Saes J 100

 

Engineering Standard

 

SAES-J-100

13 October 2013

Process Flow Metering Document Responsibility: Instrumentation Standards Comm Committee ittee

Saudi Aramco DeskTop Standards  Table of Contents 

1 

Scope…………………………………………...   2 

2 

Conflicts and Deviations………………………   2 

3 

References……………………………………..   2 

4 

General Design Requirements……………….  4 

5 

Installation Requirements…………………….  6 

6 

Inspection Requirements………………....…  10

 Appendix 1 - Minimum Straight Straight Run Run Lengths Lengths for Orifice Plates without Flow Conditioners in Accordance with  ANSI/APII (ISO 5167 ANSI/AP 5167-2)…………..  11   Appendix 2 - Minimum Straight Straight Run Run Lengths Lengths for Classical Venturis in Accordance with ANSI/API (ISO 5167-4)……..  12 12  

Previous Issue: 22 January 2012

Next Planned Update: 13 October 2018 Page 1 of 12

Primary contact: Al-Swailem, Abdullah Omar on +966-13-8800714 Copyright©Saudi Aramco 2013. All rights reserved. 

 

Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

1

SAES-J-100 Process Flow Metering

Scope This standard defines the minimum mandatory requirements governing the design and installation of process flow instruments. This standard is not applicable to Royalty or Custody Custod y Measurement. 

2

Conflicts and Deviations 2.1

Any conflicts between this standard and other applicable Saudi Aramco Engineering Standards (SAESs), Materials System S ystem Specifications (SAMSSs), Standard Drawings (SASDs), or industry standards, codes, and forms shall be resolved in writing by the Company or Buyer Representative through the Manager, Process & Control Systems Department of Saudi Aramco, Dhahran. Dh ahran.

2.2

Direct all requests to deviate from this standard in writing to the Company or Buyer Representative, who shall follow internal company procedure procedu re  SAEP-302 SAEP-302   and forward such requests to the Manager, Process Proces s & Control Systems Department of Saudi Aramco, Dhahran.  

3

References The selection of material and equipment, and the design, construction, maintenance, and repair of equipment and facilities covered by this standard shall comply with the latest edition of the references listed below, unless otherwise noted.   3.1

Saudi Aramco References  Saudi Aramco Engineering Procedure SAEP-302 SAEP-302  

 In  Insstructions for Obtaining a Waiver of a Mandatory Saudi Aramco Engineering Requirement

Saudi Aramco Engineering Standards SAES-J-002   SAES-J-002

Technically Acceptable Instrument Manufacturers

SAES-J-003  SAES-J-003 

 Instrumentation - Basic Design Criteria Criteria

Saudi Aramco Materials System Specifications 34-SAMSS-010  34-SAMSS-010 

Quality Requirements for Pressure Retaining  Instruments

34-SAMSS-117  

Turbine Flow Meters

34-SAMSS-118 34-SAMSS-118  

 Positive Displacement Meters Page 2 of 12

 

Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

Saudi Aramco Standard Drawings  AD-036004    AD-036004

Orientation for Orifice Flanges

 AB-036094  AB-036094    AC-036413   AC-036413 

Standard Orifice Plates  Raised Face Orifice Flange Assembly

 AB-036414   AB-036414 

 Ring Joint Orifice Flange Assembly

Saudi Aramco Forms and Data Sheets

3.2

SA  3175-ENG  SA 3175-ENG 

Orifice Plate Detail for RF Flanges

SA  6078-ENG  SA 6078-ENG 

 Instrument Specification Sheet - Flow Instruments

SA  8020-113-ENG SA 8020-113-ENG  

 Instrument Specification Sheet - Flow TransmittersSmart (Differential Pressure)

SA  8020-115-ENG  SA 8020-115-ENG 

 Instrument Specification Sheet - Metering Orifice Calculation Conventional Units

SA  8020-116-ENG  SA 8020-116-ENG 

 Instrument Specification Sheet - Venturi Tube Specification and Calculation

SA  8020-117-ENG  SA 8020-117-ENG 

 Instrument Specification Sheet - Turbine Meters

SA  8020-118-ENG  SA 8020-118-ENG 

 Instrument Specification Sheet - Liquid Positive  Displacement Meters

Industry Codes and Standards American Gas Association (AGA)  AGA Report 3

Orifice Metering of Natural Gas

 AGA Report 8

Compressibility and Supercompressibility for  Natural Gas and Other Hydrocarbon Gases

 AGA Report Report 9

Measureme Measurement nt of of Gas Gas by Multipat Multipath h Ultras Ultrasonic onic Meters Meters 

American Petroleum Institute  API MPMS 14.3.2  14.3.2 

 Natural Gas Fluids, Concentric, Square-Edged, Orifice Meters, Specifications and Installation  Requirements

Commentary Note:  ANSI-2530/API-14.3/AGA- 3 are identical documents, so they can be used  ANSI-2530/API-14.3/AGA-3 interchangeably.

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

American Society of Mechanical Engineers  ASME B16.36

Orifice Flanges

 ASME B16.47

Large Steel Flanges:  NPSDiameter 60 Metric/Inch StandardNPS 26 through

International Organization for Standardization  ISO 5167 Parts 1-4

Measurement of Fluid Flow by Means of pressure  Differential Devices Inserted in Circular CrossSection Conduits Running Full

Other References  Flow Measurement Engineering Handbook by Miller, R.W.

4

General Design Requirements 4.1

Environmental Conditions Process flow metering instrumentation shall meet all the relevant requirements SAES-J-003  pertaining  pertaining to indoor and outdoor environmental conditions. of  SAES-J-003

4.2

Standard Conditions The standard reference atmospheric conditions shall be 15.56°C 15. 56°C (60°F) and 101.325 kPa (abs) (14.73 psia). Engineering units of volume at standard reference conditions shall be as specified in  in  SAES-J-003. SAES-J-003. 

4.3

Selection Criteria 4.3.1

Process flow metering instruments be supplied per  SAES-J-002,  “Technically Acceptable Instrumentshall Manufacturers”. Manufacturers”.     SAES-J-002,

4.3.2

The selection of process flow instrumentation systems shall consider the following: Application suitability, Reliability, Turndown ratio, Required Accuracy, Operability and Maintainability.

4.3.3

If operation requirements dictate high accuracy measurements, custody quality meters shall be considered with pressure, temperature and composition compensations. In addition, the calculations shall be carried out in dedicated flow computers per applicable AGA Reports 3, 8 and 9.

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

Commentary Note: Examples of these high accuracy meters include flow meters installed on lines feeding to the master gas grid or on the take-off points for internal company fuel consumptions.

4.4

Data and Sizing 4.4.1

Saudi Aramco ISS form  form 8020-113-ENG  8020-113-ENG shall be used for DP flow transmitters. ISS form  form 3175-ENG 3175-ENG  and  and 8020-115-ENG 8020-115-ENG  shall be used for Orifice Plate and Flanges. ISS form  form 8020-116-ENG 8020-116-ENG  shall be used for Venturi Tubes. ISS form  form 8020-117-ENG 8020-117-ENG  shall be used for Turbine Flow Meters. ISS form  form 8020-118-ENG 8020-118-ENG  shall be used for Positive Displacement Flow Meters. 6078-ENG  shall be used for other flow meters. ISS form  form 6078-ENG

4.4.2

Calculations shall be attached as an additional sheet(s) to the specification sheet.

4.4.3

Software sizing of orifices shall be with calculations in accordance with ANSI-2530/API-14.3/AGA-3. ANSI-2530/API-14.3/AGA-3. InstruCalc or The Flow Flow Consultant  by R.W. Miller sizing software may be used.

4.4.4

Nozzle, venturi, and other differential pressure device calculations shall  be in accordance accordance with with Flow  Flow Measureme Measurement nt Engineering Engineering Handbook  Handbook .

4.4.5

For other proprietary meters, the manufacturer’s sizing and calculation methods shall be used.

4.4.6

In general, differential pressure type flow instruments should be sized such that normal flow is between 65% to 80% of design maximum.

4.4.7

Square root extractions in calculating flows from differential pressure  based flow meters shall only be performed in one location either in the transmitter, flow computer, or preferably in the control system.

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

5

SAES-J-100 Process Flow Metering

Installation Requirements 5.1

Instrument Piping and Tubing 5.1.1

A line class root or isolation valve shall be provided at each process connection. Piping from taps to this first root valve shall be specified and provided by the piping discipline. Exception: Closed coupled instrument mounting systems and special manifolds that combine piping and instrument valves maybe used with prior written approval of Supervisor, Instrumentation Unit, P&CSD.

5.1.2

Instrumentation tubing shall follow  follow SAES-J-003 SAES-J-003.. 

5.1.3

Orifice flanges are to be weld-neck with an internal bore to match the internal diameter of the pipe. Any distortion resulting resulting from the butt weld shall be removed and ground flush with the inside diameter of the  pipe. Orifice flanges up to 24 inches shall be in accordance with  ASME B16.36 and and ANSI  ANSI 2530/API 14.3/AGA-3. Orifice flanges larger than 24” can be based on ASME on  ASME B16.47.  B16.47. 

5.1.4

When piping is used for process connections, the piping and flange specifications and installations shall follow the relevant piping standards. From the root valve to the instrument, instrument, the instrument pipi piping ng specification, material of construction, pressure rating, fittings, and valves shall meet or exceed applicable piping specifications for the  process service. Orifice flanges shall be rated at a minimum of ASME/ANSI Class 150.

5.1.5

For liquid and steam services, pressure taps shall be located on the horizontal side of the piping or up to 45 degrees down from horizontal. The impulse lines shall be sloped downward approximately 1:12 toward the transmitter.

5.1.6

For gas and vapor services pressure taps shall be located on the vertical from the top of the piping, or up to 45 degrees ffrom rom top. The impulse lines shall be sloped downward approximately 1:12 toward the process connections.

5.1.7

All parallel pipe lines with adjacent orifice flanges or orifice fittings shall have a minimum spacing of 300 3 00 mm (12 in) between flanges outside diameters if horizontal taps are required. In addition, they shall  be staggered so that no two pairs of orifice flanges (centerline to Page 6 of 12

 

Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

centerline) are less than than 1 m (3 ft) apart. Where this spacing is not  possible or practical, taps may be reoriented per Standard Drawing AD-036004..  AD-036004 5.1.8

Interconnecting impulse tubing between a differential flow element and a transmitter shall be limited to a maximum max imum length of 6 m (20 ft) for flow meters used in control loops. Interconnecting impulse tubing  between a differential flow element and a transmitter in compressor suction service shall be kept as short as possible. po ssible.

5.1.9

Remote seals shall be used in lieu of impulse tubing for corrosive, volatile, dirty fluids and applications that may cause impulse line  blockage. Seal fluids, when used, shall be suitable for external ambient conditions.

5.2

Meters in liquid service shall be installed so that meters are always full of liquid and trapping of gases is avoided. In gas service, service, liquid trapping shall be avoided.

5.3

Flow measurements requiring temperature compensation thermowells shall be located between 5 to 20 nominal pipe diameters downstream of the meter.

5.4

Unless otherwise required by the process or piping specifications, orifices, flow nozzles, pitots and flow conditioners shall be 316 stainless steel as a minimum.

5.5

Flow conditioners shall not be used if the meter is followed by rotating process equipment (compressors, pumps, turbines, etc.) that can be damaged d amaged if a part of the conditioning device breaks off and enters the equipment.

5.6

The use of strainers and air eliminators shall be considered to protect metering devices when performance or integrity is compromised without such protection.

5.7

Orifice Meter 5.7.1 Flange taps shall be used for all orifice meter installations. The tap connections for sizes up to 24 inches shall conform to Standard Drawing  AC-036413  Drawing AC-036413 or  AB-036414. AB-036414.  5.7.2

Paddle type orifice plates shall be used where raised face orifice flanges are used.

5.7.3

AB-036094..  The orifice plate shall be fabricated per Standard Drawing  Drawing AB-036094 Commentary Note: The orifice plate dimensions / tolerances and bevels shown on Standard Drawing  AB-036094   AB-036094 are based on the guidelines of API MPMS 14.3.2.

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

5.7.4

Orifice bore beta ratios shall be between 0.20 and 0.70. However, for orifice plates in 24 inches and larger pipelines that require low pressure losses, a beta ratio of 0.75 is acceptable.

5.7.5

Appendix 1 1  shall be used for straight run requirements. Coulomb A is intended for high accuracy measurements and coulomb B is intended for regulatory flow control and monitoring. For new orifice orifice plate installations, a beta ratio of 0.75 shall be assumed when determining the minimum length of straight piping required. Commentary Note: Integral orifices may be used in case the meter size is less that 2” and shall be in accordance with manufacturer’s recommendations.  recommendations.  

5.7.6

5.8

5.9

Flow Nozzles 5.8.1

In high pressure (1000 psig or higher) applications, the flow nozzle shall  be welded welded directly directly into the pipe pipe and and a flange flanged d drop drop out out sspool pool section section shall shall  be provid provided ed upstr upstream eam of the the flow flow nozzle nozzle for for inspec inspection tion and main maintenan tenance. ce.

5.8.2

Pipe sections for the installation of flow nozzles shall be stamped with the Instrument Tag Number of the element, the element location in the  pipe, the pipe internal diameter and the direction of flow.

5.8.3

Minimum straight run pipe length requirements shall be in accordance with ISO 5167-3.

Venturi 5.9.1 Fabrication and calculations of Venturi meters shall be in accordance to ISO 5167-4. 5.9.2

5.10

When the static pressure compensation is required, the connection shall  be derived from the orifice meter downstream pressure tap.

Minimum straight run pipe length requirements shall be in accordance with  Appendix 2 with 2.. 

Turbine Meter 5.10.1

Viscosity compensated turbine meters shall not be used.

5.10.2

All turbine meters and their installations shall comply with 34-SAMSS-117.  34-SAMSS-117.

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

5.11

5.12

5.13

5.14

SAES-J-100 Process Flow Metering

Positive Displacement Meter 5.11.1

Positive displacement type meters shall comply with  with 34-SAMSS-118 34-SAMSS-118.. 

5.11.2

Positive displacement meters shall be sized to operate between 30% and 80% of the upper range value of the nameplate rating.

Averaging Pitot Element 5.12.1

For a removable element, the process valve shall shall have the proper inside diameter to allow allow passage of the element. The valve shall meet applicable piping specifications.

5.12.2

Manufacturer’s installation recommendations shall sha ll consider element deflects and vibration in large diameter pipes or ducts du cts or if high flow velocity.

5.12.3

Pitot Elements shall only cleanpurge noncritical services. In addition, elements shallbebeinstalled providedinwith capability.

Ultrasonic Flow Meter 5.13.1

In-Line Ultrasonic Flow Meters may be used provided that the vendor is selected from  from SAES-J-002 SAES-J-002..  For emergency shutdown services and for clamp-on type, P&CSD/PASD/IU pre-approval is required. Clamp-on ultrasonic meters shall not be allowed for permanent installation and new pipe construction.

5.13.2

In insertion type meters, transducer location and alignment of the nozzles shall be per meter manufactur er’s er’s recommendation.  recommendation. 

5.13.3

Ultrasonic Flow Meter shall have integral extraction mechanism to facilitate easy online cleaning or replacement of the transducers when required such as in dirty gas and flare service.

Flow Switches Vane (paddle) type flow switches shall not be used.

5.15

Transmitters and Indicators 5.15.1

Transmitters shall be smart.

5.15.2

Field instruments (transmitters, indicators, etc.) shall be installed in an accessible location with centerline 1.4 m (nominal) above grade or  platform and as close as possible to the flow element. Page 9 of 12

 

Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

6

SAES-J-100 Process Flow Metering

5.15.3

Differential pressure transmitters (unless close coupled) and bellows type meters shall not be installed on process piping but on a separate instrument stand or column. A 3-valve or 5-valve manifold close coupled to the instrument shall be used.

5.15.4

Multivariable smart transmitters may be used for Temperature-Pressure compensated flow loops whenever possible.

Inspection Requirements Pressure retaining instruments shall be tested, examined and qualified as specified in 34-SAMSS-010  in addition to the established manufacturer tests and applicable industry 34-SAMSS-010 standard requirements.

13 October 2013

Revision Summary Major revision.

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

Appendix 1 Minimum Straight Run Lengths for Orifice Plates without Flow Conditioners in Accordance with ANSI/API (ISO 5167-2)

NOTES:

 

S is the separation between the two bends measured from the downstream d ownstream end of the curved portion of the up upstream stream bend to the upstream end of the curved portion of the downstream bend.

 

Column A for lengths corresponding to “zero additional uncertainty” values

 

Column B for lengths corresponding to “0,5 % additional uncertainty” values values  

 

For additional information refer to ISO-5167-2 for Orifice Plates

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Document Responsibility: Instrumentation Standards Committee Issue Date: 13 October 2018  Next Planned Update: 13 October 2018

SAES-J-100 Process Flow Metering

Appendix 2 Minimum Straight Run Lengths for Classical Venturis in Accordance with ANSI/API (ISO 5167-4)

NOTES:

 

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Downstream straight lengths is 4D for zero additional uncertainty and 2D of 0,5 0 ,5 % additional uncertainty a

 The radius of curvature of the bend shall be greater than or equal to the pipe diameter.

 b

 Column A for lengths corresponding to “zero additional uncertainty” values. values.  

c

 Column B for lengths corresponding to “0,5 % additional uncertainty” uncertainty” valu values. es.

d

 The straight length in Column A gives zero additional uncertainty; data are not available for shorter straight lengths which could be used to give the required straight lengths for Column B.

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