluation of conformity of a single SSD, and may be required either by legislation or regulations, or by contractual agreements. Unless there is an appropriate system in place, CEN/TC 235 is of the opinion that the following clauses represent minimal conditions to assess the compliance evaluation of a series of SSDs and of those coming off a production line to this document. For SSDs certified as in compliance with this document, the manufacturer should carry out the compliance evaluation in accordance with B.4. Where there is a conformity assessment to the PED, the compliance evaluation with this document should not consider the requirements of clauses in Annex ZA. Nevertheless this annex may be considered as guideline also in the conformity assessment to the PED.
B.2 Introduction The compliance certification scheme should meet the requirements of this document and establish:
if the production surveillance in accordance with 6.6 may be carried out by the body, if any, that has certified the quality management system of the manufacturer;
a guideline to be followed when any non-conformities are discovered during the production surveillance as detailed in 6.6;
the certificate of compliance in accordance with 5.10 of EN ISO/IEC 17025:2000.
B.3 Procedure The evaluation of compliance should include:
the type test in accordance with 6.3. The test samples should be chosen as per 6.4;
a production surveillance as described in 6.6 every 5 years. The test samples should include two SSDs for each certified series. The test samples should be chosen at random from the production population present at the moment of the production surveillance visit to the manufacturer’s workshop.
4)
For the purpose of these recommendations the definitions contained in EN 45020 are applied.
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The production surveillance may be carried out by the body, if any, that has certified the quality management system of the manufacturer, if it is provided in the certification scheme of the SSDs. Any other verification pertinent to the quality management system of the manufacturer should be carried out by the body, if any, that has certified the quality management system.
B.4 Manufacturer’s compliance evaluation For each series of SSDs the manufacturer should carry out:
the tests as described in Clause 7. The test samples where applicable should be chosen at least as specified in 6.4;
a permanent internal control of production using a quality management system based on EN ISO 9001. The quality management system should be certified by a third party.
Furthermore, the manufacturer should retain and file:
the material certificates for all pressure containing parts;
the NDT reports and the inspection certificate,
for a period of at least ten years from the delivery of the SSD. A copy of these certificates should be made available to the purchaser if requested in the order specification.
B.5 Issue of the certificate of compliance If the series of SSDs complies with this document a ”Certificate of compliance” may be issued.
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Annex C (informative) Pressure drop and flow coefficient
C.1 Calculation method for pressure drop throughout the SSD For stand-alone SSDs the calculation of pressure drop should be carried out in accordance with the following formula:
∆p =
t + 273 Q 2 1 × e × ×d 163 795 pu + pb C v2
where
∆p is the pressure drop in bar; Q
is the volumetric flow rate at normal conditions in m3/h;
Cv is the flow coefficient; tu
is the gas temperature at the inlet of the SSD in °C;
pu is the gas pressure at the inlet of the SSD in bar; pb is the absolute ambient atmospheric pressure in bar; d
is the relative density (air = 1, non dimensional value).
C.2 Test method for the determination of the flow coefficient Cv a) Install the SSD in a test rig as given in 7.7.7.4.7 of EN 334:2005; b) set the test conditions so that the velocity at the inlet of the SSD is the maximum possible; c) determine the flow coefficients with:
C vi =
Qi × 404,72
d × (t ui + 273) ( p ui + p b ) × ∆pi
where Qi is the test volumetric flow rate at normal conditions in m3/h; tui is the test fluid temperature measured at the inlet of the SSD in °C; pui is the test fluid pressure measured with volumetric flow rate Qi at the inlet of the SSD in bar;
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
∆pi is the measured pressure drop with volumetric flow rate Qi across the SSD in bar; d
is the relative density of test fluid (air = 1, non dimensional value);
d) repeat the test and calculations b) and c) respectively with two different operating conditions, changing the value of volumetric flow rate and/or the inlet pressure; e) calculate the flow coefficient as arithmetic mean with:
Cv =
62
Cv1 + Cv2 + Cv3 3
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex D (informative) Alternative test method for verification of the strength of the trip mechanism, valve seat and closing member
D.1 Test method a) Assemble the SSD with all movable parts, including those in the overpressure monitoring unit, in the normal operating position; b) with no fluid flowing through the body of the SSD, measure the force Tsl at which the first yielding or failure becomes apparent in any movable part or when the closing member closes; c) repeat the test as above but with the SSD assembled with its underpressure monitoring unit; d) Tsl is the force required to cause yielding/failure or the force required to close the closing member, whichever is the lower; e) the maximum volumetric flow rate at inlet flange should be:
Qul ≤ 0,002 826 × DN 2 ×
Tsl k × Cr × A × ρ ul
where Tsl is the measured force in N; A
is the area of the closing member exposed to fluid flow in m2;
k
= 3 (when the force Tsl causes yielding or failure in the trip mechanism);
k = 1,5 (when the force Tsl causes the closing member to close without any yielding or failure in the trip mechanism); for Qul and ρul see 7.15; for Cr see D.2.
D.2 Test method for the determination of the dynamic factor Cr The test method described hereafter refers to Figure D.1: a) assemble the SSD with all internal movable parts in their normal operating position and install it on a test rig in accordance with 7.7.7.4.7 of EN 334:2005. The external movable parts are not necessary; b) with maximum pressure applied to the body and for three different values of flow, measure the force (Tit) on the stem;
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c) calculate the single dynamic factors for the three values of flow with:
Cri =
Tit 2 A × c uti × ρ uti
where Tit is the measured force on stem in N; A
is the area of the closing member exposed to fluid flow in m2;
cuti is the velocity of the fluid with test volumetric flow rate at test conditions (not at normal conditions) at the inlet flange in m/s
ρuti is the density of test fluid at the inlet flange in kg/m3; d) calculate the dynamic factor of the SSD as arithmetic mean of above three single values: C + C + Cr3 Cr = r1 r2 3
Key 1 2 3
Inlet Outlet Load Tit
Figure D.1
D.3 Test method for a series of SSDs a) Carry out the tests as in D.2 on a test sample of at least three sizes in the series; the sample should include the smallest, the largest and the average sizes; b) calculate the Reynolds number for the sizes of the test sample with:
Re =
64
L × cuti × ρ uti
ηt
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
where L
is the max. dimension of the closing member perpendicular to the flowing fluid in m;
ηt
is the viscosity of the test fluid in kg × s/m2;
c) trace the curve Cr =f(Re) if the value of Cr is found to vary with size; d) !calculate the Reynolds number at Qul for each size of SSD not included in the test sample with:" Re =
L × c ul × ρ ul
η
where cul is the velocity of the fluid with Qul at the inlet flange in m/s;
ρul is the density of the fluid with Qul at the inlet flange in kg/m3; η
is the viscosity of the fluid with Qul in kg × s/m2;
for meaning of Qul see 7.15; e) !extrapolate the value of Cr from the curve c) for each size not included in the test sample using the relevant Reynolds number as calculated in d)."
65
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex E (informative) Sizing equation
The flow of an SSD should be not higher than:
Qmax ≤ 404,72 × C v × ∆p max
Qmax ≤ 0,76 × DN 2 ×
pu + pb d × (t u + 273 )
pu + pb Tsl × t u + 273 k × Cr × A × ρ u
whichever is the lower, unless it is necessary to limit the flow due to noise. where Qmax
is the maximum flow rate in m3/h at normal conditions;
CV
is the flow coefficient;
d
is the relative density (air = 1, non dimensional value);
pu
is the inlet pressure in bar;
pb
is the absolute ambient atmospheric pressure in bar;
∆pmax
is the maximum pressure drop across the SSD in bar;
tu
is the fluid temperature at the inlet of the SSD in °C;
ρu
is the density of fluid at the inlet flange kg/m3;
k is the safety factor. This value should be specified by the manufacturer. k ≥ 3 (when, subject to Tsl yielding or failure occurs in the trip mechanism); k ≥ 1,5 (when, subject to Tsl the closing member closes without any yielding or failure in the trip mechanism). For further information see Annex D; for the meaning of Tsl and A see Annex D.
66
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex F (informative) Inspection certificate
Where an inspection certificate and declaration of compliance with this document is provided, the following gives an example of the format which may be used. When the SSD is built into a pressure regulator, the certificate should be in accordance with Annex B of EN 334:2005.
67
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
! MANUFACTURER’S TRADE MARK/NAME TYPE SERIAL NO. END CONNECTIONS:
Inspection document type 3.1 according to EN 10204 Declaration of compliance according to EN ISO/IEC 17050-1
DN
PN
FACE-TO-FACE ______________
overall dim. drg. MATERIALS
FIXTURES
assembly drg. PRESSURE CONTAINING PARTS
N° ________ Date ________
FUNCTIONAL CHARACTERISTICS Allowable pressure PS pumax Maximum operating pressure Wdso Specific set range for overpressure Wdsu Specific set range for underpressure a bp Valve seat diameter
________ ________ ___to___ ___to___ ________ ________ ________
bar bar bar bar mm bar s
Max. loading pressure a ta Response time Max. operating pressure of ……….….. (chamber in differential p bar max ________x strength SSD) a Specific maximum allowable pressure of …………….. PSD ________ bar (chamber in differential strength SSD) a Temperature class ________ Functional class ________ Settings: pdso _______ bar pdsu ________ bar (only if at shipment the adjusting screw is sealed) CLASS OF: accuracy group AG ______________ bpu __________ bar Strength test
TESTS
Body and inner metallic partition walls 1,5 PS (min. PS + 2) ______ bar
Controller
bar
Fixtures ______ bar
Controller
bar
Fixtures ______ bar
External tightness test Body 1,1 PS _______ bar Internal sealing test at 0,1 bar and at 1,1 PS
bar
Setting of: __________ at ______ bar __________ at ______ bar __________ at bar The above-described product(s) is(are) in compliance with EN xxxxx. SIGNATURE OF THE INSPECTOR SIGNATURE OF THE SIGNATURE OF THE PERSON OR PERSON AUTHORIZED BY THE PERSON RESPONSIBLE AUTHORIZED BY THE CUSTOMER b FOR THE TESTS MANUFACTURER (for witnessing the acceptance test only) a
When applicable.
b
When acceptance test in accordance with Annex H is specified in order specification.
"
68
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex G (informative) Order specification
G.1 General The ordering of SSDs, especially for bigger sizes, depends largely on the conditions on site, other SSDs already in the network, interchangeability and other factors. Therefore, in addition to the minimum specifications in tenders, offers and orders other specifications as mentioned in the document may be required.
G.2 Minimum specifications G.2.1 Details of construction
direct acting/indirect acting;
integral strength/differential strength;
type of end connections;
additional features;
for cut-off devices, leakage class (in accordance with EN 1349) relevant to internal sealing.
G.2.2 Dimensions
SSD size DN;
nominal pressure PN;
face-to-face dimension;
valve seat diameter.
G.2.3 Performance
set range or set point Wdo/Wdu/ Wdso/ Wdsu/pdso/pdsu;
allowable pressure PS;
accuracy group AG;
operating temperature range (class 1 or class 2);
functional class (class A or class B).
69
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
G.3 Optional specifications
lifting facilities;
sealing of adjusting devices;
manual closing device;
extended operating temperature range;
internal sealing requirements in accordance with EN 1349;
additional marking;
test in accordance with Annex A for outdoor installation (ice formation);
maximum pressure drop at specified operating conditions;
maximum loading pressure;
!deleted text"
relatching difference;
resetting arrangement (e.g. a removable operating lever);
underpressure shut-off;
acceptance test in accordance with Annex H;
external bypass for pressure equalization;
adjustable response time;
specific response time and relevant test (only for cut-off devices);
closing force;
inspection certificate;
NDT certificate;
material certificate class in accordance with EN 10204 for pressure containing parts;
material certificate class in accordance with EN 10204 for bolts, screws and studs;
languages for manual accepted by the user.
70
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex H (informative) Acceptance test
Acceptance tests and verifications are carried out on the finished SSD by the manufacturer in the presence of the purchaser’s inspector before shipping, if specified in the order specification. The tests are:
dimensional check and visual inspection in accordance with 7.1;
material check in accordance with 7.2;
external tightness test in accordance with 7.7;
internal sealing in accordance with 7.8;
set value of the trip pressure in accordance with 7.9.2 at ambient temperature.
Unless otherwise specified, the number of SSDs selected for an acceptance test should be as follows:
2 SSDs for batches of 2 to 4 pieces;
3 SSDs for batches of 5 to 8 pieces;
4 SSDs for a batches of 9 to 20 pieces;
5 SSDs for batches of 21 to 30 pieces;
6 SSDs for batches of 31 to 60 pieces;
10 %5) for batches > 60 pieces.
Additional tests, if required, may be specified in the order specification.
5)
Rounded up to a whole number.
71
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex I (informative) !Seat leakage (alternative requirement)"
This annex establishes a series of seat leakage classes related to the specific internal sealing requirements. If requested in the order specification the internal sealing requirements may be in accordance with EN 1349. The leakage class will be included:
on the nameplate;
on the inspection certificate.
72
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex J (normative) Materials
J.1 Steel materials for pressure containing parts and inner metallic partition walls !The steel materials listed in Table J.1 with the restrictions listed in the last 5 columns of the same table,
are suitable for the design of pressure containing parts and inner metallic partition walls of SSDs complying with this European Standard."
73
74
Rolled and forged steel
Group
Relevant document -10 °C to 60 °C a
P275NH / 1.0487, P355NH / 1.0565 with thickness ≤ 150 mm, P355NL1 / 1.0566 with 5 mm ≤ product thickness ≤ 150 mm All types All grades from P355 to P 500 with product thickness ≤ 150 mm All austenitic steel designation, other steel designation with Amin ≥ 16 % and impact properties at temperatures < –20°C
P235GH / 1.0345, P265GH / 1.0425, P295GH/ 1.0481, P355GH / 1.0473 all with product thickness ≤ 150 mm
S235J2G3 / 1.0116 & S235J2G4 / 1.0117 both with 1 mm < nominal thickness ≤ 150 mm, S275J2G3 / 1.0144 & S275J2G4 / 1.0145 & S355J2G3 / 1.0570 all with 2,5 mm < nominal thickness ≤ 150 mm S275JO / 1.0143 & S355JO / 1.0553 both with 1,5 mm < nominal thickness ≤ 250 mm and supplementary requirements KV 27 J av. of three and 20 J min at –20 °C
c
c
c
10028-7
c
10028-4 , 10028-5 c 10028-6
10028-3
10028-2
10025
c
x
x
x
x x
x
x
100
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls
S235JR / 1.0037 with thickness ≤ 40 mm, S275JR / 1.0044 with thickness ≥ 1,5 mm, S355JR/ 1.0045 with thickness ≥ 1,5 mm
Type
Materials
Table J.1 - Steel materials for pressure containing parts and inner metallic partition walls
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
EN
-
bar x mm
[PS x DN b]max
-
mm
DNmax b
Rolled and forged steel
Group
Relevant document -10 °C to 60 °C a
requirements KV 27 J av. of three and 20 J min at –20 °C All steel designations All steel designations
10130 10210-1
All steel designations used for skin-pass S275J2H, S355J2H P195TR2 / 1.0108, P235TR2 / 1.0255, P265TR2 / 1.0259 P195TR2 / 1.0108, P235TR2 / 1.0255, P265TR2 / 1.0259 with supplementary requirements KV 27 J av. of three and 20 J min. at –20 °C All steel designations with Amin ≥ 16 % and supplementary c
c
c
10222-3 c 10222-4
10222-2
10216-1
10111
10088-3
DD11 / 1.0332, DD12 /1.0398, DD13 / 1.0335
analysis C ≤ 0,25 %. All austenitic steel designations, other steel designations with longitudinal Amin ≥ 16 % and supplementary requirements KV 27 J av. Of three and 20 J min. at –20 °C
10083-2 + A1
10083-1 + A1
x
x
x
x
x
x x
x
x
x
x
x
100
bar
PSmax
Safety device
Restrictions
-
bar x mm
[PS x DN b]max
75
-
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls
25 CrMo4 / 1.7218 & 25CrMoS4 / 1.7213 both with 100 mm < d ≤ 160 mm or 60 mm < t ≤ 100 mm, 36CrNiMo4 / 1.6511 with supplementary requirements Amin = 16 %. All types shall be quenched and tempered (+QT) and with supplementary requirements for cast analysis C ≤ 0,25 % or, when 0,25 % < C ≤ 0,40, Ni ≥ 1 % 36CrNiMo4 / 1.6511 quenched and tempered (+QT) with supplementary requirements Amin = 16 % and KV 27 J av. of three and 20 J min. at –20 °C Steel designations quenched and tempered (+QT) with Amin ≥ 16 % and with supplementary requirements for cast
Type
Materials
Table J.1 (continued)
EN
76
Rolled and forged steel
Group Type
Materials
S235J2G3 / 1.0116, S355J2G3 / 1.0570 with tR ≤ 500 mm
All steel designations with longitudinal Amin ≥ 16 % and with supplementary requirements for cast analysis cast analysis C ≤ 0,25 %
All austenitic grades All steel designations of austenitic steels, other steel designations with Amin ≥ 16 % and supplementary requirements KV 27 J av. of three and 20 J min at –20 °C E235 / 1.0308, E275 / 1.0225, E315 / 1.0236, E355 / 1.0580 E275K2 / 1.0456, E355K2 / 1.0920, E420J2 / 1.0599, E460K2 / 1.8891 A 105M with supplementary requirement for chemical composition: C ≤ 0,25 %, A 105N (normalized) with hardness between 137HB to 187HB (supplementary requirements S1 and S2.4) A 106 grade A, A 106 grade B with supplementary requirement for chemical composition: C ≤ 0,25 % or hardness ≤ 187 HB !A 106 grade B with supplementary requirements KV 27 J av. of three and 20 J min. at –20 °C Types F5a/F6a class 2 with supplementary requirements KV 27 J av. of three and 20 J min. at –20°C, types F304 and F316 A 234M grade WP1 with supplementary requirement for chemical composition: C ≤ 0,25 % and all remaining grades except the grades WPB and WPC
All steel designations with Amin ≥ 16 %
-10 °C to 60 °C a
c
A 234/A 234M
A 182/A 182M x
x
A 106 A 106/A 106M – 04b
x
x
x
x
A 105/A105M
10297-1
10272
10250-4
10250-2
10222-5
x
Restrictions
x
x"
x
x
x
x
x
100
bar
PSmax
Safety device
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls
Relevant document
Table J.1 (continued)
All steel designations austenitic type, other steel types with Amin ≥ 16 % and supplementary requirements KV 27 J av. of three and 20 J min. at –20 °C
All steel designations martensitic type
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
EN ASTM
-
bar x mm
[PS x DN b]max
-
mm
DNmax b
Rolled and forged steel
Group Relevant document
A 707M all grades from L2 to L8 and all classes
and KV 27 J av. of three and 20 J min. at –20°C, A 564 T630 H1150 and H1150M with supplementary requirements KV 27 J av. of three and 20 J min. at –20°C A 694 all grades with supplementary requirement for chemical composition: C ≤ 0,25 % A 694 Gr F60 with supplementary requirement KV 27 J av. of three and 20 J min at –20 °C
supplementary requirement KV 27 J av. of three and 20 J min. at –20 °C A 266 grade 4 with supplementary requirement for chemical composition: C ≤ 0,25 % !A 311 grade 1018 with diameter, thickness, or distance between parallel faces up to 30 mm incl. and with supplementary requirement s KV 27 J av. of three and 20 J min. at –20 °C A 276 all austenitic grades A 333M all grades A 350M LF2 class 1, LF3, LF5 classes 1 & 2, LF6 class 1 & 2, LF9, LF787 classes 2 & 3 A 420M all grades A 516 all grades with KV 27 J av. of three and 20 J min. at -20°C (supplementary requirement S5) A 564 H1075 with supplementary requirements Amin ≥ 16 %
-10 °C to 60 °C a
x x
A 420/A 420M A 516/A 516M
A 707/A 707M
A 694/ A694M
x
x
A 350/A 350M
x
x
x
x x
A 276 A 333/A 333M
A 564/ 564M
x"
x
x
-20 °C to 60 °C
A 311 / A 311M
A 266A/ 266M
A 240
Restrictions
100
bar
-
bar x mm
[PS x DN b]max
77
-
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Safety device PSmax Operating temperature
Pressure containing parts and inner metallic partition walls
All austenitic types, all other grades with Amin ≥ 16 % and
Type
Materials
Table J.1 (continued)
ASTM
Relevant document
These material can be used for operating temperature from –20 °C to 60 °C when PS ≤ 25 bar.
For the bodies of pilots or fixtures this term shall refer to their inlet connections.
Harmonized supporting document to PED at the time of writing.
a
b
c
78
-10 °C to 60 °C a
x
x
x
x
x
x
x
x
x
100
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls c All steel designations EN 10213-3 A 216M grades WCA and WCC, A 216M grade WCB with supplementary requirement for x chemical composition C ≤ 0,25 % or hardness A 216/A 216M ≤ 187HB A 216M WCB with supplementary requirement KV 27 J av. and 20 J min at –20°C A 217 all grades x A 217 grade CA15 with supplementary A 217/A 217M requirements KV 27 J av. of three and 20 J min at –20 °C All austenitic types, all other grades with A 351/A 351M supplementary requirements A ≥ 16 % and KV 27 J av. of three and 20 J min at –20 °C A 352M all grades A 352/A 352M A 426 all grades x A 426 grade CPCA15 with KV 27 J av. of three A 426 and 20 J min at –20 °C (supplementary requirement S 11) A 451 all grades A 451 17-4ph H1100 with supplementary requirements AMS5355 (Aerospace Material Specification) Amin ≥ 15 % and KV 27 J av. of three and
Type
Materials
Table J.1 (concluded)
20 J min at -20° C Fe G-450 UNI 3158 The following remarks shall be applied to all sheets of this table
Cast steel
Group
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
ASTM
-
bar x mm
[PS xDN b]max
-
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
J.2 Metallic materials different from steel materials for pressure containing parts and inner metallic partition walls !The metallic materials listed in Table J.2 with the restrictions listed in the last 5 columns of the same table, are suitable for the design of pressure containing parts and inner metallic partition walls of SSDs complying with this European Standard."
79
80
Malleable cast iron
Spheroidal graphite cast iron
Group
Relevant document -10 °C to 60 °C a
Grades 60-40-18, 65-45-12 and 80-55-06
EN-GJS400-15 / EN-JS1030, EN-GJS-400-18URT / EN-JS1059 with wall thickness ≤ 60 mm !400-18LT/S 400-15/S, 400-18/S A 395M A 536 Grade 60-40-18
EN-GJS400-18-LT / EN-JS1025, EN-GJS-40018U-LT / EN-JS1049 with wall thickness ≤ 60 mm
ASTM A 536
ASTM A395/A 395M ASTM A 536
ISO 1083
EN 1563
x x x
x
x
x "
x
x x x x x
x
20
50
20
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls EN-GJS400-18 / EN-JS1020, EN-GJS400-18-LT / EN-JS1025, EN-GJS400-15 / EN-JS1030, ENEN 1563 GJS 400-18U-LT / EN-JS1049 A 395M A 395/A 395M A 536 Grades 60-40-18 & 65-45-12 A 536 A 874M A 874/A 874M !400-15/S, 400-18/S, 500-7/S" ISO 1083 420-12 BS 2789
Type
Materials
1 000
5 000
1 500
bar x mm
[PS xDN b]max
Table J.2 - Metallic materials different from steel materials for pressure containing parts and inner metallic partition walls
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
ASTM
100
300
1000
mm
DNmax b
Aluminium wrought alloys
Copper-tin and copper-zinc cast alloys
Copper-zinc wrought alloys
Group
Cu Sn5Zn5Pb5-B (CB491K) and CuSn5Zn5Pb5-C (CC491K)
Al 99,5 Al Cu 5.5 Pb 0,4 Bi 0,4 Al Si 1 Mg 0,9 Mn 0,7 (6082) in T6 conditions Al Mg 1 Si 0,6 Cu 0,28 Cr 0,20 (6061) in T6 conditions
All metallurgic state and thickness for which Amin ≥ 4 %
All metallurgic state & dimensions for which Amin ≥ 4 %
All metallurgic state & thickness for which Amin ≥ 4 %
ASTM B 584 all UNS nos with elongation ≥ 15 %
All material designations with A ≥ 5 %
Relevant document -10 °C to 60 °C a
x x x x x x x x x
485-2 586-2 754-2 755-2 9001-2 9002-5 9006-4 9006-2
x
x
ASTM B 584
12844
c
x x x x
4892 4894 5705-65 1652 1982
x
ASTM B 283
x x x
20
100
20
100
bar
PSmax
Safety device
Restrictions
-
-
1 000
-
bar x mm
[PS x DN b]max
81
50
25
100
25
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls 1652 12164 12165
P-Cu Zn 37 all denominations with A ≥ 15 % P-Cu Zn 33 all denominations with A ≥ 15 % P-Cu Zn 40 Pb 2 all denominations with A ≥ 15 % All material designations with A ≥15 %
ASTM B 283 - UNS No C 37700 & 64200
All material designations with A ≥ 15 % All material designations with A ≥ 15 % All material designations with A ≥ 15 %
Type
Materials
Table J.2 (continued)
EN
UNI EN EN UNI
82
Aluminium wrought alloys
Group Type
Materials Relevant document
Table J.2 (continued)
-10 °C to 60 °C a
Al Mg 1 Si 0,6 Cu 0,28 Cr 0,20 (6061) in T6 conditions with thicknesses / diameters range for which A ≥ 7 % Al Si 1 Mg 0,9 Mn 0,7 (6082) in T6 conditions with thicknesses / diameters range for which A ≥ 7 %
Al Mg 0,5 Si 0,4 Fe 0,2 (6060) in T6 conditions
All metallurgic state and dimensions for which Amin ≥ 7 %
All metallurgic state & dimensions for which Amin ≥ 7 %
Al Mg 1 Si 0,6 Cu 0,28 Cr 0,20 (6061) in T6 conditions with thicknesses / diameters range for which A ≥ 7 % Al Si 1 Mg 0,9 Mn 0,7 (6082) in T6 conditions with thicknesses / diameters range for which A ≥ 7 % All metallurgic state & thickness for which Amin ≥ 7 %
Al Mg 0,5 Si 0,4 Fe 0,2 (6060) in T6 conditions
6082
All metallurgic state and thickness for which Amin ≥ 7 %
All metallurgic state & dimensions for which Amin ≥ 7 %
x
9006-1
x
x x x x
485-2 586-2 754-2 755-2
9006-4
x
9006-4
x
x
9006-2
9006-2
x
x x x x x
9006-1
586-2 754-2 755-2 BS 1474
100
50
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls All metallurgic state & thickness for which Amin ≥ 7 % 485-2
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
EN
UNI EN UNI
-
-
bar x mm
[PS x DN b]max
25
50
mm
DNmax b
Relevant document -10 °C to 60 °C a
These material can be used for operating temperature from –20 °C to 60 °C when PS ≤ 25 bar.
For the bodies of pilots or fixtures this term shall refer to their inlet connections.
Harmonized supporting document to PED at the time of writing.
a
b
c
x x x x x
250 1600
20
bar x mm
[PS x DN b]max
10
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
Operating temperature
Pressure containing parts and inner metallic partition walls EN 1706 ASTM B85 BS 1490 EN 1706 ASTM B85
All alloy designations with elongation ≥ 1,5 % All alloy designations with elongation ≥ 1,5 % LM4, LM6, LM 24, LM25, All alloy designations with elongation ≥ 4 % All alloy designations with elongation ≥ 4 %
Type
The following remarks shall be applied to all sheets of this table
Aluminium cast alloys
Group
Materials
Table J.2 (concluded)
83
1000
150
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
J.3 Materials for fixtures, integral process and sensing lines, connectors and fasteners The materials listed in the previous Tables J.1, J.2 and/or in the following Table J.3 with relevant restrictions are suitable for the design of fixtures. The materials listed in the following Table J.3 with relevant restrictions are suitable for the design of integral process and sensing lines, connectors and fasteners of !SSDs" complying with this document.
84
Pipes
Various
Component
Cu 999 X6CrNiMoTi17-12-2 / 1.4571 All grades All grades TP 304, TP 304L, TP 316, TP 316L TP 304, TP 304L, TP 316, TP 316L TP 304 Grade 6 Screwed and socket steel tube St 37.4 / 10255 St 35 / 1.0308 X6 Cr Ni Ti 1810 / 1.4541
EN 10277-3 a
Fixtures
Relevant document
x x x x x x x x x x x x
x
-
-
100
-
bar x mm
25
100
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
Operating temperature -10 °C to 60 °C
Integral process and sensing lines EN 1057 EN 10088-1 API specification 5L A 106 A 213/A 213M A 269 A 312/A 312M A 333/A 333M BS 1387 1630 2391-2 17458
11SMn30 / 1.0715, 11SMn37 / 1.0736, 11SMnPb30 / 1.0718, 11SMnPb37 / 1.0737, 35S20 / 1.0726, 35SPb20 / 1.0756, 36SMn14 / 1.0764, 36SMnPb14 / 1.0765, 38SMn28 / 1.0760, 38SMnPb28 / 10761, 44SMn28 / 1.0762, 44SMnPb28 / 1.0763, 46SPb20 / 1.0757 all with thickness within the extreme limits specified by the document and supplementary requirement Amin ≥ 16 %
Type
Materials
[PS x DN b]max
85
-
-
25
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Table J.3 - Materials for fixtures, integral process and sensing lines, connectors and fasteners
ASTM
DIN
Class 10.9 Class 10 All alloy groups and types with Amin ≥ 9 % for bolts, screws and studs !All austenitic designations Class 4.6, 5.6, 8.8 Grade A2ss, A4ss Classes. 5, 8, 9 for nuts All grades All grades for nuts All classes and grades All alloy groups and types with Amin ≥ 12 % for bolts, screws
For the bodies of pilots or fixtures this term shall refer to their inlet connections.
b
86
Supporting document for new approach directives.
a
x x x x
F 594 SAE J429 SAE J995
x" x x x x x x
F 593
10088-3 ISO 898-1 ISO 3506 20898-2 A 193/A 193M A 194/A 194M A 320/A 320M
x
ASTM F 593
x x x
x
100
50
100
bar
PSmax
Safety device
Restrictions
-20 °C to 60 °C
x x
-10 °C to 60 °C
Operating temperature
10088-3 ISO 8434 ASTM A 420/A 420M Fasteners EN ISO 898-1 EN 20898-2
10277-3 a
Connectors
Relevant document
Table J.3 (concluded)
All steel designations with Amin ≥ 8 % and thickness within the relevant limits specified by the document All steel designations All steel designations All grades
Type
Materials
and studs All alloy groups Grade 8 for bolts etc. Grade 8 for nuts The following remarks shall be applied to all sheets of this table
Bolts, screws, studs and nuts
Compression fittings
Component
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
EN EN ASTM
-
-
-
bar x mm
[PS x DN b]max
-
-
-
mm
DNmax b
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex K (informative) !Suitability of safety shut-off device for damp operating conditions
K.1
Test procedure, requirement and acceptance criteria
This type test should be applied to SSDs actuated by a levers system not immersed in the flowing gas. It should be carried out on, at least, one size of SSD, which should be representative of all sizes of the relevant series of SSDs actuated by a levers system not immersed in the flowing gas. The SSD shall be equipped with: the over-pressure setting element for the lowest set range and set at mid-point pdso. The setting shall not be adjusted throughout the test and vent lines, if any, as specified by the manufacturer. The SSD is installed inside an appropriate chamber: at most critical position specified by manufacturer, with the inlet and outlet end connections sealed, with only the controller under a pressure. Special provisions shall be adopted for SSDs that are internally impulsed from the inlet or outlet side, latched at open position and subjected 100 cycles of temperature and humidity as follows. A cycle shall take a minimum period of 5 h from (60 ± 2) °C at minimum of 90 % relative humidity to (5 ±2) °C at a minimum of 90 % relative humidity to (60 ±2) °C at minimum of 90 % relative humidity. After completion of 100 cycles, the SSD shall be brought to ambient temperature and subjected to the following test: a) ensure that the body is at atmospheric pressure; b) with the SSD in the open position, starting from approximately 80 % of the selected trip pressure, increase the monitored pressure at a pressure change rate not greater than 1,5 % of the selected trip pressure per second until closure of the SSD occurs. The test requirements are met if the value of the trip pressure in b) is within:
AG pdso × 1 ± 100
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Annex L (informative) Glossary
English
French
German
Sub-clause
Accuracy group Actual value of the trip pressure Actuator Body Breather line Bypass Closing force Closing member Component operating pressure Controller Cut-off device Differential pressure
Classe de précision Valeur réelle de la pression de déclenchement Actionneur Corps Conduit de respiration bipasse Force de fermeture Organe de fermeture
Ansprechdruckgruppe
3.3.6.2
Istwert des Ansprechdrucks
3.3.3.1
Stellantrieb Stellgliedgehäuse Atmungsleitung Druckausgleichseinrichtung Schließkraft Stellglied
3.2.1.3 3.2.1.5 3.2.8 3.2.1.9 3.4.10 3.2.1.1
Komponentenbetriebsdruck
3.4.1 3.2.1.8 3.1.4 3.3.1.1
Direct acting shut-off device
Clapet à action directe
Disturbance variables
Grandeurs de perturbation Conduit de mise à l’atmosphère Accessoires Volume de gaz
Kontrollgerät Sicherheitsabsperrarmatur Differenzdruck direkt wirkende Sicherheitsabsperreinrichtung Störgrößen Abblaseleitung
3.2.7
Zusatzeinrichtungen Gasvolumen indirekt wirkende Sicherheitsabsperreinrichtung
3.2.2 3.3.5.2
Exhaust line Fixtures Gas volume Indirect acting shut-off device Inlet operating pressure range Inlet pressure Inner metallic partition wall Limit pressure Loading pressure Loading pressure line Main component Maximum component operating pressure Maximum allowable pressure Maximum inlet pressure Maximum value Minimum value Monitored pressure Normal conditions
88
Pression de service du composant
Pilote dispositif à fermeture lente Pression différentielle
Clapet à action indirecte Plage de pression de service amont Pression d’alimentation Paroi métallique intérieure de séparation Pression limite Pression de charge Ligne de pression de charge Principaux composants Pression maximale de service d’un composant Pression maximale admissible Pression maximale amont Valeur maximale Valeur minimale Pression surveillée Conditions normales
3.1.2 3.3.2.2
3.1.3
Betriebseingangsdruckbereich
3.3.6.3
Eingangsdruck innere metallische Trennwände Grenzdruck Hilfsdruck
3.4.2 3.2.5 3.4.7 3.3.1.2
Hilfsdruckleitung
3.2.3
Hauptkomponente maximaler Komponentenbetriebsdruck
3.2.1 3.4.1.1
zulässiger Druck
3.4.3
maximaler Eingangsdruck Maximalwert Minimalwert überwachter Druck Normbedingungen
3.4.2.1 3.3.3.2 3.3.3.3 3.3.2.1 3.3.5.1
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
English
French
German
Sub-clause
Nominal pressure Operating temperature range Pressure Pressure containing parts Pressure drop
Nenndruck
3.4.5
Betriebstemperaturbereich
3.4.9
Druck druckbelastete Teile Druckabfall
3.3.1 3.2.4 3.3.6.6
Wiedereinrast-Einrichtung
3.2.1.4
Wiedereinrastdifferenz
3.3.6.5
Response time Safety factor Safety shut-off device Seat ring Sensing line Sensing point
Pression nominale Plage de température de service Pression Pièces sous pression Perte de charge Système de réenclenchement Différence de réenclenchement Temps de réponse Coefficient de sécurité Clapet de sécurité, CS Garniture de siège Ligne d’impulsion Point de détection
3.3.6.4 3.4.8 3.1.1 3.2.1.7 3.2.6 3.1.6
Series of safety shut-off devices
Séries de clapets de sécurité
Set point Set range Specific maximum allowable pressure Specific set range
Plage de réglage Plage de réglage Pression maximale spécifique admise Plage de réglage spécifique Dispositif à fermeture rapide Taille du CS Pression d’essai Mécanisme de déclenchement Pression de déclenchement Variation de la pression de déclenchement Siège de clapet Volume de gaz
Ansprechzeit Sicherheitsbeiwert Sicherheitsabsperreinrichtung Ventilsitz-Dichtring Messleitung Messort Baureihe von Sicherheitsabsperreinrichtungen Sollwert Einstellbereich spezifischer maximal zulässiger Druck spezifischer Einstellbereich
3.3.4.3
Sicherheitsabsperrventil
3.1.5
Nennweite der SAE Prüfdruck
3.1.7 3.4.6
Schaltgerät
3.2.1.2
Ansprechdruck
3.3.2.3
Ansprechdruckabweichung
3.3.6.1
Ventilsitz Volumenstrom
3.2.1.6 3.3.5.3
Relatching device Relatching difference
Slam shut device SSD size Test pressure Trip mechanism Trip pressure Trip pressure deviation Valve seat Volumetric flow rate
3.1.8 3.3.4.1 3.3.4.2 3.4.4
"
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BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 97/23/EC (PED). Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in a least one Member State, compliance with the clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations. Table ZA.1 — Correspondence between this European Standard and Directive 97/23/EC (PED) Clause(s)/subclause(s) of this European Standard 4.3.1, 4.3.2, !4.3.3, " 4.3.4, 4.3.5, 5.6, 5.8 4.1.10, 4.3.1, 4.3.2, !4.3.3," 4.3.4, 4.3.5, 4.3.6, !7.3.1,"7.12 7.3.2. 7.15 4.1.11 !4.1.9, 5.1.7, 5.6, 5.8 !4.1.2.2, 4.1.2.3 !5.1.5 4.1.2.2, 4.1.2.3 7.7.1, 7.8 4.2.1.5 4.2.1.5 4.2.1.6 4.2.1.5 4.2.1.5 6.5 7.5 9.1, 9.2, 9.3 8.2.3 4.2.1.1 4.2.1.2, 4.2.1.4 4.3.5 4.3.6 7.7.1, 7.8 7.5 Annex J.1
Essential Requirements (ERs) of Annex I of PED Nature of Essential Requirement
item
Design for adequate strength
2.2.1
Calculation method
2.2.3
Experimental design method Wear replacement of parts Design, construction and maintenance"
2.2.4 2.7 2.11.1
Independence from regulator" Fail-safe modes for class A SSDs Redundancy" Pressure limiting devices Preparation of component parts Permanent joining Non destructive tests (qualification of personnel) Heat treatment of fabrication welds Traceability Final inspection Proof test Marking and labelling Operating instructions Appropriate characteristics and chemical resistance of materials Compliance of materials with specifications Permissible membrane stress Joint coefficients Short duration pressure surge Final assessment - hydrostatic pressure test Material characteristics
2.11.2 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.2.1 3.2.2 3.3 3.4 4.1 (a), 4.1 (b), 4.2 (a) 4.3 7.1.2 7.2 7.3 7.4 7.5 and 4.1 (a)
!NOTE For shut-off devices dealt with in this standard when used in pressure regulating stations complying with EN 12186 or EN 12279, this table includes all applicable Essential Requirements listed in Annex I of PED except the external resistance to environmental conditions where corrosion is l kely to occur."
90
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
WARNING Other requirements and other EU Directive may be applicable to the product(s) falling within the scope of this standard.
91
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
Bibliography
[1] EN 437, Test gases – Test pressures – Appliance categories !deleted text"
[2] EN 10002-1, Metallic materials – Tensile testing – Part 1: Method of test at ambient temperature !deleted text"
[3] EN 12732, Gas supply system – Welding steel pipework – Functional requirements [4] prEN 13787 rev, Elastomers for gas pressure regulators and associated safety devices for inlet pressures up to 100 bar [5] EN 45011, General requirements for bodies operating product certification systems (ISO/IEC Guide 65:1996) !deleted text"
[6] EN 45020, Standardization and related activities – General vocabulary (ISO/IEC Guide 2:1996) [7] EN ISO 1518, Paints and varnishes – Scratch test (ISO 1518:1992) [8] EN ISO 2409, Paints and varnishes – Cross-cut test (ISO 2409:1992) [9] EN ISO 6708, Pipework components – Definition and selection of DN (nominal size) (ISO 6708:1995) [10] EN ISO 9001, Quality management systems – Requirements (ISO 9001:2000) [11] EN 60534-3-1:2000, Industrial-process control valves – Part 3-1: Dimensions – Face-to face dimensions for flanged, two-way, globe-type, straight pattern and centre-to-face dimensions for flanged, two-way, globe-type, angle pattern control valves (IEC 60534-3-1:2000) [12] EN 60534-3-2, Industrial-process control valves – Part 3-2: Dimensions – Face-to-face dimensions for rotary control valves except butterfly valves (IEC 60534-3-2:2001) [13] ISO 37, Rubber, vulcanized or thermoplastic – Determination of tensile stress-strain properties [14] ISO 48, Rubber, vulcanized or thermoplastic – Determination of hardness (Hardness between 30 and 85 IRHD) [15] ISO 148, Steel – Charpy impact test (V-notch) [16] ISO 188, Rubber, vulcanized or thermoplastic – Accelerated ageing or heat-resistance tests [17] ISO 815, Rubber, vulcanized or thermoplastic – Determination of compression set at ambient, elevated or low temperatures [18] ISO 1431-1, Rubber, vulcanized or thermoplastic – Resistance to ozone cracking – Part 1: Static strain test [19] ISO 5752, Metal valves for use in flanges pipe systems – Face-to-face and centre-to-face dimensions [20] IEC 60534-3, Industrial-process control valves. Part 3: Dimensions. Section one Face-to-face dimensions for flanged, two-way, globe-type control valves
92
BS EN 14382:2005+A1:2009 EN 14382:2005+A1:2009 (E)
[21] !EN ISO/IEC 17050-1, Conformity assessment – Supplier's declaration of conformity – Part 1: General requirements (ISO/IEC 17050-1:2004) [22] ASME B16.34:1996, Valves – Flanged, threaded and welding end"
93
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