144-111-PI-CAL-005_R1

Project No : 040176

PIPING FLEXIBILITY ANALYSIS

Client : Petro Canada

Project : De Ruyter Production Platform

Location : P11-b

Document number: 144-111-PI-CAL-005 Rev. no : R1 Page : 1 of 10


PIPING SYSTEM

SK-005

PREPARED FOR

By:Iv-Oil & Gas b.v

Rev. Description Date By Checked Appr’d by

R1 For Comments / Approval 01-07-2005 H.v.d.Weele R. Tjin M. van Neck

Project No : 040176




Location : P11-b


Rev. Description Date By Checked Appr’d by

R1 For Comments / Approval 01-07-2005 H.v.d.Weele R. Tjin M. van Neck

Project No : 040176




Location : P11-b


TABLE OF CONTENTS Page

INTRODUCTION................................................................................................................................................. 31.1 SCOPE OF WORK.............................................................................................................................. 31.2 APPLICABLE CODES......................................................................................................................... 31.3 REFERENCE DOCUMENTS..............................................................................................................3

2. SYSTEM DESIGN.......................................................................................................................................... 42.1 LINE DATA........................................................................................................................................... 42.2 CII Calculations.................................................................................................................................... 42.3 DESIGN LOAD CASES........................................................................................................................ 52.4 ALLOWABLE STRESSES...................................................................................................................62.5 BLAST CALCULATIONS..................................................................................................................... 62.6 PIPE SUPPORTS................................................................................................................................ 72.7 FLANGE CONNECTIONS...................................................................................................................72.8 NOZZLE LOADS.................................................................................................................................. 7

3. STRESS ANALYSIS...................................................................................................................................... 83.1 COMPUTER MODEL........................................................................................................................... 8

4. ANALYSIS RESULTS................................................................................................................................... 94.1 STRESSES.......................................................................................................................................... 94.2 FLANGES............................................................................................................................................ 94.3 NOZZLE LOADS................................................................................................................................ 10

APPENDICES

APPENDIX 1 STRESS SKETCHES

APPENDIX 2 PIPE SUPPORT DETAILED DRAWINGS

APPENDIX 3 CONSTRUCTION ISOMETRICS

APPENDIX 4 MISCELLANEOUS CALCULATIONS

APPENDIX 5 CAESAR II PRINTOUT

APPENDIX 6 NOZZLE LOADS

Project No : 040176




Location : P11-b


INTRODUCTION

1.1 SCOPE OF WORK

The purpose of this report is to demonstrate that piping system SK-005, part of De Ruyter topside piping, has inherent flexibility to accommodate displacements due to design conditions, without imposing any excessive loads on pipe supports and equipment nozzles. Furthermore the piping stress level has to satisfy the designated code.

1.2 APPLICABLE CODES

The governing code for piping design is:

ASME B31.3 Process Piping

For items not covered by the above-mentioned document, reference is made to the following codes and standards:

ASME VIII Rules for construction of pressure vessels, Division 1 and 2

ASME III Rules for Construction of Nuclear Facility Components, Division 1

ASME B16.5 Pipe Flanges and Flanged Fittings

WRC-107 Local stresses in Spherical and Cylindrical Shells due to External loadings

1.3 REFERENCE DOCUMENTS

144-002-PI-SPE-0002 Piping Classes Specifications

144-002-PI-SPE-0007 Plant Department Pipe Stress Design Criteria

144-111-PI-LST-0001 Plant Department Critical Line List

144-000-PR-LST-0001 Process Line List

144-000-ME-SPE-0004 Nozzle Loads on Equipment

144-002-HE-TNS-0007 Blast Design Strategy and Overpressures

Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-005 Rev. no : R1 Page : 5 of 10 2. SYSTEM DESIGN

2.1 LINE DATA

Functional design data, used for analysis, is summarised below:

Item/ Line No.

Pipe

Cla

ss

Cor

rosi

on

Allo

wan

ce

Des

ign

Pres

sure

Hyd

rote

st P

ress

ure

Max

imum

Des

ign

Tem

pera

ture

Min

imum

Des

ign

Tem

pera

ture

Ope

ratii

ng T

emp.

Med

ium

Den

sity

Flan

ge R

atin

g

Drawing Number

- mm barg barg °C °C °C Kg/m3 # -

10”-CO-200-010-A41-I A41 3 10 15 85 -11 60 740 150200010-0201/

0501

10”-CO-200-046-A41-I A41 3 25 37.5 85 -11 60 740 150 200046-0201

1.5”-CO-200-066-A41-I A41 3 25 37.5 85 -11 60 740 150 200066-0201

2”-BD-410-155-A41-V A41 3 15 22.5 100 -11 64 740 150410155-0201/

0501

Note: Installation temperature assumed as -11°C throughout.

2.2 CII CALCULATIONS

The following CII calculations have been performed:

SK-005A-R1 : Design conditions

SK-005B1-R1 : Blast loads between EL+18000 and EL. +26000.

SK-005B2-R1 : Blast loads above EL. +26000 only for line 1.5”-CO-200-066-A41-I and 2”-BD-410-155-A41- V.

Project No : 040176




Location : P11-b


2.3 DESIGN LOAD CASES

The Functional Loads, used to generate the design load cases, comprise the following:

(W) Gravity load, due to self-weight of steel, contents and insulation.

(P1) Pressure load, due to design pressure.

(T1) Thermal load due to maximum design temperature (all piping).

(WIN1..4) Wind loads based on 42m/s velocity at 10m (100 year - 3 sec’s gust). Loads are applied in +X for Case 1, -X for Case2, +Z for Case 3 and –Z for Case 4.

(D1) Displacements due to expansion.

(H) Hanger loads.

(F1) Relief Force.

Project No : 040176




Location : P11-b


2.4 ALLOWABLE STRESSES

The allowable stresses are in compliance with the criteria specified in ASME B31.3

Material Max temp [ºC ]

Material Properties [N/ mm²]

Allowable stresses [N/mm²]

SMTS SMYS Sh Sa (EXP) Socc (OCC)

A333 Gr. 6 100 414 241138 207 183

Sustained Stress range Occasional

Note : Stress range is based on a stress reduction factor (f) of 1.

2.5 BLAST CALCULATIONS

The blast critical piping has been identified as per doc. no 144-002-HE-TNS-0007, table C1. Crude oil exchanger 200-HA-01 Nozzle N2A and line 1.5”-CO-200-066-A41-I are blast critical. Blast loads are applied from node 280 (deck penetration EL.+26000) to Nozzle N2A of 200-HA-01 and line1.5”-CO-200-066-A41-I from tie-in at node 510 to tie-in at line 16”-BD-410-200-A41-V.

Blast Load: 20 KN/m2

Shape factor: 0.9 (conservative approach resulting in approximately 20% safety margin).

The blast loads are generated using CII wind modeler. The loads are applied in four (4) directions as described in section 2.3, above.A shape factor of 0.9 has been used (conservative approach).

Pipe supports are designed for blast loads from node 290 up toand including node 895.

Project No : 040176




Location : P11-b


2.6 PIPE SUPPORTS

All loads on supports are summarised in the Pipe Stress Analysis Output.

The loads include the friction forces. In general a friction coefficient of 0.4 is taken into account for friction between steel surfaces. In special cases where PTFE-sliding pads may be applied a friction coefficient of 0.1 shall be taken into account. The pipe support detail drawings are included in Appendix 2.

2.7 FLANGE CONNECTIONS

Flange connections are modelled in CAESAR II by anchoring together the rigid elements through a CNODE. This enables an easy check of the external loads using CII restraint output summary.

For B16.5 flange analysis, either of the following two methods has been used:

1. External loads acting on these connections are assessed using the ASME BPVC, Section VIII, Division 1, Appendix 2 in combination with Section III, subsection NC. Actual hub length is used.

2. External loads acting on these connections are assessed using the ASME Section III, Division 1, subsection NC-3658.3, ASME B16.5a Flanged Joints with High Strength Bolting, with yield stress at temperature, SY, substituted with B31.3 allowable stress, Sh.

Flange analysis is performed for maximum acting loads and calculations are performed for each flange size in the calculation.

2.8 NOZZLE LOADS

External loads acting on pressure vessel nozzles are compared against the allowable load sheet. In the event that the allowable loads are exceeded, manufacturer’s acceptance is obtained for the higher loads or WRC-107 calculations are carried out.

For pump nozzle loads, vendor allowable values have been used for assessment.

Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-005 Rev. no : R1 Page : 9 of 10 3. STRESS ANALYSIS

3.1 COMPUTER MODELFinite element computer models are developed based on the stress isometric included in Appendix 1.

Pipe stress program CAESAR II version 4.50, developed and marketed by COADE Engineering Software has been used for the analysis of the piping systems. This software package is a widely accepted tool to perform comprehensive stress analysis of complex piping systems.

The global co-ordinate system used in the computer model is indicated on the stress isometrics. Small differences in dimensions between the piping isometrics and the calculations may occur, but have no significant effect on the analysis.

The pipe routing of this system is shown below:

Blast limit of

critical piping

Node 140

Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-005 Rev. no : R1 Page : 10 of 10 4. ANALYSIS RESULTS

4.1 STRESSES

The maximum calculated code stresses are summarized below and compared against B31.3 code allowable values. For blast case the calculation method set in document no144-002-PI-SPE-0007 was used. The calculated 3D stress intensities are compared with yield at operating temperature (230N/mm2) multiplied by 4/.

All stresses are found to be within the allowable limits.

Table 5.1.1 Maximum Sustained Stress (SK-005A-R1)

Case No. Node MaterialCode Stress

N/mm²

Allowable Stress

N/mm²

Ratio

8 835 A333 Gr. 6 41.5 138 0.30

Table 5.1.2 Maximum Stress Range (SK-005A-R1)


N/mm²

Allowable Stress

N/mm²

Ratio

19 739 A333 Gr. 6 65.6 207 0.32

Table 5.1.3 Maximum Occasional Stress – Wind effects (SK-005A-R1)


N/mm²

Allowable Stress

N/mm²

Ratio

20 665 A333 Gr. 6 177.3 183 0.97

Table 5.1.4 3D Stresses – Blast effects (SK-005B1-R1)

Case No. Node Material3D Stress

N/mm²

Allowable Stress

N/mm²

Ratio

10 450 A333 Gr. 6 171.2 292.7 0.58

Table 5.1.5 3D Stresses – Blast effects (SK-005B2-R1)

Case No. Node Material3D Stress

N/mm²

Allowable Stress

N/mm²

Ratio

10 665 A333 Gr. 6 208 292.7 0.71

4.2 FLANGES

The integrity of the ASME B16.5 flanges, under the maximum external loads, has been checked as outlined in section 2.7. The external loads are found to be acceptable. Detailed flange calculations and the summary have been included in Appendix 4 where required.

Project No : 040176




Location : P11-b


4.3 NOZZLE LOADS

The maximum external nozzle loads are listed below and compared with the allowable values. In case nozzle loads exceed the allowable values, the applicable cases are listed separate, showing only the maximum combinations for bending and / or torsion.

Note: Forces in [N] and moments in [Nm]

Table 4.3.1 Vessel 200-VS- 02 / N1

Design Case

Size Calc. No. Node No.

Fx Fy Fz Mx My Mz

10”-150# SK-005A-R1 10 1599 3797 3799 7470 2179 779

Allowable values 8600 8600 8500 7000 6000 13000

Table 4.3.2 Vessel 200- HA- 01A / N2A

Design Case


Fx Fy Fz Mx My Mz

10”-150# SK-005A-R1 580 3711 5417 3933 3180 3165 1704

Allowable values 8600 8500 8600 7000 13000 6000

Blast Case (4)


Fx Fy Fz Mx My Mz

10”-150# SK-005B1-R1 580 -4064 -5730 14686 6694 4475 6012

Allowable values 1) 9460 9350 9460 7700 14300 6600

Blast Case (5)


Fx Fy Fz Mx My Mz

10”-150# SK-005B1-R1 580 8557 -4602 -8704 -9340 1438 -4020

Allowable values 1) 9460 9350 9460 7700 14300 6600

1) Maximum allowable values according equipment manufacturer.

Verified nozzle loads for the design case of 200- HA- 01A / N2A are within the allowable values.

Several nozzle loads in different cases are exceeding the allowable values. Design case of 200-VS- 02 / N1 and blast case (5) of 200- HA- 01A / N2A showing that combined bending moments and forces are within the combined allowable moments and forces, therefore these loads are considered acceptable.

Blast case (4) of 200- HA- 01A / N2A is exceeding for combined bending moments, however for the total combination of the forces (all three directions), loads are not exceeded. As backup, a WRC-107 calculation is performed and found acceptable (See appendix. 6).

Project no : 040176


Project title : De Ruyter Production Platform

Location : P11-b


Document number : 144-111-PI-CAL-013 Rev. no : R1

APPENDIX 1

STRESS SKETCHES

Project no : 040176



Location : P11-b



APPENDIX 2

PIPE SUPPORT DETAILED DRAWINGS

Project no : 040176



Location : P11-b



APPENDIX 3

CONSTRUCTION ISOMETRICS

Project no : 040176



Location : P11-b



APPENDIX 4

MISCELLANEOUS CALCULATIONS

Project no : 040176



Location : P11-b



APPENDIX 5

CAESAR II PRINTOUT

Project no : 040176



Location : P11-b



APPENDIX 6

NOZZLE LOADS

Documents

144-111-PI-CAL-005_R1