SAMSUNG SEM-3069E Compressor & Turbine Piping Design Standard_2
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Descripción: SAMSUNG SEM-3069E Compressor & Turbine Piping Design Standard_...
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REV. :
3
DATE :
2004 2004. . 08. 08. 20
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Compressor Compressor & Turbine Turbine Surroundin Surroundings gs Piping Piping Design Design Standard Standard
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Table of Contents
Page 1. Gene Genera ral l 1.1 Purpos Purpose e 1.2 Scope Scope
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1.3 Refere Reference nce
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2. COMPRE COMPRESSO SSOR R Genera General l 2.1 Compre Compresso ssor r Types Types and Ch Chara aracte cteri risti stics cs
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2.2 Compre Compresso ssor r Compar Compariso ison n 3.
COMPRESS COMPRESSOR/T OR/TURBI URBINE NE LAYOUT LAYOUT 3.1 Layout Layout Gener General al
3.2 Compre Compresso ssor r House House Layout Layout 3.3 Instal Installat lation ion He Heigh ight t
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3.4 Operat Operation ion & Mainte Maintenan nance ce
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4. Piping Piping LA LAYOU YOUT T 4.1 Compre Compresso ssor r Connec Connectin ting g Pipe Pipe 4.2 Turbin Turbine e Connec Connectin ting g Pipe Pipe
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4.3 Oil System System Connec Connectin ting g Pipe Pipe
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4.4 Strainer Strainer Installa Installation tion -----------------------------------------------------------------------------------------------
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4.5 Expans Expansion ion Jo Joint int In Insta stall llati ation on
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5. NOZZLE NOZZLE Load Calculation Calculation Procedure Procedure & Consideration Consideration 5.1
Stan Standa dard rd
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5.2 Calculat Calculation ion & Review Review Procedur Procedure e 5.3
Conside Considerati ration on
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Compressor Compressor & Turbine Turbine Surroundin Surroundings gs Piping Piping Design Design Standard Standard
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Table of Contents
Page 1. Gene Genera ral l 1.1 Purpos Purpose e 1.2 Scope Scope
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1.3 Refere Reference nce
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2. COMPRE COMPRESSO SSOR R Genera General l 2.1 Compre Compresso ssor r Types Types and Ch Chara aracte cteri risti stics cs
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2.2 Compre Compresso ssor r Compar Compariso ison n 3.
COMPRESS COMPRESSOR/T OR/TURBI URBINE NE LAYOUT LAYOUT 3.1 Layout Layout Gener General al
3.2 Compre Compresso ssor r House House Layout Layout 3.3 Instal Installat lation ion He Heigh ight t
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3.4 Operat Operation ion & Mainte Maintenan nance ce
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4. Piping Piping LA LAYOU YOUT T 4.1 Compre Compresso ssor r Connec Connectin ting g Pipe Pipe 4.2 Turbin Turbine e Connec Connectin ting g Pipe Pipe
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4.3 Oil System System Connec Connectin ting g Pipe Pipe
9 11
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4.4 Strainer Strainer Installa Installation tion -----------------------------------------------------------------------------------------------
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4.5 Expans Expansion ion Jo Joint int In Insta stall llati ation on
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5. NOZZLE NOZZLE Load Calculation Calculation Procedure Procedure & Consideration Consideration 5.1
Stan Standa dard rd
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5.2 Calculat Calculation ion & Review Review Procedur Procedure e 5.3
Conside Considerati ration on
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6. PIPING PIPING SUPPOR SUPPORT T 6.1 Compre Compresso ssor/ r/Tur Turbin bine e Suppor Support t Genera General l
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6.2 Suppor Support t Consid Considera eratio tion n by Comp Compres ressor sor -------------------------------------------------------------------
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6.3 Consid Considera erati tion on by Suppo Support rt Type Type
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6.4 Struct Structure ure Streng Strength th by Suppor Support t
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7. Work Work Activi Activity ty by De Desig sign n Phase Phase 8. Revis Revision ion Hi Histo story ry
APPENDIX Ⅰ. Compress Compressor or Pipe Fixed Point Point Selectio Selection n Method Method Ⅱ. Compressor Compressor Pipe Construction Method(SAMPLE) Ⅲ. Referenc Reference e Plot Plan (MOP, (MOP, GSP-5, GSP-5, PEMEX-Tu PEMEX-Tula, la, IOCL) IOCL)
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1. General 1.1
Purpose This Manual aims to reinforce and standardize the Piping Layout (Incl Supports) for Compressor /Turbine systems for oil refinery and Chemical Plants designed by SECL.
1.2
Scope This Manual applies to large Compressor/Turbine Piping of all plants to be implemented by SECL. For Any Disparity With The Client Spec, the latter shall prevail.
1.3 Reference 1.3.1
SEM-2002E
"Plant Layout Standard"
1.3.2
SEM-3002E
"Piping Design Instruction"
1.3.3
SEM-3039E
"Piping Design Standard"
1.3.4
SEM-3040E
"Pipe Support"
2. COMPRESSOR General 2.1 Compressor Types and Characteristics 2.1.1
Centrifugal Compressor It uses a rotating disk or impeller in a shaped housing to force the gas to the rim of the impeller, increasing the velocity of the gas. It comes usually in Package Type, and is composed of Inter-cooler, After-cooler, Lube Oil System, Seal Oil System, Surface Condenser, Automatic Control,etc. Motor or Turbine is used as Driver and its advantage is that Oil-free air/gas is supplied.
2.1.2
Reciprocating Compressor The intake gas enters the suction manifold, then flows into the compression cylinder where it gets compressed by a piston driven in a reciprocating motion, and is then discharged. It is composed of Lubricated Type and Non-lubricated Type. Non-lubricated Type is used for Instrument Air. It is used for capacity of Air below 30 N㎥/min
and
discharge Pressure(max. 50,000 Psi.a). 2.1.3
Screw Compressor It is a type of gas compressor which compresses gas in rotor cavity and achieves
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pressure. It is capable of achieving pressure range around 7.0 ~ 8.5 Kgf/㎠. It is not suitable for high pressure. 2.2 Compressor Comparison Screw Compressor
Reciprocating Compressor
Type
Rotary Small, Light
Low Speed Reciprocating, Large
Consideration
screw
reciprocating
Efficiency
low volumetric efficiency
high volumetric efficiency
Stepless Capacity Control is
Step by Step Capacity Control Feature (100, 75, 50, 25%)
Capacity Control
possible in On-load/Off-load type partial load Feature (100-0%)
Mechanical Friction
No effect on efficiency as Mechanical Friction only in Bearing
Friction can occur in part of Piston, Piston Ring, Rod, Cylinder, Rod Packing, Efficiency decreases with friction. Damage of Valve, Plate & Spring due to
Operating Valve
No
Pulse
Less
More
Vibration
Less
More
Noise
easy to find measures for hard to take measures for soundproofing soundproofing due to high frequency due to low frequency noise noise
Motor
Suction Valve, Discharge Valve
Power Factor, efficiency is good
Power Factor, efficiency is poor due to
due to high speed motor (small
low speed motor (large size)
size) Base
Small
Installation Space
Compact
Credibility
good
large
Durability
large poor due to friction, damage of operating valve great care is to be taken due to noise,
Operation Pressure Range
simple, remote control possible
temperature, pressure. difficult to find
limited
damage on friction part and valve. High pressure possible
[reference] lecture, Machinery Design Ⅰ "Rotary Machinery"
3. COMPRESSOR/TURBINE LAYOUT
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3.1 Installation General 3.1.1 Should be installed near Road for an easy access to Mobile Equipment for Maintenance.as per requirements of layout. 3.1.2 Layout shall be as per Regulations of Oil, Noise, Fire Fighting & dangerous object, etc.
3.1.3 Requirement of Compressor Shelter or Room shall be as per below:
Type
Climate Condition
Outdoor Type
Warm Zone
Open Below Type
Tropical Zone
Enclosure Type
Extreme Cold Zone
Other Condition
Note
Danger of Explosion is expected due to Process Fluid Leak No Danger from Process Fluid Leak
3.2 Compressor House Layout Compressor House Layout is to be selected in consideration of of each House Layout as below. See
Plant Overall Layout and Features
SEM-2002E "PLANT LAYOUT Standard" Appendix Ⅴ as Compressor
Layout Reference. 3.2.1
Short Rectangle (Parallel Arrangement) (1)
It is easier to manage if Compressor comes in multiple.
(2)
Less Number of Columns
(3)
There is less room in case of more than 3 of compressor, compressor / turbine & annexed device (Condenser, Cooler, Separator, Lube & Seal Oil System )
(4)
Cost would increase due to Width Extension of Traveling (or Overhead) Crane & Architecture
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[Figure 3-1] Short Rectangle Compressor House 3.2.2
Long Rectangle (Series Arrangement) (1)
Architecture Area can be made smaller in case less than 3 of Compressor.
(2)
It is easy for Condenser Arrangement & Installation, Piping Plan.
(3)
It reduces the Width of Traveling Crane & Architecture.
(4)
For warm climate with less rainfall Lube &
Seal Oil System is usually installed
outside. (5)
Architecture would result in a narrow and long shape so is susceptible to Area when the overall Plant is set in place.
[Figure 3-2] Long Rectangle Compressor House 3.2.3 L-Shape Type (1) Compressor layout can be arranged conveniently around Building (2)
It could be functional from the viewpoint of integrated Arrangement.
(3)
Drop Area will be in 2 places, transportation vehicles should be accessible to both drop areas.
(4)
2 Traveling Cranes would be installed.
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[Figure 3-3]
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L-Shape Type Compressor House
3.3 Installation Height Generally Installation Height, Configuration, etc. is to be based on the requirements of Compressor Vendor. But, Final Installation Height of Compressor is to be decided after review thoroughly each Height of the below items required by Compressor Type. 3.3.1
Centrifugal Compressor (1)
Min. Straight Run Requirements of Compressor Inlet Pipe
(2) NPSH Requirements of Vertical Condensate Pump (3)
Slope Requirements of Lube Oil, Seal Oil System Location and Pipe
(4)
Maintenance Space Height of Annexed Device such as Condenser, Lube & Seal Oil System
(5)
Overhead Clearance
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[Figure 3-4] Centrifugal Compressor Installation Height Consideration 3.3.2
Reciprocating Compressor (1)
Install overall as close to ground as possible to minimize Piping Vibration
(2)
Sleeper Height (Usually 300 ~ 450mm) & Piping Support Type
(3)
Pulsation Dampener Size
(4) Minimum Distance between Beam Size & Dampener for Operating Platform
[figure 3-5] Reciprocating Compressor Installation Height Consideration
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3.4 Operation & Maintenance Space 3.4.1 Floor & Platform (1)
It is to be easy for Plant Operator to reach and operate Valves, Switches, Control Panel instruments.
(2)
Appropriate Number of Doors, Stairs and Ladders are to be installed to evacuate in case of emergency.
(3)
Floor Level around Compressor is to be arranged on the basis of Top of Common Header as
(4)
[Figure 3-6] "Top Style"
Floor Standard according to Device Arrangement in Compressor House is to be based on 5.2.4 of SEM-2002E "Plant Layout Standard"
Top Style (preferred) [Figure 3-6]
Bottom Style Floor Arrangement Style around Compressor
3.4.2 Traveling Crane (1)
Compressor, Turbine is to be arranged within Operation area of Traveling Crane Run
(2)
Running Range of Crane is to be designed for loading in Truck directly from Traveling Crane. That is, Travel Crane is to be extended upto Lay-down Area(or Drop Area).
(3)
Traveling Crane Installation Height is to be decided after review the below items thoroughly. 1)
As per Requirement by Compressor Vendor (maximum priority)
2)
The Max. Size among Compressor/Turbine Parts(Casing Cover, Turbine Soundproof Cover, etc.)
3)
The Max. Size
among the upper connecting Pipes of devices to be dismantled (to
the part where Break Flange is installed) 4) Basic Length from Rail to Hook for Crane
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(4) Generally Removal Space of Compressor/Turbine Top is to be considered 3 ~ 4 times of its Height. But, decide based on item (4) and [Figure 3-7] & [Table 3-1] in case Specific Information of (3) is not available.
[Figure 3-7] Traveling Crane Installation Height
[Table 3-1]
Travel Crane Installation Height (Reference) Type
H1
H2
3.4.3
Height for Reference
Small Compressor
4.0 m
Medium Compressor
5.0 m
Large Compressor
7.0 m
20 ton
2.6 m
30 ton
2.8 m
40 ton
3.0 m
Note
Span: Max. 26m
Condenser, Cooler, Condensate Pump (1) In case they are to be installed at the bottom of Compressor Deck, Make provision for Installation & Removal.
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(2) Provide Space for Cooler Tube Bundle Maintenance (3) In case Condensate Pump is Vertical Type,Ensure Space for Shaft. 3.4.4
Lube & Seal Oil System (1) It has to be accessible from Road and, and it should be at convenient place to install and load. (2) It is to be installed on the 1st Floor adjacent to Compressor to meet Gravity Flow Requirements. (3) If Compressor House is closed type, Upper Floor (2nd F) of Oil System Installation should be of removable type (Grating) for Maintenance. (4) Control Panel and Piping shall not to be installed in Grating Area of the above(3). (5) Oil Console to be installed such that Traveling Crane can be used in case of Maintenance. (6) Access for Filter Element to be provided. (7) Pathway for Operation (Width Min. 800) is to be ensured enough around Oil Console. (8) Seal Oil Head Tank is to be installed in the place where it is not interfering with Traveling Crane Operation. (9) Seal oil head tank are to be installed outside of Compressor House in case there is no problem of Freezing or when the Capacity is above 2 ton. (10) Installation Height of Seal Oil Head Tank is to be complied with Vendor's requirements. (11) Installation Height of Oil Trap is to complied with Vendor's requirements.
3.4.5
Drop Area (1) It is to be the place where truck can have an easy access and direct unloading/loading from Road. (2) Drop Area is to be designed within operating area of Traveling Crane. (3)
Drop Area Section is to be based on the max. Size of the below items. 1)
Compressor or Turbine Removal Part Size
2)
Casing Cover or Turbine Soundproof Cover Size
3)
Cylinder Size (Reciprocating Compressor)
4)
The Max. Size
among the upper connecting Pipes of devices to be dismantled
3.4.6 Control Panel (1) Compressor House is to be installed close to outer wall in order not to interfere Compressor Operation and Maintenance. (2) Min. 2m Space is to be ensured in front of Control Panel for operation.
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4. Pipe LAYOUT Pipe connecting to Compressor or Turbine is to be installed in order of High Temperature, Large Bore, Heavy-wall. Detailed Standard by Pipe Type is be based on the below. 4.1 Compressor Connecting Pipe 4.1.1
Suction Pipe is to be designed as short
4.1.2
A Min. of
and as direct as possible.
2D (D: Diameter) Straight Run of same size as of suction Nozzle is to be ensured
for even flow. But, if Vendor Requirement is available, then, this shall be taken up at priority. 4.1.3
In case Tee is used instead of Elbow in Suction Nozzle, Min. 6D of Straight Run is to be ensured. But, again Vendor Requirement shall govern.
4.1.4 In case Injection Nozzle is to be installed in Vertical Straight Run right before the Suction Nozzle as per Straight Run shall be from the Nozzle to injection nozzle weld point.
[Figure 4-1] Suction Pipe Minimum Straight Run 4.1.5 Avoid using Tee, Short Radius Elbow & Direction Change Fitting as much as possible in Suction/Discharge Lines. 4.1.6 Be sure to install Break Flange for Dismantlement and Alignment of Compressor. 4.1.7 In case By-pass Pipe for Minimum Flow connecting Suction and Discharge, install Pipe and Support to minimize vibration generated by Pressure Difference.
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[Figure 4-2] Minimum Flow By-pass 4.1.8 In case Check Valve is to be installed in Discharge Pipe according to Process Requirement, it is to be installed as close to Nozzle as possible. 4.1.9
Check Valve (Non-slam, etc.) in Discharge should indicate Pressure Drop, ΔP clearly in Special Part Data Sheet.
4.1.10
Low Point or Pocket shall be designed to minimize Condensate formation.
4.1.11 In Suction Pipe Pocket, Drain Valve is to be installed close to Equipment Nozzle. 4.1.12 In case Valve Body is Low Point according to overall Pipe Arrangement, Drain Valve is to be installed to Valve Body. 4.1.13 In case Suction Pipe is branched from Main Header, branch shall be from top of Main Header to prevent Condensate Flow to compressor/turbine.
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[Figure 4-3] Branch Method & Drain Installation Standard 4.1.14
Provide permanent or temporary Strainer in Suction Pipe to protect Compressor.
4.1.15 Valve, Chest & Casing Drain Nozzle Connecting Pipe installed in Compressor is to be connected to individual Drain Funnel. 4.1.16
Maintenance Area not to interfere with Strainer Screen Installation and Removal.
4.1.17
See No.6 for Compressor Connecting Pipe Support Design.
4.2 Turbine Connecting Pipe 4.2.1 Break Flange is to be installed if necessary in consideration of Device Dismantlement in case of Turbine Connecting Steam Pipe. 4.2.2 Main Valve of Suction Steam Pipe is to be installed adjacent to Turbine as close as possible for access to instrument and equipment while operating. 4.2.3
Decide Installation Location of Main Valve according to Operation Condition (Solo-run, Warming-up, etc.).
4.2.4 Install Steam Trap at Pocket in Suction Steam Pipe. 4.2.5 Discuss with Process if Steam Trap is necessary in case Suction Pipe to Turbine Nozzle is
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without Pocket but Straight length is too long. 4.2.6 Install Steam Trap right before Vertical Pipe to Turbine Nozzle (as shown in [Figure 4-4]) with Drip Pot to prevent Condensate flow.
[Figure 4-4]
Drip Pot Installation Method
4.2.7 See related Specification and SECL Pipe Hand Book(Sheet No.5-21) for Drip Pot Configuration and Detailed Size. 4.2.8 Be sure to design Steam Pipe connected to Turbine by "ㄷ", "ㄹ" on the basis of equipment to minimize Thermal Stress affecting Nozzle. 4.2.9 Design Steam Pipe connected to Turbine to prevent any problem in case of Steam Blow-out. 4.2.10 See No.6 for Turbine Connecting Pipe Support Design 4.3 Oil System Connecting Pipe 4.3.1 Be sure to comply with Slope Requirement with Compressor Vendor or P&ID. 4.3.2 Be sure not to arrange Oil Pipe at top of Steam line or other high temperature Pipe to
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prevent Fire. 4.3.3 Be sure to check Temperature Maintenance Requirement by Steam Tracing in Lube & Seal Oil System. 4.3.4 Be sure to design foreign matter not to pile up at welding part by using Butt Welding Fitting in case of small bore Pipe. 4.3.5 Be sure to arrange Pipe for Chemical Cleaning & Oil Flushing. 4.3.6 Be sure to install Break Flange at an interval of every certain length in case of cleaning Pipe by Wash Vessel. 4.4 Strainer Installation Be sure to install near Suction Piping Nozzle for the purpose of damage prevention of Compressor, Impeller or Blade of Turbine, and Branch Pipe, Temperature Indicator, Pressure Gauge, etc is not to be installed in the lower part of Strainer. 4.4.1 Temporary Type
[Figure 4-5] Temporary Type (1)
Be sure to install spool piece with Flange as [Figure 4-5] for Installation and Maintenance of Cone Type Strainer.
(2)
Generally over 400LB Pipe is not followed Flange.
(3)
Be sure to consider Support not to interfere Compressor Alignment in case of Piece Removal for Strainer
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Low-Pressure T-Type (1)
It is generally applied to Low pressure Pipe of below 300LB.
(2)
Make sure that it does not effect Compressor Alignment in case of Strainer Maintenance.
[Figure 4-6]
Low Pressure T-Type
4.4.3 High Pressure T-Type (1)
It is generally applied to High pressure Pipe of above 400LB.
(2) Relatively it requires small Strainer Maintenance Area. (3)
Provide Drain Valve as Double Block in case of High Pressure(above 600LB) as per Process Requirement.
[Figure 4-7] High Pressure T-Type
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4.5 Expansion Joint Installation 4.5.1 Expansion Joint can be used for inadequate Flexibility for large bore Pipe of Suction Side. comply with Client's or Process Requirements. 4.5.2
Normally Expansion Joint is used with Transition Piece in Turbine and Condenser Connecting Pipe.
4.5.3 Refer EJMA Standard or ANSI/ASME
B 31.3 Appendix X for Bellows Pressure and Life Span
Calculation.
5.
NOZZLE Load Calculation Procedure & Consideration 5.1 Standard [Table 5-1] Code Standard Type
Stnadard
Note
Centrifugal Compressor
API STD 617 (NEMA X 1.85)
Size or Formula by Vendor is to be
Turbine
NEMA SM-23
taken a priority.
5.2 Calculation and Review Rocedure 1. Criteria for Allowable Nozzle Force , Moment Standard 1. 허용 외 력 , M om e nt 적 용 규 격
[Vendor Data Submit Request] [ Ve nd or provides Da ta 제 출basic 요 구 Design ] -SECL
Nozzle Size 2. 2.Nozzle Size 3. Nozzle 이동량 3. Nozzle Movement 4 . N o zz le 위 치 , 상 대 관 계 4. 5Nozzle Location, Alignment . 기 타 특 기사 항
- 기 본 설계조 건은 당사 제공 Standard (Ambient Temperature, ( 외 기 온 도 , 운 전온 도 등 )
Operating Temperature, etc.)
5. Other Spec.
Thermal Stress Analysis C om p ut er 에 의 한 by Computer 열 응력 해석
1. Review 구속점, Method Change Allowable 허용치 대 비 Review 검토 Value Ye s
Reflection to 설계 반영 Design
No
1. 구속점, 방법 변경검토
2.2 .Review 배 관 R Pipe ou te Route 변 경 검Change 토 3.3 .Review Equipment Layout Change 기 기 L ay ou t 변 경 검 토
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5.3 Consideration 5.3.1 Base Temperature for Pipe Expansion Calculation is as below and Vendor should provide Nozzle Thermal Movement. (1)
Pipe of Normal Operating Temperature is over 0℃: lowest average Temp. of ambient temp.
(2)
Pipe of Normal Operating Temperature is below 0℃: Highest average Temp. of ambient temp.
5.3.2 It is usually safe to apply installation temp.(ambient average temp.), be sure to review actual condition in case it is extremely cold or Compressor House is Enclosure Type. 5.3.3 Be sure not to use Cold Spring or Counter Weight in order to reduce reaction force of Compressor, Turbine Nozzle, or adjust Support Load. 5.3.4 Be sure to consider appropriate measures in case of the below load condition. [Table 5-2]
Measure according to Load Condition Load Condition
Measure Support Distance around Nozzle & Balance
Piping Weight and Bending by Weight Adjustment Spring Load Balancing Rod, Turnbuckle Style Application Friction force from Support
Use Teflon in
Resting Support (Friction factor
reduction)
6.
Spring Hanger Variability
approx. 5%, If variability load is over 100kg, Adjustment in Site is required.
Piping Welding, installation tolerance, Welding Distortion
Thorough Construction & Alignment Management
Settlement
Equipment & Support Common Foundation, Separate Foundation for Support
PIPING SUPPORTS 6.1 Compressor/Turbine Support General 6.1.1 Be sure to review by Computer from the basic Design Stage and not only Support Structure Type, & Installation Method but also Civil/Architecture Information in detail at the same time. 6.1.2
Give Civil/Architecture Information clearly, and provide for Design Adjustment.
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6.1.3 Be sure to consider Loading Data for Hydro Test, Insert Plate Configuration & Allowable Deflection of Structure
for Support
6.1.4 While selecting Hanger Type, consider affect by of Friction force. 6.1.5 Be sure to design to be able to adjust Support around Nozzle in each direction of X, Y, Z
because Pipe is to be adjusted in case of Nozzle Alignment.(Use adjustable supports if
reqd.) 6.1.6 Be sure to use Support of which structure is simple and fabrication and installation is easy but do not to use Support Type as [Figure 6-1] in
Compressor, Turbine Pipe.
[Figure 6-1] Support Type not to use 6.2 Support by Compressor Consideration 6.2.1
Centrifugal Compressor (1) Compressor,Turbine Connecting Pipe is to be supported in House Floor or Structural Member. (2)
In case Compressor, Turbine Connecting Pipe is not connected by break-up Flange for Alignment, Design Support to minimize deflection by Piping Weight.
(3) Consider Support and Bracing for Vibration Prevention or Shock Absorption (4)
Support Load, Welding, Hole drilling is prohibited in on Compressor, Turbine body or bed.
6.2.2
Reciprocating Compressor (1)
Support adjacent to Compressor Nozzle is to be installed on Separate Foundation for Support (not Equipment foundation or Structure) or Concrete Sleeper.
(2) Install Hold-Down Support for Vibration in Suction/Dicharge Pipe. 6.3 Consideration by Support 6.3.1
Spring (Hanger) Support (1) Use Spring Support to minimize Load and Moment transmitted to compressor/Turbine
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Nozzle. (2)
Design Spring Support around Nozzle by putting hanger in two locations as [Figure 6-2] or Base Type to prevent misalignment.
[Figure 6-2] Support Installation for Alignment (3)
Spring Support Load Calculation is to be based on Computer Analysis, See SEM-3040E for Calculation.
(4)
Use Variable Type as much as possible and use Constant Type in case movement is large and influence on Nozzle is more.
(5)
Base Type is not usually used but be sure to reduce Friction by using Sliding Plate like Teflon or Graphite Pad if necessary.
(6)
Use Hanger Type to reduce Horizontal Force & Moment which is transmitted to Friction Force and Nozzle.
(7)
Sway Strut can also be used to reduce Nozzle Load by reducing Friction Force (See Fig 6-3)
[Figure 6-3]
Sway Strut & Sliding Plate Installation
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(8)
Compressor & Turbine Surroundings Piping Design Standard
Enhance Accuracy of Stress Analysis
20
24
and Load Value by using Trunnion Weight for
Spring Load Calculation. 6.3.2 Directional Stop (DS) (1)
Design as the structure of function and role identical to Input condition in case Stress Analysis.
(2)
Rod Turnbuckle Style is selected based on Directional Stop Function as required by Stress Analysis. Another advantage is that Fabrication and Installation is comparatively simple.
(3)
Turnbuckle Style as Left of [Figure 6-4] is to be applied because Guide Style as right of [Figure 6-4] Guide
doesn't conform with Restraint Purpose due to Friction
Force, Fabrication and Installation Tolerance, etc.
Turnbuckle Style
(Preferred)
[Figure 6-4] (4)
Guide Style
Turnbuckle & Guide Style
Attachment to cause Elastic deformation by heat like Clamp can't be used for the purpose of Direction Stop. Use only Lug Plate(or Rib Plate) is attached directly to Piping as [Figure 6-5] and Reinforcing Ring is attached to Clamp in addition.
Clamp Type - DO NOT USE [Figure 6-5]
Lug Type - CAN BE USED Clamp & Lug Type
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Compressor & Turbine Surroundings Piping Design Standard
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Even if Directional Stop is required in one direction,provide in both directions as [Figure 6-6].
Wrong Installation
Right Installation [Figure 6-6] (6)
Directional Stop Installation Method
In case Directional Stop is to be installed by using Trunnion, Provide reinforcement to prevent Elastic deformation of Trunnion as shown below.
[Figure 6-7] Trunnion Reinforcement Method (7)
IF Directional Stop is to be installed around Compressor, Turbine Nozzle as shown in [Figure 6-8]. Give Insert (or Corner) Plate & Information on Support Beam including Loading Data to Civil/Architecture in advance.
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Compressor & Turbine Surroundings Piping Design Standard
[Figure 6-8]
22
24
Directional Stop around Nozzle
6.4 Structure Strength by Support 6.4.1 Load shall be reflected in Civil/Architecture & Structure Design as shown
below. Be sure
to adjust Piping Support Location, Form, etc. if it exceeds the standard. (1) Allowable Vertical Load per Compressor Foundation (2)
Vertical & Horizontal load per Local Foundation
(3)
Load per Insert Plate
[Figure 6-9] Structure & Insert Plate Installation 6.4.2
Support Structure should have enough strength, be sure to send information on Allowable deflection within 1mm including Loading Data to person in charge of Civil/Architecture.
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Compressor & Turbine Surroundings Piping Design Standard
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6.4.3
Be sure to use Insert Plate, Anchor Bolt in case Support is to be fixed in Concrete.
6.4.4
Be sure to specify information on Loading Date, Material, Configuration, Installation Location
and Quantity
charge of
7.
23
of Insert Plate accurately on drawing and send it to person in
Civil/Architecture.
Work Activity by Design Phase Basic Plan & Layout (1) Job Contract & Client's Requirements (2) Process Flow Diagram
Planning Study (1) P&ID (AFP)
(1) P&ID (AFD or AFC)
(2) Line Schedule
(2) Final Approved DWG. of
(3) Equip.(Vendor) DWG.
(3) Compressor, Turbine Information for Piping Work
(Assembly DWG., Vendor
Requirements (4) Compressor annexed
P&ID)
(5) Electrical/Instrument, Civil/Architecture
Equip., Instrument, Valve (3) Foundation & Steel Structure Final DWG.
(4) Allowable Forces &
Equip. Arrangement, Height Location Drawing
Detail Design
Moments (5) Nozzle movement (6) Vendor Requirements (7) Electrical/Instrument,
Requirements
Civil/Architecture Information (8) Each Information
(1) Layout Study
(1) Completion of Piping
(1) Piping Design Drafting
(2) Compressor Room Size &
Work List of Basic Planning
(2) Piping ISO DWG. Creation
Configuration Decision (3) Information for
Piping Work & Check List
Phase
(if necessary Trunnion,
(2) Range and Standard
etc. Support reflection)
Traveling Crane Spec.
Decision of Thermal Stress
(3) Review by Check List
Decision
Analysis
(4) B/M Calculation
(3) Support location,
(5) Spring Load Calculation
Assembly, Dismantling
Installation Method Decision
(6) Support Detail Creation
Method
(4) Thermal Stress Analysis
(4) Equip. Loading,
(5) Piping & Electrical
Review Result, Allowance
/Instrument Cable Route and
Comparison (Force & Moment)
Space
(5)
(6) Machinery, Electrical
Information: (Insert, Loading
/Instrument Information
Data PF, Local FD'N , etc)
(7) Civil/Architecture
(6) Consider prospecting
Information
Civil/Architecture
problem in case of Site Piping Test (Break Flange, etc. )
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Compressor & Turbine Surroundings Piping Design Standard
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8. Revision History
No.
Date
0
1981. 7. 30
Page
Reason for Revision (1)
Establishment Process The Standard of Piping Design around Large Compressor was not available. It resulted in the the difficulty to standardize the consistency when it comes to Job execution. So SECL Manual is established according to Japan
(2)
TEC co. Bng'g Manual.
Department
:
Piping Team
Prepared by
:
Yoo Jae-ryong, Kim Ki-pil
Supervised by : 1
1998.5.10
-
Cheong Young-keun
Revision Process It is based on the Piping Team Manual Revision Plan.
It was revised and supplemented according to the error or items to be supplemented in the process of Job execution.. -
2
1998.10. 26
-
Department
:
Piping Team
Prepared by :
Lee Joo-sang
Reviewed by
:
Kim Ki-pil
Approved by
:
Lee Myung-hak
Revision Process It was based on Piping Team '98 Major Execution Plan.
-
3
2004.08.20
Whole Page
Department
:
Piping Team
Prepared by :
Chang Hong-jin, Lee Joo-sang
Reviewed by
:
Kim Ki-pil
Approved by
:
Lee Myung-hak
Revision Process It revised errors and deleted general explanation from the manual and it is revised and supplemented by practical method of actual job and contents recommended by reference.
-
Department
:
Piping Team
Prepared by
:
No Hee-kwon
Reviewed by :
Kim Chang-rae, Koo Young-hoe, Ahn Jun-hwan
Approved by
:
Kim Seok-ki
3069E 3 1
1
Piping Fixed Point Selection Method is as below to minimize Load and Moment to affect Compressor or Turbine Nozzle by connecting Pipe. But, be sure to receive the final approval from a person in charge of Stress Analysis in case it is to be applied to Actual Job Execution because the below is a simplified method. 1.
Fixed Point Selection on plan As below , if Equipment Nozzle "A" moves as muchΔx mm
in the direction of X by Heat Expansion ,
length ℓ is to be made as Fixed Point on Pipe "B" Δx=ℓδ.
here, Δx : axial direction Nozzle Movement (mm) δ
: piping expansion ratio (mm/m)
ℓ
: Distance(m) From Nozzle "A" to Fixed Point "B"
2.
Vertical Fixed Point Selection As below, if Equipment Nozzle "A" moves in the direction of to be decided as "C" or "D" according to movement.
Y or Z by Heat Expansion, Fixed Point is
3069E 3 1
2
Great Care is to be taken in Piping Construction because Compressor piping is big comparing to other equipment and so Compressor body can be moved by
external force of Pipe. Especially, be sure not to
inflict unreasonable force to Compressor body. Tips for Piping Construction in Site is described as below.
1.
In case Compressor location is not set up, be sure to leave 1 adjustment place in each direction and weld from Point ③~⑥. ( SR is to be performed in case Welding is required to the part of Stress Relieve(SR) )
2.
After Compressor Location is set up, connect Nozzle Flange and Pipe Flange by using the half of Bolt quantity and weld Point ①, ② temporarily by adjustingS-135, S-136. If necessary, be sure not to put unreasonable weight on the Compressor body by installing Support(S-138, DS-134). In this case, leave Lock Pin of Spring Support as it is installed.
3.
Weld
Point ⑦~⑩ by adjusting each direction. Be sure not to add unreasonable weight in welding.
4.
Remove the temporary welding of Point ①, ②. In this case, weld Point ① permanently without separating
5.
Nozzle Flange and Pipe Flange and then handle SR if necessary.
Be sure to set Nozzle Flange and Pipe Flange accurately (around half of the whole quantity of bolt), and check if Piping Alignment Requirements and Flange Distance "T" complies with the below API RP 686 Chapter 6, Paragraph 4.6 standard and weld Point ② permanently and perform SR.
Item Distance of departing from the center of Equip. & Pipe Flange Bolt Hole Slope between Equip. Flange and Piping Flange Distance between Flange ("T")
Standard
Note
Max. 1.5mm Max. 10μm/㎝1)
Max. 750μm
Space ± 1.5mm per Gasket
* Note 1) Flange Outer Diameter Standard 6.
Remove Temporary Support installed in Spool No.301-10-01 ~ 06, and install Permanent Support(S-138, DS -134, DS-133, S-136, S-135, DS-132).
7.
Install Permanent Support(DS-131, S-134, RS-152, RS-153) in Spool No.301-10-07 ~ 10
8.
Right before operating after Completion of Site Pressure Test and Flushing Work, be sure to adjust balance by removing Lock Pin(S-134 ⇒ S-135 ⇒ S-136 ⇒ S-138) from a distant place which is installed in Spring from
9.
Compressor.
Be sure to perform after approval from SECL's Piping Supervisor in case executing Job from the above No.2 to 8
Job Execution should be performed with the participation of person in charge of Piping or
Piping Design Construction from SECL in principle. 10. Consideration in Construction (1) 1F(1 Pass or Root Pass) welding is be done as TIG Welding in principle. (2) Be sure to weld by 2 workers in the symmetrical location at the same time in principle. (3) Trimming of Welding is to be performed by Instrumental Process. (4) Be sure to clean inside Pipe before connecting pipe, weld without foreign matters. (5) In case of piping installation, check centering by using Dial Gage between Coupling and connect Pipe after checking the offset is below 3/100mm. But Vendor Requirements has to be taken a priority. (6) Install Cover in Pipe Flange of Spool No.301-10-01 and manage not to let foreign matters get in. (7) Be sure to get approval from SECL's Supervisor for other unclear item.
3069E 3 1
4
3069E 3 2
4
3069E 3 3
4
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