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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 FLEXIBILITY ANALYSIS
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
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 : 2 of 9
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
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 : 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
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 : 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
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 : 5 of 9
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
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 : 6 of 9
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
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 : 7 of 9
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
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 : 8 of 9
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 : 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)
Case No. Node MaterialCode Stress
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)
Case No. Node MaterialCode Stress
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
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 : 10 of 9
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
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-027 Rev. no : R2
APPENDIX 1
STRESS SKETCHES
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-027 Rev. no : R2
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
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-027 Rev. no : R2
APPENDIX 3
CONSTRUCTION ISOMETRICS
Hold for drawing numbers:410210-1101
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-027 Rev. no : R2
APPENDIX 4
MISCELLANEOUS CALCULATIONS
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-027 Rev. no : R2
APPENDIX 5
CAESAR II PRINTOUT
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