85445531 Pipe Stress Analysis Design Basis

PIPE STRESS ANALYSIS DESIGN BASIS

BIEN DONG 1 PROJEC

BD1-00-P-A-0002

0 21-Sep-10 AFU

Rev Date Description Prep'd Check'd WP App'd BD POC App'd

Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002Date : 21-SEP-10Page : Page 2 of 14PIPE STRESS ANALYSIS DESIGN BASIS......................................................................2

1.0INTRODUCTION.....................................................................................................................................................................3

2.0SCOPE....................................................................................................................................................................................5

3.0 DEFINITION...........................................................................................................................................................................6

4.0 CODES AND STANDARDS..................................................................................................................................................8

5.0METHODOLOGY..................................................................................................................................................................10

6.0DESIGN PARAMETERS AND ASSUMPTIONS..................................................................................................................12

7.0ACCEPTANCE CRITERIA AND INPUT TO OTHER DISCIPLINES....................................................................................15

8.0 STRESS ANALYSIS REPORT............................................................................................................................................17

APPENDIX A.....................................................................................................18GENERAL LOAD CASES FOR STRESS ANALYSIS................................................18APPENDIX B.....................................................................................................22TYPICAL LOAD CASES FOR BLAST ANALYSIS....................................................22

1.0 INTRODUCTION

1.1 Project Description

The Bien Dong 1 Project is primary focused on the offshore development of the Hai Thach and Moc Tinh gas/condensate Fields in Blocks 05.2 and 05.3 in the Nam Con Son Basin approximately 340km east of eastern coast of South Vietnam together with the provision of gas and oil export facilities. The Hai Thach and Moc Tinh fields lie approximately 20km apart. The Hai Thach field is predominantly within block 05.2, but a small portion falls within block 05.3.

The project is an upstream project and includes:

• A Wellhead platform in Moc Tinh (WHP-MT1)• A Wellhead platform in Hai Thach (WHP-HT1)• A Production and Quarter Platform in Hai Thach (PQP-HT)

• A Floating Storage and Offloading (FSO) vessel in Hai Thach• An in-field pipeline from the WHP-MT1 to WHP-HT1• A condensate export line from WHP-HT1 to the FSO• A gas export pipeline form WHP-HT1 to link up to the existing Nam Con Son pipeline• A Subsea Composite Fiber Optic/ Power Cable from WHP-HT1 to the WHP-MT1•

1.2 Acronyms and AbbreviationsBD POC Bien Dong Petroleum Operating CompanyWHP HT1 Hai Thach Wellhead PlatformPQP HT Hai Thach Production and Quarters PlatformFSO Floating Storage and Offloading VesselWHP MT1 Moc Tinh Wellhead PlatformASME American Society of Mechanical EngineersAPI RP American Petroleum Institute Recommended PracticeBS British StandardsMSS Manufacturers Standardization SocietyUKOOA United Kingdom Offshore Operators AssociationEEMUA Engineering Equipment & Materials Users' AssociationDNV Det Norske VeritasWRC Welding Research CouncilGRE Glass Fiber Reinforced EpoxyPSV Pressure Safety Valve

Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002Date : 21-SEP-10Page : Page 5 of 14Rev : 0

1.3 Company General Specifications

This Specification shall be read in conjunction with the following reference Specifications.i. Piping Design Basis, BD-00-P-A-0001ii. Specification for Piping Classes, BD-00-P-S-0001iii. Piping Support Standard, BD-00-P-D-2102iv. Scope of Work for GRE Piping Systems, BD1-00-P-T-0002v. Specification for Insulation for Equipment and Piping, BD-00-M-S-0333vi. Specification for Pressure Vessels, BD-00-M-S-0338vii. Structural Design Basis, BD-00-S-A-0001viii. Project P&ID'six. Project Line List

kPa Kilo Pascal

mPa Mega Pascal

N Newton

M Meter

MM Millemeter

°C Degree Centigrade

PTFE Ploytetrafluroethylene

P& ID Piping & Instrumentation Diagram

x. Project Critical Line Listxi. Project Datasheets2.0 SCOPE2.1 General

The main objectives of the pipe stress analysis are to:• Satisfy the code requirements in ASME B31.3.• Confirm that the piping load on sensitive equipment do not exceed the allowable values.• Identify the support locations and special support requirements such as springs, rigid struts, etc.2.2 Load cases to be considered

The stress analysis shall be carried using CAESAR II software (version 5.10) and shall comply with the requirements of the codes, standard and specifications defined in Section 4.0, and shall take into consideration the following:

Document No: BD1-00-P-A-0002 Date : 21-SEP-10Page : of 14Rev : 0

Weight effects - live loads arid dead loads. Design and Operating Temperatures. Design Pressure.Temperature differential of piping, equipment and vessels.Effects of support, anchor and thermal movements.Friction effects.Wind load on exposed piping.Hydrotest.Sea Transportation (Tow / Load out case)EarthquakeBlast

3.0 DEFINITION

Bien Dong Petroleum Operating Company WorleyParsons, Kuala LumpurThe person, group, or organization responsible for the design, manufacture, testing, and load-out/shipping of the Equipment.The person, group, or organization responsible for the construction of platformThe person, group, or organization who places purchase order on VENDORA schedule of inspection and test activities identifying the stages at which VENDOR, COMPANY, third parties, or independent inspectors are involved and additionally identifying the involved specifications, acceptance criteria, and instructions that are relevant.The person, group, or organization who may be employed by VENDOR to provide services for the design, manufacture, testing, and load-out/shipping of the equipment, or, to provide materials, subcomponents, and sub-assemblies for incorporation in equipment Packages.VIRES (Vietnamese Register of shipping) or Independent Certifying Authority appointed by VENDOR for certifying equipment/equipment packages produced outside Vietnam and issuing certificates to VIRES.COMPANY/PURCHASER appointed person, group, or organization responsible for inspection and testing of equipment/ equipment packages at VENDOR'S shop.Indicates possible course of action.Indicates preferred course of action.

This document is the property of BD POC. Any unauthorised attempt to reproduce it, in any form, is strictly prohibited.

Indicates an intention of action.

COMPANYCONSULTANTVENDOR:CONTRACTORPURCHASERInspection &Test Plan (ITP)Sub-Vendor:Third PartyInspectorMayShall:Will:


Document No: BD1-00-P-A-0002 Date : 21-SEP-10Page : Page 7 of 14Rev : 0

4.0 CODES AND STANDARDS4.1 Applicable Codes and Standards

CONTRACTOR shall consider the most recent issue of the applicable Codes and Standards listed below as part of the technical requirements for the Piping System.Recommended Practice for Design and Installation of Offshore Production Platform Piping Systems

Sizing, Selection and Installation of Pressure - Relieving Devices in Refineries, Parti of II

Line PipeCentrifugal Pumps for Petroleum, Petrochemical and Natural

Gas IndustriesAxial and Centrifugal Compressors and Expander-compressors for Petroleum, Chemical and Gas Industry Services.

Air-Cooled Heat Exchangers for General Refinery Services.Positive Displacement Pumps - ReciprocatingSpecification For Subsea Wellhead And Christmas Tree

EquipmentTechnical Report On Capabilities of API Flanges Under

Combinations of LoadsPipe Flanges and Flanged Fittings Process Piping

Boiler and Pressure Vessel Code Div I & II - Rules for Construction of Pressure Vessels

4.1.3 BS StandardsBS 3974

Steel Pipeline FlangesPipe Hangers and Supports - Materials, Design and Manufacture Pipe Hangers and Supports - Selection and Application

4.1.1 API StandardsAPI RP 14EAPI RP 520API 5L API 610 API 617API 661 API 674 API 17D API 6AF4.1.2 ASME StandardsASME B16.5 ASME B31.3 ASME VIII

Specification for Pipe Supports

4.1.4 MSS StandardsMSS-SP-44 MSS-SP-58 MSS-SP-69

Specification and Recommendation Practice for the use of GRP Piping Offshore90/10 Copper Nickel Alloy Piping for Offshore Application - Publications

DNV OS-FIOI Offshore Standard-Submarine Pipeline Systems DNV-RP-D101 Structural Analysis of Piping Systems

Local Stresses in Spherical and Cylindrical Shells due to External LoadingsLocal Stresses in Cylindrical Shells due to External Loadings - Supplement to WRC Bull No.107

5.0 METHODOLOGY5.1 Line Identification5.1.1 Table 1 shall serve as the guidelines for the selection of the critical lines. The method of selection is

to review the Project Line List and P& ID's, and categorise each line in accordance with Table 1.5.1.2 The lines that require comprehensive analysis shall be listed in Critical Line List.5.1.3 Piping within the Vendor's packaged limits shall be the responsibility of the Vendor.5.1.4 All skid piping shall be analysed in accordance with the criteria given in this specification. All in-skid

piping external interface end termination points shall be anchored.5.2 Methods of Analysis

Based on the review of all information, the category of the analysis shall be determined generally in accordance with the following guidelines.

5.2.1 Category 1 - Exempt From AnalysisAll lines in category 1 shall be first reviewed for material properties and service to ensure that they are not critical. A final review of the system geometry shall be undertaken to evaluate any possible expansion, clearance, equipment interfaces, displacement, support span or support loads problems that may occur. Review of category 1 lines may not be documented.Lines that fall on category 2 or category 3 may be re-classified as category 1 when the subject lines may be readily judged by comparison with previously analysed systems.

5.2.2 Category 2 - Simplified AnalysisAll lines identified in category 2 shall be verified using simplified methods; Guided Cantilever MethodLines are of uniform size and have no more than two points of fixation, no intermediate restraints, and fall within the limitation of equation (ref. Section 319.4.1, ASME B31.3);

UKOOA

EEMUA

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4.1.5 Other Standards

WRC 107WRC 297

D= pipe outside diameter [mm]y = resultant of total displacement strains [mm] to be absorbed by the piping system

Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002Date : 21-SEP-10Page : Page 9 of 14Rev : 0L = developed length of piping between anchors [m] U = anchor distance, straight line between anchors [m] K1=208000 SA/Ea [for SI units]SA= allowable displacement stress range per Eq. (1a), ASME B31.3, [MPa] Ea= reference modulus of elasticity at 21°C, [MPa]The above methods are generally conservative and will form a quick check to ensure that the line is sufficiently flexible. As supports are generally not considered in the calculations, special attention shall be made when creating the model. Where the line is found to fail the pre-set criteria, it shall be re-classified as category 3 - subject to computer calculation.5.2.3 Category 3 - Comprehensive Analysis (Computer Calculation)All lines in category 3 shall be analysed using CAESAR II software. Piping geometry will bemodelled on the piping routing available during the analysis. Piping stress isometrics will beprepared. Where necessary, the complete piping system shall be modelled to ensure that all interactions have been taken into account.

Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002Date : 21-SEP-10Page : Page 10 of 14

TABLE 1 - Critical Line Selection CriteriaSerial

No.Line Description Design Temp.

RangeNominal Diameter

RangeAnalysis Category

Notes

(°C) (mm)

1.Connections to Rotating Equipment

upto 100 above 100 All

0 < 80 0 < 80 0 > 80

2 3 3

2.Connections to Pressure Vessels, Heat Exchangers

upto 150 upto 150 above 150

0 < 100 0> 100 0 > 80

2 3 3

3.Connections to Reciprocating Equipment

All 0 < 50 0 > 50 2 3

4.Lines subject to external movements (e.g. bridge piping)

All 0 < 80 0 > 80 2 3

5.Pressure Relief / Blow-down systems / Vent Lines

All 0 < 80 0 > 80 1 or 2 3

6.Low Temperature Service -29 > t > -46 0 < 80 0 > 80 1 or 2 3

t < -46 0 < 50 0 > 50 1 or 2 3

Rev : 0

Notes:1. The above table is applicable to metallic piping systems only.2. Stress analysis of all GRE lines shall be analysed by the Vendor.3. Transportation loads shall be considered. All pipe supports provided for transportation shall be

removed after installation of the platform.4. Blast analysis of GRE lines in Fire Water (WF) service shall be analysed by the Vendor in

accordance with section 6.10 of this document.6.0 DESIGN PARAMETERS AND ASSUMPTIONS6.1 Temperature

6.1.1 Ambient installation temperature shall be considered as 32.4°C (max.) and 16°C (min.).6.1.2 System design temperature and pressure, as stated in the Project Line List, shall be used for the

stress analysis.6.1.3 During analysis the following exceptions in using alternate temperatures, other than the design

temperatures, may be made:a) Lines directly exposed to solar radiation shall be evaluated at a temperature not lower than 60°C.b) Nozzle loads of pumps and other rotating equipments shall be evaluated at operating temperature.c) Other cases in which the system design temperature is not considered for the analysis shall be

documented with necessary justification.6.2 Miscellaneous design factors

6.2.1 Stress range reduction factor for cyclic condition shall be considered as unity, unless otherwise indicated.

6.2.2 Insulation thickness shall be as per the Project Line List / Project Insulation Specification and densities shall be in accordance with project specifications.

6.2.3 Multiple-case runs, considering variations in operating conditions for equipment and systems shall

150 < t < 260 0< 100 2

7. High Temperature Service 0> 100 3

t > 260 0 < 50 0 > 50 2 3

8. Carbon Steels, Low Temperature Carbon Steels and Large Diameter Lines

-29 < t < 149 250 <0 <400 0 > 400

2 3

9. Stainless Steel / Duplex Stainless Steel / Alloy Steels

t > 70 0< 150 0> 150 1 or 23


be performed as necessary. 6.2.4 Cold springing shall not be used for stress analysis.6.3 Wind LoadsWind loading should be considered on a case-by-case basis. In determining the need for analysis it should be noted that:

• 10" NB lines and smaller, which are guided in accordance with good practice, generally do not need specific analysis.

• In well-shielded areas wind loads may become insignificant.• When wind load is to be considered a shape factor of 0.65 and wind speed is to be applied in two

separate directions only (+/- X and +/- Z direction).Wind loading/speed at 10m above mean sea level to be considered is, 27.5 m/s (1 hr average), 37.9 m/s (3 sec gust)..6.4 Seismic Loads (Static Equivalent)

Earthquake loads (acceleartions in "g") to be used is: ±0.15 g (horizontal) in combination with ±0.25g vertical.

6.5 Wellhead GrowthFor wellhead flow lines, the thermal growth and conductor clearances, the following displacements at the Xmas tree shall be used.Vertical = +300 mm to -100 mmHorizontal = +/- 25mm6.6 Transient LoadsAny form of transient load shall be catered for. Lines subject to mixed phase flow shall have additional guides, stops or anchors for piping control6.7 Sea Transportation LoadsSea transportation loads (accelerations in "g") to be used is• Vertical Acceleration: ± 0.50 g (in addition to gravity)• Horizontal Acceleration: ±0. 60 g (in any direction)Nozzle loads shall not be evaluated in this condition.6.8 Differential DisplacementFor pipes that cross from one platform to another via bridge, platform displacement will be considered.Platform displacement values shall be in accordance with HT Sub-Structure Inplace Analysis Report,Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002Date : 21-SEP-10Page : Page 12 of 14Rev : 0WHP-HT1-S-R-0101 and PQP HT Sub-Structure Inplace Analysis Report, PQP-HT-S-R-0101.6.9 PSV ReactionForces due to PSV discharge shall be calculated as per API RP 520 if PSV manufacturer data is not available.6.10 Blast DesignCritical Piping shall be analysed for Blast loads per below table:PQP-HT PlatformCategory 3 lines in the following services:a. GF(Fuel Gas)b. PG (Hydrocarbon Gas)c. PL (Process Hydrocarbon Liquid)d. VH (Pressure Vent High)e. WF (Fire Water) - GRE lines only

There is no blast analysis requirement for WHP-HT1 Platform and WHP-MT1 Platform.The Dynamic Drag Pressure shall be applied on the piping as a wind load. Wind shape factor of 1.0shall be used for blast calculations.Blast loads shall be applied to the piping in the X, Y and Z co-ordinates, in positive and negative directions. Typical load cases to be considered for blast calculations are included as Appendix B. Blast analysis shall be performed at operating parameters (ie. operating temperature and pressure). For allowable stress, 1.8xSh (Sh: allowable stresses at temperature) shall be used. Flange leakage shall be checked, this is to ensure containment of the process fluid. In addition to the flange evaluation method specified in section 7.4 of this document, for blast analysis, bolt allowable multiplier of 1.5 can be used.Piping imposed external forces and moments on Equipment nozzles (pressure vessels, pumps, heatexchanger and skid termination flanges) not to be verified.Restraint loads during blast shall be clearly indicated in the stress isometric.

Table-2:SI. No.PQP-HT Platform Dynamic Drag

Pressure

1Sub Cellar Deck Piping 0.04 barg.

2Cellar Deck Piping 0.04 barg.

3Mezzanine Deck Piping 0.28 barg.

4Mezzanine Deck - Flare Boom Piping 0.08 barg.

5Main Deck Piping 0.04 barg.

7.0 ACCEPTANCE CRITERIA AND INPUT TO OTHER DISCIPLINES7.1 Load CasesStress analysis shall be performed for different load cases as applicable. A list of general load cases to be considered is included as Appendix A7.2 Piping StressesAll piping stresses shall be within ASME B31.3 code allowable.7.3 Nozzle Loads7.3.1 GeneralAllowable nozzle loads on equipment shall fall within the limit specified below based on the worst operating conditions.7.3.2 Pressure Vessels and Heat Exchangers:Allowable nozzle forces and moments for pressure vessels shall be Specification for Pressure Vessels, BD-00-M-S-0338 Attachment 1. Wherever loads exceed these allowable loads during detail design, vendor shall be contacted to confirm the design of equipment for applicable nozzle loadsPressure vessel nozzles shall be modelled in CAESAR II for thermal growth. Should there be difficulty in meeting the allowable nozzle loads, the nozzle stiffness as calculated/considered by CAESAR II shall be used.7.3.3 Centrifugal pumps:Centrifugal pump nozzle loads in the operating condition shall not exceed two (2) times API 610 allowable. For technical and for a safe long term operation, the nozzle loads shall not exceed two (2) times API 610 allowable. In case the nozzle loads exceed two times API 610 allowable during working condition, a Technical Query shall be issued for this.7.3.4 Turbine and Centrifugal Compressor PipingNozzle displacements for turbine and compressor nozzles shall be obtained from the supplier. Maximum piping load in the operating condition for turbine and compressor nozzles shall be 5.55 times the values obtained from NEMA SM-23 or 3 times the values obtained from API 617.7.3.5 Air Cooler PipingFor piping loads at air-coolers the maximum piping load on the air cooler nozzles shall not exceed three (3) times API 661 allowable.7.3.6 Other Equipment:Allowable nozzle loads of other equipment not specifically mentioned shall be in accordance with

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the respective Vendor and/or the governing equipment design code(s).7.4 Flange Leakage Evaluation.

Flange leakage under pipe loads is evaluated by converting piping loads to an "equivalent pressure". This value is then added to the actual system design pressure, the sum of which is then compared with the ASME B16.5 allowable pressure at corresponding load case temperature multiplied by 1.5.If a flange load exceeds the preceding value above, a flange analysis shall be performed according to the requirements of section VIII, Div.l of the ASME Boiler and Pressure Vessel Code. Flange leakage shall be evaluated at the corresponding load case temperature.

7.5 Support Loads7.5.1 Any piping loads in excess of 5KN acting horizontally and 10KN acting vertically will be provided to

the structural department for structural integrity checks.7.5.2 Spring Hanger Supports

The use of spring hangers will be minimized in the design of the piping. Spring hanger selection tables shall be extracted from the computer printouts. These types of supports shall conform to BS 3974 or MSS-SP-58 and MSS-SP-69.

7.6 FrictionThe frictional forces at the pipe supports have a significant effect on the behavior of the piping system. The additional loads due to friction at supports, restraints and equipment nozzles shall be considered.The various frictional factors to be used in the analysis are; 0.10 for PTFE to Stainless Steel / Carbon Steel support 0.20 for Stainless Steel to Stainless Steel support 0.30 for Carbon Steel to Carbon Steel support

7.7 Pipe SpansPipe spans shall be in line with the Pipe Support Standard, Doc. No. BD-00-P-D-2102.

8.0 STRESS ANALYSIS REPORTAt the end of each formal stress analysis, each Caesar II calculation shall be stored by the stress calculation number.At the completion of piping design, pipe stress engineer shall prepare stress reports for all the critical lines. The reports shall include the following:• Copy of approved stress sketches• CAESAR II graphic plots• CAESAR II electronic native input and output files. All electronic files shall be contained inCompact Disc (CD).

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Title: PIPE STRESS ANALYSIS DESIGN BASIS

Document No: BD1-00-P-A-0002 Date : 21-SEP-10Page : Page 1 of 4Rev : 0APPENDIX AGENERAL LOAD CASES FOR STRESS ANALYSIS



Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002


TYPICAL GENERAL LOAD CASES FOR STRESS ANALYSISLoad CaseDescription Case Type Combination MethodRemarks

1WW+ HP Hydro- Hydrotest2W+ P1 + T1 + (D1) OPE- Note-13W+ P1 +T2 + (D2) OPE- Note-24W+ P1 + T3 + (D3) OPE- Note-35W+ P1 SUS- Sustained6W+ P1 + T1 + D1 + WIN1 OPE- OPE + Wind7W+ P1 + T1 + D1 + WIN2 OPE- OPE + Wind

8W+ P1 +T1 + D1 + WIN3 OPE- OPE + Wind9W+ P1 +T1 + D1 + WIN4 OPE- OPE + Wind

10W+ P1 + T1 + D1 + U1 OPE- OPE + Seismic11W+ P1 + T1 + D1 + U2 OPE- OPE + Seismic12W+ P1 +T1 + D1 + U3 OPE- OPE + Seismic13W+ P1 + T1 + D1 - U1 OPE- OPE + Seismic14W+ P1 + T1 + D1 - U2 OPE- OPE + Seismic15W+ P1 +T1 + D1 -U3 OPE- OPE + Seismic16L6- L2 OCC AlgebraicWind Loads17L7- L2 OCC AlgebraicWind Loads18L8- L2 OCC AlgebraicWind Loads19L9- L2 OCC AlgebraicWind Loads20L10- L2 OCC AlgebraicSeismic Loads21L11 - L2 OCC AlgebraicSeismic Loads22L12-L2 OCC AlgebraicSeismic Loads23L13-L2 OCC AlgebraicSeismic Loads24L14-L2 OCC AlgebraicSeismic Loads25L15- L2 OCC AlgebraicSeismic Loads26L5 + L16 OCC ScalarOCC stresses27L5 + L17 OCC ScalarOCC stresses28L5 + L18 OCC ScalarOCC stresses29L5 + L19 OCC ScalarOCC stresses30L5 + L20 OCC ScalarOCC stresses31L5 + L21 OCC ScalarOCC stresses

32L5 + L22 OCC ScalarOCC stresses33L5 + L23 OCC ScalarOCC stresses34L5 + L24 OCC ScalarOCC stresses35L5 + L25 OCC ScalarOCC stresses

36L2- L5 EXP AlgebraicExpansion37L3- L5 EXP AlgebraicExpansion38L4- L5 EXP AlgebraicExpansion

39L37-L38 EXP AbsoluteExpansion

Notes1) To be used for spring design / rotating equipment nozzle loads2) To be used for static equipment nozzle loads / stress calculation.3) To be used for low temp cases eg. Blow down / relief systems.4) The Cartesian axis system used in the analysis shall be as follows: "-X" represents North

direction."Y" represents vertical axis. "-Z" represents East direction.

PIPE STRESS ANALYSIS DESIGN BASIS..................................................................2

1.0INTRODUCTION..............................................................................................................................................................3

2.0SCOPE.............................................................................................................................................................................5

3.0 DEFINITION....................................................................................................................................................................6

4.0 CODES AND STANDARDS...........................................................................................................................................8

5.0METHODOLOGY...........................................................................................................................................................10

Load CaseDescription Case Type Combination Method Remarks

40T1+(D1) EXP - Expansion41T2+(D2) EXP - Expansion

42T3+(D3) EXP - Expansion43L2 - L40 SUS Algebraic Hot Sustained44L3 - L41 SUS Algebraic Hot Sustained

45L4 - L42 SUS Algebraic Hot Sustained

LegendWW = Weight of Pipe (with Water)HP = Hydrotest PressureW = Weight of Pipe (with process Fluid)

L Load Case (for example, L6 = Load Case 6 =W+P1+T1+D1+WIN1)

T1 = Operating Temp

T2 = Design TemperatureT3 = Low Temp Case (if applicable)P1 = Design PressureD1,D2, D3 = Initial Displacement @ T1, T2, T3 (if applicable)

WIN 1 = Wind in (+) X - directionWIN 2 = Wind in (-) X - direction

WIN 3 = Wind in (+)Z - directionWIN 4 = Wind in (-) Z - directionU1 = Seismic Acceleration in "X" directionU2 = Seismic Acceleration in "Y" direction

U3 = Seismic Acceleration in "Z" direction

6.0DESIGN PARAMETERS AND ASSUMPTIONS...........................................................................................................12

7.0ACCEPTANCE CRITERIA AND INPUT TO OTHER DISCIPLINES.............................................................................15

8.0 STRESS ANALYSIS REPORT.....................................................................................................................................17

APPENDIX A....................................................................................................18GENERAL LOAD CASES FOR STRESS ANALYSIS...............................................18APPENDIX B....................................................................................................22TYPICAL LOAD CASES FOR BLAST ANALYSIS...................................................22

Speed m / Sec.Pipe size nominal diameter in mmMarking of Support Loads on Stress Sketches:Support loads shall be marked as follows:1. Highest of all the Loadcases (Including Hydro, Earthquake & Wind).

APPENDIX BTYPICAL LOAD CASES FOR BLAST ANALYSIS

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Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002

Title: PIPE STRESS ANALYSIS DESIGN BASIS Document No: BD1-00-P-A-0002Date : 21-SEP-10Page : Page 2 of 3Rev : 0TYPICAL LOAD CASES FOR BLAST ANALYSIS

BLAST IN POSITIVE DIRECTIONLoad CaseDescription Case Type Combination

MethodRemarks

1W+T1+P1 OPE- OPE2W+ P1 + T1 + WIN1 OPE- For Support loading and Flange

Leakage3W+ P1 + T1 + WIN2 OPE- For Support loading and Flange

Leakage4W+ P1 +T1 + WIN3 OPE- For Support loading and Flange

Leakage5W+ P1 SUS-6L2-L1 SUS Algebraic7L3 -L1 SUS Algebraic8L4-L1 SUS Algebraic

9L5 + L6 SUS ScalarStress Check10L5 + L7 SUS ScalarStress Check11L5 + L8 SUS ScalarStress Check12L1 - L5 EXP AlgebraicExpansion

LegendW = Weight of Pipe (with process Fluid)L = Load Case (for example, L1 = Load Case 1 =W+P1+T1)T1 = Operating TemperatureP1 = Operating PressureWIN 1 = Dynamic Drag Pressure in (+) X - directionWIN 2 = Dynamic Drag Pressure in (+) Y - directionWIN 3 = Dynamic Drag Pressure in (+) Z - direction


LegendW = Weight of Pipe (with process Fluid)L = Load Case (for example, L1 = Load Case 1 =W+P1+T1)T1 = Operating TemperatureP1 = Operating PressureWIN 1 = Dynamic Drag Pressure in (-) X - directionWIN 2 = Dynamic Drag Pressure in (-) Y - directionWIN 3 = Dynamic Drag Pressure in (-) Z - directionNotes1) The Cartesian axis system used in the analysis shall be as follows: "-X" represents North direction.

"Y" represents vertical axis. "-Z" represents East direction.PIPE STRESS ANALYSIS DESIGN BASIS......................................................................2

1.0INTRODUCTION...............................................................................................................................................................................3

2.0SCOPE..............................................................................................................................................................................................5

3.0 DEFINITION......................................................................................................................................................................................6

4.0 CODES AND STANDARDS.............................................................................................................................................................8

5.0METHODOLOGY............................................................................................................................................................................10

6.0DESIGN PARAMETERS AND ASSUMPTIONS.............................................................................................................................12

7.0ACCEPTANCE CRITERIA AND INPUT TO OTHER DISCIPLINES..............................................................................................15

BLAST IN NEGATIVE DIRECTIONLoad CaseDescription Case Type Combination

MethodRemarks

1W+T1+P1 OPE- OPE2W+ P1 +T1 + WIN1 OPE- For Support loading and Flange



Leakage5W+ P1 SUS-6L2- L1 SUS Algebraic7L3- L1 SUS Algebraic8L4-L1 SUS Algebraic

9L5 + L6 SUS ScalarStress Check10L5 + L7 SUS ScalarStress Check11L5 + L8 SUS ScalarStress Check

12L1 - L5 EXP AlgebraicExpansion

8.0 STRESS ANALYSIS REPORT......................................................................................................................................................17

APPENDIX A.....................................................................................................18GENERAL LOAD CASES FOR STRESS ANALYSIS................................................18APPENDIX B.....................................................................................................22TYPICAL LOAD CASES FOR BLAST ANALYSIS....................................................22

Speed m / Sec.Pipe size nominal diameter in mm

Marking of Support Loads on Stress Sketches:Support loads shall be marked as follows:1. Maximum load of the positive and negative blast cases shall be marked.

85445531 Pipe Stress Analysis Design Basis

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