144-111-PI-CAL-027_R2

Project No : 040176

PIPING FLEXIBILITY ANALYSIS

Client : Petro Canada

Project : De Ruyter Production Platform

Location : P11-b

Document number: 144-111-PI-CAL-027 Rev. no : R2 Page : 1 of 9


PIPING SYSTEM

SK-027

PREPARED FOR

By:Iv-Oil & Gas b.v

Rev. Description Date By Checked Appr’d by

R2 For Comments / Approval 4-07-2005 S. Hall R. Tjin M. van Neck

Project No : 040176




Location : P11-b


TABLE OF CONTENTS Page

1. 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................................................................................................................................ 62.7 FLANGE CONNECTIONS...................................................................................................................62.8 NOZZLE LOADS.................................................................................................................................. 7

3. STRESS ANALYSIS...................................................................................................................................... 73.1 COMPUTER MODEL........................................................................................................................... 7

4. ANALYSIS RESULTS................................................................................................................................... 84.1 STRESSES.......................................................................................................................................... 84.2 FLANGES............................................................................................................................................ 94.3 NOZZLE LOADS.................................................................................................................................. 9

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

Document number: 144-111-PI-CAL-027 Rev. no : R2 Page : 3 of 9 1. INTRODUCTION

1.1 SCOPE OF WORK

The purpose of this report is to demonstrate that piping system SK-027, 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-027 Rev. no : R2 Page : 4 of 9 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 A

llow

ance

Des

ign

Pres

sure

Hyd

rote

st P

ress

ure

(hyd

roty

est i

n sh

op o

nly

for H

P fla

re li

ne)

Max

imum

Ope

ratin

g Te

mpe

ratu

re

Max

imum

Des

ign

Tem

pera

ture

Min

imum

Des

ign

Tem

pera

ture

Med

ium

Den

sity

Flan

ge R

atin

g

Drawing Number

- mm barg barg °C °C °C Kg/m3 # -

16”-BD-410-210-A42-V A42 3 5 7.5 60 140 -46 5 150 410210-0301

16”-BD-410-210-A42-V A42 3 5 7.5 60 140 -46 5 150 410210-1101

Note: Installation temperature is assumed to be -11ºC throughout.

2.2 CII CALCULATIONS

The following CII calculations have been performed:

SK-027A-R2 : Design conditions

SK-027B-R2 : Blast loads

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 operating temperature (all piping)

(T2) Thermal load due to maximum design temperature (all piping)

(T3) Thermal load due to minimum 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

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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. 6 140 414 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. Vessel 410-VA-01, nozzle N2 and line 16”-BD-410-210-A42-V are blast critical as per 144-002-HE-TNS-0007, table C1. However, as blast is only likely to occur up to the weather deck at EL.35000mm, blast is not considered above that point, at node 200.

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 up to including node 200.

2.6 PIPE SUPPORTS

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

The loads include friction forces. A friction coefficient of 0.3, in this case for piperack piping, 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. Available 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.

Project No : 040176




Location : P11-b


2.8 NOZZLE LOADS

External loads acting on pressure vessel nozzles are compared against the allowable load sheet (refer Appendix 6).

In the event that the allowable loads are exceeded, manufacturer’s acceptance is obtained for the higher loads or a WRC-107 calculation is carried out.

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

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 200

Project No : 040176




Location : P11-b


Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-027 Rev. no : R2 Page : 9 of 9 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 no. 144-002-PI-SPE-0007 was used. The calculated 3D stress intensities are compared with yield at operating temperature (230 N/mm2) multiplied by the shape factor, 4/.

All stresses are found to be within the allowable limits.

Table 4.1.1 Maximum Sustained Stress (SK-027A-R2)

Case No. Node MaterialCode Stress

N/mm²

Allowable Stress

N/mm²

Ratio

10 180 A333 Gr. 6 60 138 0.43

Table 4.1.2 Maximum Stress Range (SK-027A-R2)


N/mm²

Allowable Stress

N/mm²

Ratio

20 150 A333 Gr. 6 145 207 0.70

Table 4.1.3 Maximum Occasional Stress – Wind effects (SK-027A-R2)


N/mm²

Allowable Stress

N/mm²

Ratio

18 180 A333 Gr. 6 64 183 0.35

Table 4.1.4 3D Stresses – Blast effects (SK-027B-R2)

Case No. Node Material3D Stress

N/mm²

Allowable Stress

N/mm²

Ratio

1 120 A333 Gr. 6 140 293 0.48

Project No : 040176




Location : P11-b


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.

4.3 NOZZLE LOADS

The maximum external nozzle loads are listed below and compared with the allowable values.

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

Table 4.3.1 Vessel 410-VA-01 / N2

Design Case

Size Calc. No. Node No.

Fx (VC) Fy (P) Fz (VL) Mx (ML) My (MR) Mz (MC)

16”-150# SK-027A-R2 10 2040 8300 6520 11030 20500 9260

Allowable values 11000 10500 11000 11500 22000 10000

Blast Case

Size Calc. No. Node No.

Fx (VC) Fy (P) Fz (VL) Mx (ML) My (MR) Mz (MC)

16”-150# SK-027B-R2 10 15675 9565 28685 38480 22735 20940

Allowable values (x 2) 22000 21000 22000 23000 44000 20000

Original nozzle loads from Rev 0 of this calculation (shown in 40176-PE-NL-027-01 Rev 0) were over allowable and have been approved by the vendor – refer Appendix 6.

Nozzle loads above from the revised calculation are within allowable for the design case but VL, ML and MC are over for the blast case. These nozzle loads are less than those approved by the vendor and are therefore acceptable – refer Appendix 6.

Project no : 040176


Project title : De Ruyter Production Platform

Location : P11-b


Document number : 144-111-PI-CAL-027 Rev. no : R2

APPENDIX 1

STRESS SKETCHES

Project no : 040176



Location : P11-b



APPENDIX 2

PIPE SUPPORT DETAILED DRAWINGS

Hold for support drawings of the following node numbers:45; 55; 70; 105; 130; 170; 190; 200; 210; 220; 240; 260; 270; 290; 325

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Location : P11-b



APPENDIX 3

CONSTRUCTION ISOMETRICS

Hold for drawing numbers:410210-1101

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-027_R2