tank lifting calculations

7/28/2019 Tank Lifting Calculations

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Wood Group CCC Strength Calculation book for T-4804

PDO - Contract - C311163 NIM-48-110239-MP-1206-00001-0001

2

ReferenceRevisionPage

Front Sheet012 of 36

LIST OF CONTENTS

1 INTRODUCTION 3

1.1 Project Background 3

1.2 Reference Drawing 3

1.3 Abbreviations 3

2 SUMMARY OF WORKS 4

2.1 Methodology 4

2.2 HOLDS 4

2.3 Assumptions 4

3 SUMMARY OF RESULTS 5

4 LEGISLATION, CODES, STANDARDS & REFERENCES 5

4.1 General 5

4.2 Shell Group Standards (DEP ver. 34) 5

4.3 International standards 5

4.4 Handbook 6

4.5 Language unit of measurements 6

5 CALCULATION SHEET 6

5.1 Lifting Beam Calculation For J ack Up 65.2 Beam Reinforcement Pad Calculation 13

5.3 Opening Stiffener Calculation 22

5.4 Clean Out Door Opening 33

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LIST OF CONTENTS

1 INTRODUCTION 3

1.1 Project Background 3

1.2 Reference Drawing 3

1.3 Abbreviations 3

2 SUMMARY OF WORKS 4

2.1 Methodology 4

2.2 HOLDS 4

2.3 Assumptions 4

3 SUMMARY OF RESULTS 5

4 LEGISLATION, CODES, STANDARDS & REFERENCES 5

4.1 General 5

4.2 Shell Group Standards (DEP ver. 34) 5

4.3 International standards 5

4.4 Handbook 6

4.5 Language unit of measurements 6

5 CALCULATION SHEET 6

5.1 Lifting Beam Calculation For J ack Up 65.2 Beam Reinforcement Pad Calculation 13

5.3 Opening Stiffener Calculation 22

5.4 Clean Out Door Opening 33

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1 INTRODUCTION

This calculation book consist of strength analysis required for the repair of tank T-4804 at Marmul production station for Petroleum Development OmanLLC hereafter referred as Purchaser / Owner / Company.

The extent of repair under this calculation book includes partial floor plate,clean out door, opening reinforcement and required beam for shell plate jackup.

1.1 Project Background

Concentric double wall wash tank T-4804, with nominal diameter of 36000mm outer / 27500 mm inner and 9800 mm outer height / 10650 mm inner

height with the capacity of 8040 m3

located in NIMR production station. Tankrequired partial floor plate replacement including replacement of clean outdoors and reinforcement of opening on both shell.

In order to replace the annular plates under the shell, shell shall be lifted byusing hydraulic jacks with twenty four numbers of cantilever beams weldedto the shell.

1.2 Reference Drawing

NIM-48-110239-MS-4018-00001-0001/2 General Arrangement DWG for

T-4804

NIM-48-110239-MX-4024-00001-0001 Detail of bottom plate T-4804

NIM-48-110239-MX-2580-00001-0001 Detail of COD (Outer shell) T-4804

NIM-48-110239-MX-2580-00002-0001 Detail of COD (Inner shell) T-4804

NIM-48-110239-MX-2580-00003-0001 Detail of Opening reinforcement T-4804

1.3 Abbreviations

The below abbreviations are adopted in this requisition

API

ASTM

American Petroleum Institute

American Society For Testing Materials

AVME Approved Vendors of Materials and Equipment

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WG-CCC

PDO

ASMEBS

SP

DEP

AISC

ASD

EN

WRC

Wood Group CCC Ltd.

Petroleum Development Oman LLC

American Society of Mechanical EngineersBritish Standard

Specification

Design Engineering Practice

American Institute of Steel Construction

Allowable Strength Design

European Norm

Welding research council

2 SUMMARY OF WORKS

2.1 Methodology

The main method is used in calculation of beams, pads, reinforcement arethe principal mechanical strength calculation from the references introducedin Para. 4.0 herein.

2.2 Holds

There is not any HOLD point for the calculation.

2.3 Assumptions

- Shell, roof, structure assumed not corroded and all the loads calculatedfor the jacking purpose are for a new tank.

- Roof truss are supported by inner shell only.- Tank is stable against wind condition and no calculation is performed for

the wind stability check as per Purchaser instruction.

- Design code is as per DEP 34.51.01.31-Gen and EN14015.

- Repair works is as per API 653.

- Inner shell lifting beam is designed considering Max. jack lifting capacityof 12 Ton.

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- Outer shell lifting beam is designed considering max. jack lifting capacityof 15 Ton.

- Thickness of reinforcing pad for outer shell jack up beam is assumed as

15 mm in calculation while used thickness is 20 mm.

- Thickness of reinforcing pad for inner shell jack up beam is assumed as10 mm in calculation while used thickness is 20 mm. 10 mm thk. Innerpad is welded to shell to increase shell thickness locally.

3 SUMMARY OF RESULTS

Summary of results are as below:

- Tank shell lifting beam size is HD 260 x 172 for inner and outer shell

- Since the annular of outer tank will be repaired partially while inner tankwill be undergone complete annular plate replacement, Tank shell liftingbeam quantity will be 24 No.s for inner and 8 No.s for outer shell.

- Tank shell opening reinforcement beam size is HD 320 x 245 for bothinner and outer shell.

4 LEGISLATION, CODES, STANDARDS &REFERENCES

4.1 General

All listed documents shall be the latest issue. The international standardsshall be read in conjunction with the corresponding DEP amendment.

4.2 Shell Group Standards (DEP ver. 34):

DEP 00.00.06.06-Gen - Index of standard drawings

DEP 00.00.20.10-Gen. - The Use of SI Quantities.

DEP 34.51.01.33-Gen Above ground vertical storage tanks (Amendments

to API 650)DEP 34.51.01.31-Gen Vertical steel storage tanks - Selection design and

construction (amendments/supplements to EN14015)

4.3 International Standards:

ASME SEC II, Ed.2010, Add.2011 Materials

API 650, Ed.2011 Welded tank for oil storage

API 653, Ed.2009 Tank inspection, repair, reconstruction and alteration


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BS/EN 14015, Ed.2004 Specification for the design and manufacture of sitebuilt, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks forthe storage of liquids at ambient temperature and above

4.4 Handbook:- Roark Formulas for Stress and Strain, Warren C. Young, Richard G.

Budynas, Sixth Ed.

- Pressure Vessel Design manual, Dennis R. Moss, Third Ed.

- AISC Manual of Steel Construction, ASD, 9th Edition, 1989.

- P ressure vessel design handbook, Henry H. Bednar,

4.5 Language and Units of Measurement

The English language and the SI system in accordance withDEP.00.00.20.10-Gen of units shall be used throughout for all documentationand drawings. Where necessary for a specific application, alternative unitsmay be indicated in brackets together with the SI units.

5 CALCULATION SHEET

5.1 Lif ting Beam Calculation for Jack Up

The beam size used for the cantilever beam is HD 260X172:

Outer shell c antilever beam

Yield Stress for S-275J R: 275 Mpa

M: 15,000 x 0.5 x 9.81 = 73,575 N.m

Z: 2,159,000 mm 3

Bending stress: 34 Mpa < 165 Mpa (0.6*F y), OK

Inner shell c antilever beam


M: 12,000 x 0.5 x 9.81 = 58,860 N.m


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Z: 2,159,000 mm 3

Bending stress: 27.2 Mpa


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- Load with torque T:

where:

Aw ... weld throat area [mm 2, in 2]Iw ... moment of inertia of the weld [mm 4, in 4]

J w ... polar moment of inertia of the weld [mm 4, in 4]s ^ ... normal stress vertical to the weld direction [MPa, psi]s ll ... normal stress parallel to the weld direction [MPa, psi]t^ ... shear stress vertical to the weld direction [MPa, psi]t ll ... shear stress parallel to the weld direction [MPa, psi]

For connections stressed by combined load, the resulting "equivalent" stress in the

weld is specified from the relation:

Which for s ll=0 can be adjusted as:

The sectional properties for the selected basic shapes of weld groups can be foundin the following table. In order to specify the polar moment of inertia of the weld, youcan use the following relation:

Where:

a.... Weld throat thickness [mm, in]: 15 * 0.707: 10.6 mm

B.... Width of weld group [mm, in]: 268 mm

D.... Weld diameter [mm, in]: 15 mm

H.... Height of weld group [mm, in]: 225 mm

L.... Weld length [mm, in]: Not applicable

s.... Flange thickness [mm, in]: 32.5 mm

t.... Web thickness [mm, in]: 18 mm

ryHalf of the height [mm, in]: 145 mm


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Aw: 2 * 10.6 * (225+268-2*18): 9688.4 mm 2

IwX : 90,823,094.8 mm 4

Allowable stress for A-283 Gr.C: 0.6 * F y :137 Mpa for bending and combinedload and 0.4 * F y :92 Mpa for shear.

Ref.: Pressure vessel design handbook, Henry H. Bednar, Section 10.0Weld design

F y: 15,000 kg: 147,150 N (Calculation for the worse case outer shell only)

- Shear force: 15.2 Mpa < 0.4 * F y (92) Mpa OK

M: 15,000 x 0.5: 7500 kg.m (Calculation for the worse case outer shell only)

- Bending moment: 117.5 Mpa < 0.6 * F y (137) Mpa OK

- Load Combination: 118.4 Mpa < 0.6 * F y (137) Mpa OK

Weld attachment between pad and shell

H: 1000 / 800 mm (Outer / Inner)

B: 1530 / 800 mm (Outer / Inner)

a: 14 x 0.707 / 6 x 0.707: 9.9 / 4.2 mm (Outer / Inner)

Aw: 50,084 / 13,574 mm 2 (Outer / Inner)

IwX : 9,372,520,490 / 1,459,493,232 mm 4 (Outer / Inner)

F y: 15,000 / 12000 kg (Outer / Inner)


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- Shear force: 2.9 / 8.67 Mpa (Outer / Inner) < 0.4 * F y (92) Mpa OK

M: 7500 / 6000 kg.m (Outer / Inner)

- Bending moment: 3.93 / 16.13 Mpa (Outer / Inner) < 0.6 * F y (137) Mpa OK

- Load Combination: 4.9 / 18.3 Mpa (Outer / Inner) < 0.6 * F y (137) Mpa OK


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Figure 5.1 Lifting bracket with pad plate for inner tank


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Figure 5.2 Lifting bracket with pad plate for out er tank


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5.2 Beam Reinforcement Pad Calculation:

At tachment parameter

- Pressure Vessel Design manual, Dennis R. Moss, Third Ed. Procedure5.3, attachment parameter

2C1: 0.8*b: 0.8*268: 214.4 mm

2C2: h: 290 mm


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Outer shell c antilever beamInput Echo, WRC107 Item 1, Description: Beam outshell

Di amet er Basi s f or Vessel Vbasi s ODCyl i ndr i cal or Spher i cal Vessel Cyl sph Cyl i ndr i calI nt er nal Cor r osi on Al l owance Cas 0. 0000 mm.Vessel Di amet er Dv 36012. 000 mm.Vessel Thi ckness Tv 12. 000 mm.

Desi gn Temperat ure 82. 00 CVessel Mat eri al SA- 283 CVessel UNS Number K02401Vessel Col d S. I . Al l owabl e Smc 137. 00 N. / mmVessel Hot S. I . Al l owabl e Smh 137. 00 N. / mm

At t achment Type Type Rect angul arPar amet er C11 C11 214. 40 mm.Par amet er C22 C22 290. 00 mm.

Thi ckness of Rei nf or ci ng Pad Tpad 15. 000 mm.

Pad Par amet er C11P C11p 1530. 000 mm.Pad Par amet er C22P C22p 1000. 000 mm.

Desi gn I nt ernal Pressur e Dp 0. 000 KPa.I ncl ude Pressur e Thr ust No

External Forces and Moments in WRC 107 Convention:Radi al Load ( SUS) P 0. 0 Kgf Longi t udi nal Shear ( SUS) Vl 15000. 0 Kgf Ci r cumf erent i al Shear ( SUS) Vc 0. 0 Kgf Ci r cumf er ent i al Moment ( SUS) Mc 0. 0 Kg- m.Longi t udi nal Moment ( SUS) Ml 7500. 0 Kg- m.

Tor si onal Moment ( SUS) Mt 0. 0 Kg- m.

Use I nt eract i ve Cont r ol NoWRC107 Ver si on Ver si on Mar ch 1979

I ncl ude Pressur e St r ess I ndi ces per Di v. 2 NoComput e Pr essur e St r ess per WRC- 368 No

WRC 107 Stress Calculation for SUStained loads:

Radi al Load P 0. 0 Kgf Ci r cumf erent i al Shear VC 0. 0 Kgf Longi t udi nal Shear VL 15000. 0 Kgf Ci r cumf er ent i al Moment MC 0. 0 Kg- m.Longi t udi nal Moment ML 7500. 0 Kg- m.

Tor si onal Moment MT 0. 0 Kg- m.

Di mensi onl ess Par amet er s used : Gamma = 300. 00 ( 666. 94)

Dimensionless Loads for Cylindrical Shells at Attachment Junction:- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Curves r ead f or 1979 Bet a Fi gur e Val ue Locat i on- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -N( PHI ) / ( P/ Rm ) 0. 008 4C ! 60. 865 ( A, B)N( PHI ) / ( P/ Rm ) 0. 008 3C ! 61. 826 ( C, D)M( PHI ) / ( P ) 0. 007 2C1 ! 0. 103 ( A, B)M( PHI ) / ( P ) 0. 007 1C ! 0. 150 ( C, D)N( PHI ) / ( MC/ ( Rm**2 * Bet a) ) 0. 007 3A ! 1. 307 ( A, B, C, D)M( PHI ) / ( MC/ ( Rm * Bet a) ) 0. 007 1A ! 0. 099 ( A, B, C, D)N( PHI ) / ( ML/ ( Rm**2 * Bet a) ) 0. 007 3B ! 5. 450 ( A, B, C, D)M( PHI ) / ( ML/ ( Rm * Bet a) ) 0. 007 1B ! 0. 054 ( A, B, C, D)

N( x) / ( P/ Rm ) 0. 007 3C ! 62. 315 ( A, B)N( x) / ( P/ Rm ) 0. 007 4C ! 61. 100 ( C, D)

M( x) / ( P ) 0. 008 1C1 ! 0. 192 ( A, B)


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M( x) / ( P ) 0. 008 2C ! 0. 100 ( C, D)N( x) / ( MC/ ( Rm** 2 * Bet a) ) 0. 007 4A ! 1. 325 ( A, B, C, D)M( x) / ( MC/ ( Rm * Beta) ) 0. 007 2A ! 0. 057 ( A, B, C, D)N( x) / ( ML/ ( Rm** 2 * Bet a) ) 0. 007 4B ! 1. 848 ( A, B, C, D)M( x) / ( ML/ ( Rm * Bet a) ) 0. 007 2B ! 0. 079 ( A, B, C, D)

Note - The ! mark next to the figure name denotes curve value exceeded.

St r ess Concent r ati on Fact ors Kn = 1. 00, Kb = 1. 00

Stresses in the Vessel at the Attachment Junction- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

| St r ess Val ues at Type of | ( N. / mm )

- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -St r ess Load| Au Al Bu Bl Cu Cl Du Dl- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Ci r c. Memb. P | 0 0 0 0 0 0 0 0Ci r c. Bend. P | 0 0 0 0 0 0 0 0

Ci r c. Memb. MC | 0 0 0 0 0 0 0 0Ci r c. Bend. MC | 0 0 0 0 0 0 0 0Ci r c. Memb. ML | - 5 - 5 5 5 0 0 0 0Ci r c. Bend. ML | - 278 278 278 - 278 0 0 0 0

| Tot . Ci r c. St r . | - 284. 7 273. 0 284. 7 - 273. 0 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Long. Memb. P | 0 0 0 0 0 0 0 0Long. Bend. P | 0 0 0 0 0 0 0 0Long. Memb. MC | 0 0 0 0 0 0 0 0Long. Bend. MC | 0 0 0 0 0 0 0 0Long. Memb. ML | - 2 - 2 2 2 0 0 0 0Long. Bend. ML | - 383 383 383 - 383 0 0 0 0

| Tot . Long. St r . | - 385. 9 381. 1 385. 9 - 381. 1 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Shear VC | 0 0 0 0 0 0 0 0Shear VL | 0 0 0 0 - 9 - 9 9 9Shear MT | 0 0 0 0 0 0 0 0

| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 9. 4 - 9. 4 9. 4 9. 4

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 385. 88 381. 14 385. 88 381. 14 18. 79 18. 79 18. 79 18. 79

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Di mensi onl ess Par amet er s used : Gamma = 300. 00 ( 1500. 00)Dimensionless Loads for Cylindrical Shells at Pad edge:- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Curves r ead f or 1979 Bet a Fi gure Val ue Locat i on- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -N( PHI ) / ( P/ Rm ) 0. 034 4C ! 52. 534 ( A, B)

N( PHI ) / ( P/ Rm ) 0. 034 3C ! 45. 764 ( C, D)M( PHI ) / ( P ) 0. 039 2C1 ! 0. 081 ( A, B)M( PHI ) / ( P ) 0. 039 1C ! 0. 126 ( C, D)N( PHI ) / ( MC/ ( Rm**2 * Bet a) ) 0. 037 3A ! 8. 532 ( A, B, C, D)M( PHI ) / ( MC/ ( Rm * Bet a) ) 0. 037 1A ! 0. 095 ( A, B, C, D)N( PHI ) / ( ML/ ( Rm**2 * Bet a) ) 0. 032 3B ! 27. 412 ( A, B, C, D)M( PHI ) / ( ML/ ( Rm * Bet a) ) 0. 033 1B ! 0. 054 ( A, B, C, D)

N( x) / ( P/ Rm ) 0. 038 3C ! 43. 331 ( A, B)N( x) / ( P/ Rm ) 0. 038 4C ! 51. 149 ( C, D)M( x) / ( P ) 0. 036 1C1 ! 0. 140 ( A, B)M( x) / ( P ) 0. 036 2C ! 0. 089 ( C, D)N( x) / ( MC/ ( Rm** 2 * Bet a) ) 0. 037 4A ! 11. 521 ( A, B, C, D)M( x) / ( MC/ ( Rm * Bet a) ) 0. 036 2A ! 0. 056 ( A, B, C, D)N( x) / ( ML/ ( Rm**2 * Bet a) ) 0. 032 4B ! 7. 734 ( A, B, C, D)

M( x) / ( ML/ ( Rm * Bet a) ) 0. 032 2B ! 0. 077 ( A, B, C, D)


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Stresses in the Vessel at the Edge of Reinforcing Pad- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -St r ess Load| Au Al Bu Bl Cu Cl Du Dl- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Ci r c. Memb. P | 0 0 0 0 0 0 0 0Ci r c. Bend. P | 0 0 0 0 0 0 0 0Ci r c. Memb. MC | 0 0 0 0 0 0 0 0Ci r c. Bend. MC | 0 0 0 0 0 0 0 0Ci r c. Memb. ML | - 17 - 17 17 17 0 0 0 0Ci r c. Bend. ML | - 281 281 281 - 281 0 0 0 0

|

Tot . Ci r c. St r . | - 299. 1 264. 4 299. 1 - 264. 4 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Long. Memb. P | 0 0 0 0 0 0 0 0Long. Bend. P | 0 0 0 0 0 0 0 0Long. Memb. MC | 0 0 0 0 0 0 0 0Long. Bend. MC | 0 0 0 0 0 0 0 0Long. Memb. ML | - 3 - 3 3 3 0 0 0 0Long. Bend. ML | - 406 406 406 - 406 0 0 0 0

| Tot . Long. St r . | - 409. 4 403. 1 409. 4 - 403. 1 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 6. 1 - 6. 1 6. 1 6. 1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 409. 39 403. 06 409. 39 403. 06 12. 26 12. 26 12. 26 12. 26

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

WRC 107 Stress Summations:

Vessel Stress Summation at Attachment Junction- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Type of | St r ess Val ues atSt r ess I nt . | ( N. / mm )

- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Locat i on | Au Al Bu Bl Cu Cl Du Dl

- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Ci r c. Pm( SUS) | 0 0 0 0 0 0 0 0Ci r c. Pl ( SUS) | - 5 - 5 5 5 0 0 0 0Ci r c. Q ( SUS) | - 278 278 278 - 278 0 0 0 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Long. Pm ( SUS) | 0 0 0 0 0 0 0 0Long. Pl ( SUS) | - 2 - 2 2 2 0 0 0 0Long. Q ( SUS) | - 383 383 383 - 383 0 0 0 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Shear Pm ( SUS) | 0 0 0 0 0 0 0 0Shear Pl ( SUS) | 0 0 0 0 - 9 - 9 9 9Shear Q ( SUS) | 0 0 0 0 0 0 0 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm ( SUS) | 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm+Pl ( SUS) | 5. 8 5. 8 5. 8 5. 8 18. 8 18. 8 18. 8 18. 8- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm+Pl +Q ( Tot al ) | 385. 9 381. 1 385. 9 381. 1 18. 8 18. 8 18. 8 18. 8

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Type of | Max. S. I . S. I . Al l owabl e | Resul t

St r ess I nt . | N. / mm |- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm ( SUS) | 0. 00 137. 00 | PassedPm+Pl ( SUS) | 18. 79 205. 50 | PassedPm+Pl +Q ( TOTAL) | 385. 88 411. 00 | Passed- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


Vessel Stress Summation at Reinforcing Pad Edge- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Ci r c. Pm( SUS) | 0 0 0 0 0 0 0 0Ci r c. Pl ( SUS) | - 17 - 17 17 17 0 0 0 0

Ci r c. Q ( SUS) | - 281 281 281 - 281 0 0 0 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Long. Pm ( SUS) | 0 0 0 0 0 0 0 0Long. Pl ( SUS) | - 3 - 3 3 3 0 0 0 0Long. Q ( SUS) | - 406 406 406 - 406 0 0 0 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Shear Pm ( SUS) | 0 0 0 0 0 0 0 0Shear Pl ( SUS) | 0 0 0 0 - 6 - 6 6 6Shear Q ( SUS) | 0 0 0 0 0 0 0 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm ( SUS) | 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm+Pl ( SUS) | 17. 3 17. 3 17. 3 17. 3 12. 3 12. 3 12. 3 12. 3- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pm+Pl +Q ( Tot al ) | 409. 4 403. 1 409. 4 403. 1 12. 3 12. 3 12. 3 12. 3- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



PV Elite is a trademark of Intergraph CADWorx & Analy sis Solu tion s, Inc. 2011


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Inner shell c antilever beamInput Echo, WRC107 Item 2, Description: Beam inshell

















M( x) / ( P ) 0. 010 1C1 ! 0. 192 ( A, B)


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M( x) / ( P ) 0. 010 2C ! 0. 100 ( C, D)N( x) / ( MC/ ( Rm** 2 * Bet a) ) 0. 009 4A ! 1. 325 ( A, B, C, D)M( x) / ( MC/ ( Rm * Bet a) ) 0. 009 2A ! 0. 057 ( A, B, C, D)N( x) / ( ML/ ( Rm** 2 * Bet a) ) 0. 010 4B ! 2. 639 ( A, B, C, D)M( x) / ( ML/ ( Rm * Bet a) ) 0. 009 2B ! 0. 079 ( A, B, C, D)








| Tot . Long. St r . | - 334. 5 327. 2 334. 5 - 327. 2 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 7. 8 - 7. 8 7. 8 7. 8

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 334. 55 327. 18 334. 55 327. 18 15. 61 15. 61 15. 61 15. 61

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



N( x) / ( P/ Rm ) 0. 029 3C ! 48. 355 ( A, B)N( x) / ( P/ Rm ) 0. 029 4C ! 53. 969 ( C, D)M( x) / ( P ) 0. 029 1C1 ! 0. 160 ( A, B)M( x) / ( P ) 0. 029 2C ! 0. 100 ( C, D)N( x) / ( MC/ ( Rm**2 * Bet a) ) 0. 029 4A ! 8. 625 ( A, B, C, D)M( x) / ( MC/ ( Rm * Bet a) ) 0. 029 2A ! 0. 057 ( A, B, C, D)N( x) / ( ML/ ( Rm**2 * Bet a) ) 0. 029 4B ! 7. 238 ( A, B, C, D)



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|


| Tot . Long. St r . | - 277. 4 267. 7 277. 4 - 267. 7 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 4. 6 - 4. 6 4. 6 4. 6

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 277. 41 267. 73 277. 41 267. 73 9. 19 9. 19 9. 19 9. 19

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -






- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


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PV Elit e is a trademark of Intergr aph CADWorx & Analy sis Solu tion s, Inc. 2011


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5.3 OPENING STIFFENER CALCULATION

Outer shell stiffener:


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Inner shell stiffener:


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5.4 CLEAN OUT DOOR CALCULATION

Outer shell COD:

BS/EN 14015: 2004: O.1.3 Flush-type clean-out doors with plate reinforcement


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e 1 : 12.5 mm

Reinforcement plate material: A-283 Gr.C

e r: 12.5 +3: 15.5 mm, we selected 16 mm for reinforcement plate

H: 9,800 mm: 9.8 m

e br : 25.04 mm, we selected 30 mm for bottom reinforcing plate selected material isSA 516 Gr.70N

e f : 18.64 mm, we selected 25 mm for cover and bolting plate


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Inner shell COD:

BS/EN 14015: 2004: O.1.3 Flush-type clean-out doors with plate reinforcement


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e 1 : 6 mm

Reinforcement plate material: A-283 Gr.C

e r: 6 + 3: 9 mm, we selected 10 mm for reinforcement plate

H: 10,650 mm: 10.65 m

e br : 25.86 mm, we selected 30 mm for bottom reinforcing plate selected material isSA 516 Gr.70N

e f : 19.3 mm, we selected 25 mm for cover and bolting plate


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1 INTRODUCTION

This calculation book consist of strength analysis required for the repair of tank T-4804 at Marmul production station for Petroleum Development OmanLLC hereafter referred as Purchaser / Owner / Company.

The extent of repair under this calculation book includes partial floor plate,clean out door, opening reinforcement and required beam for shell plate jackup.

1.1 Project Background

Concentric double wall wash tank T-4804, with nominal diameter of 36000mm outer / 27500 mm inner and 9800 mm outer height / 10650 mm inner

height with the capacity of 8040 m3

located in NIMR production station. Tankrequired partial floor plate replacement including replacement of clean outdoors and reinforcement of opening on both shell.

In order to replace the annular plates under the shell, shell shall be lifted byusing hydraulic jacks with twenty four numbers of cantilever beams weldedto the shell.

1.2 Reference Drawing

NIM-48-110239-MS-4018-00001-0001/2 General Arrangement DWG for

T-4804

NIM-48-110239-MX-4024-00001-0001 Detail of bottom plate T-4804

NIM-48-110239-MX-2580-00001-0001 Detail of COD (Outer shell) T-4804

NIM-48-110239-MX-2580-00002-0001 Detail of COD (Inner shell) T-4804

NIM-48-110239-MX-2580-00003-0001 Detail of Opening reinforcement T-4804

1.3 Abbreviations

The below abbreviations are adopted in this requisition

API

ASTM

American Petroleum Institute

American Society For Testing Materials

AVME Approved Vendors of Materials and Equipment


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WG-CCC

PDO

ASMEBS

SP

DEP

AISC

ASD

EN

WRC

Wood Group CCC Ltd.

Petroleum Development Oman LLC

American Society of Mechanical EngineersBritish Standard

Specification

Design Engineering Practice

American Institute of Steel Construction

Allowable Strength Design

European Norm

Welding research council

2 SUMMARY OF WORKS

2.1 Methodology

The main method is used in calculation of beams, pads, reinforcement arethe principal mechanical strength calculation from the references introducedin Para. 4.0 herein.

2.2 Holds

There is not any HOLD point for the calculation.

2.3 Assumptions

- Shell, roof, structure assumed not corroded and all the loads calculatedfor the jacking purpose are for a new tank.

- Roof truss are supported by inner shell only.- Tank is stable against wind condition and no calculation is performed for

the wind stability check as per Purchaser instruction.

- Design code is as per DEP 34.51.01.31-Gen and EN14015.

- Repair works is as per API 653.

- Inner shell lifting beam is designed considering Max. jack lifting capacityof 12 Ton.


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- Outer shell lifting beam is designed considering max. jack lifting capacityof 15 Ton.

- Thickness of reinforcing pad for outer shell jack up beam is assumed as

15 mm in calculation while used thickness is 20 mm.

- Thickness of reinforcing pad for inner shell jack up beam is assumed as10 mm in calculation while used thickness is 20 mm. 10 mm thk. Innerpad is welded to shell to increase shell thickness locally.

3 SUMMARY OF RESULTS

Summary of results are as below:

- Tank shell lifting beam size is HD 260 x 172 for inner and outer shell

- Since the annular of outer tank will be repaired partially while inner tankwill be undergone complete annular plate replacement, Tank shell liftingbeam quantity will be 24 No.s for inner and 8 No.s for outer shell.

- Tank shell opening reinforcement beam size is HD 320 x 245 for bothinner and outer shell.

4 LEGISLATION, CODES, STANDARDS &REFERENCES

4.1 General

All listed documents shall be the latest issue. The international standardsshall be read in conjunction with the corresponding DEP amendment.

4.2 Shell Group Standards (DEP ver. 34):

DEP 00.00.06.06-Gen - Index of standard drawings

DEP 00.00.20.10-Gen. - The Use of SI Quantities.

DEP 34.51.01.33-Gen Above ground vertical storage tanks (Amendments

to API 650)DEP 34.51.01.31-Gen Vertical steel storage tanks - Selection design and

construction (amendments/supplements to EN14015)

4.3 International Standards:

ASME SEC II, Ed.2010, Add.2011 Materials

API 650, Ed.2011 Welded tank for oil storage

API 653, Ed.2009 Tank inspection, repair, reconstruction and alteration


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BS/EN 14015, Ed.2004 Specification for the design and manufacture of sitebuilt, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks forthe storage of liquids at ambient temperature and above

4.4 Handbook:- Roark Formulas for Stress and Strain, Warren C. Young, Richard G.

Budynas, Sixth Ed.

- Pressure Vessel Design manual, Dennis R. Moss, Third Ed.

- AISC Manual of Steel Construction, ASD, 9th Edition, 1989.

- P ressure vessel design handbook, Henry H. Bednar,

4.5 Language and Units of Measurement

The English language and the SI system in accordance withDEP.00.00.20.10-Gen of units shall be used throughout for all documentationand drawings. Where necessary for a specific application, alternative unitsmay be indicated in brackets together with the SI units.

5 CALCULATION SHEET

5.1 Lif ting Beam Calculation for Jack Up

The beam size used for the cantilever beam is HD 260X172:

Outer shell c antilever beam


M: 15,000 x 0.5 x 9.81 = 73,575 N.m

Z: 2,159,000 mm 3

Bending stress: 34 Mpa < 165 Mpa (0.6*F y), OK

Inner shell c antilever beam


M: 12,000 x 0.5 x 9.81 = 58,860 N.m


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Z: 2,159,000 mm 3

Bending stress: 27.2 Mpa


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- Load with torque T:

where:

Aw ... weld throat area [mm 2, in 2]Iw ... moment of inertia of the weld [mm 4, in 4]

J w ... polar moment of inertia of the weld [mm 4, in 4]s ^ ... normal stress vertical to the weld direction [MPa, psi]s ll ... normal stress parallel to the weld direction [MPa, psi]t^ ... shear stress vertical to the weld direction [MPa, psi]t ll ... shear stress parallel to the weld direction [MPa, psi]

For connections stressed by combined load, the resulting "equivalent" stress in the

weld is specified from the relation:

Which for s ll=0 can be adjusted as:

The sectional properties for the selected basic shapes of weld groups can be foundin the following table. In order to specify the polar moment of inertia of the weld, youcan use the following relation:

Where:

a.... Weld throat thickness [mm, in]: 15 * 0.707: 10.6 mm

B.... Width of weld group [mm, in]: 268 mm

D.... Weld diameter [mm, in]: 15 mm

H.... Height of weld group [mm, in]: 225 mm

L.... Weld length [mm, in]: Not applicable

s.... Flange thickness [mm, in]: 32.5 mm

t.... Web thickness [mm, in]: 18 mm

ryHalf of the height [mm, in]: 145 mm


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Aw: 2 * 10.6 * (225+268-2*18): 9688.4 mm 2

IwX : 90,823,094.8 mm 4


Ref.: Pressure vessel design handbook, Henry H. Bednar, Section 10.0Weld design

F y: 15,000 kg: 147,150 N (Calculation for the worse case outer shell only)

- Shear force: 15.2 Mpa < 0.4 * F y (92) Mpa OK

M: 15,000 x 0.5: 7500 kg.m (Calculation for the worse case outer shell only)

- Bending moment: 117.5 Mpa < 0.6 * F y (137) Mpa OK

- Load Combination: 118.4 Mpa < 0.6 * F y (137) Mpa OK

Weld attachment between pad and shell

H: 1000 / 800 mm (Outer / Inner)

B: 1530 / 800 mm (Outer / Inner)

a: 14 x 0.707 / 6 x 0.707: 9.9 / 4.2 mm (Outer / Inner)

Aw: 50,084 / 13,574 mm 2 (Outer / Inner)

IwX : 9,372,520,490 / 1,459,493,232 mm 4 (Outer / Inner)

F y: 15,000 / 12000 kg (Outer / Inner)


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- Shear force: 2.9 / 8.67 Mpa (Outer / Inner) < 0.4 * F y (92) Mpa OK

M: 7500 / 6000 kg.m (Outer / Inner)

- Bending moment: 3.93 / 16.13 Mpa (Outer / Inner) < 0.6 * F y (137) Mpa OK

- Load Combination: 4.9 / 18.3 Mpa (Outer / Inner) < 0.6 * F y (137) Mpa OK


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Figure 5.1 Lifting bracket with pad plate for inner tank


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Figure 5.2 Lifting bracket with pad plate for out er tank


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5.2 Beam Reinforcement Pad Calculation:

At tachment parameter

- Pressure Vessel Design manual, Dennis R. Moss, Third Ed. Procedure5.3, attachment parameter

2C1: 0.8*b: 0.8*268: 214.4 mm

2C2: h: 290 mm


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Outer shell c antilever beamInput Echo, WRC107 Item 1, Description: Beam outshell

















M( x) / ( P ) 0. 008 1C1 ! 0. 192 ( A, B)


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M( x) / ( P ) 0. 008 2C ! 0. 100 ( C, D)N( x) / ( MC/ ( Rm** 2 * Bet a) ) 0. 007 4A ! 1. 325 ( A, B, C, D)M( x) / ( MC/ ( Rm * Beta) ) 0. 007 2A ! 0. 057 ( A, B, C, D)N( x) / ( ML/ ( Rm** 2 * Bet a) ) 0. 007 4B ! 1. 848 ( A, B, C, D)M( x) / ( ML/ ( Rm * Bet a) ) 0. 007 2B ! 0. 079 ( A, B, C, D)








| Tot . Long. St r . | - 385. 9 381. 1 385. 9 - 381. 1 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 9. 4 - 9. 4 9. 4 9. 4

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 385. 88 381. 14 385. 88 381. 14 18. 79 18. 79 18. 79 18. 79

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



N( x) / ( P/ Rm ) 0. 038 3C ! 43. 331 ( A, B)N( x) / ( P/ Rm ) 0. 038 4C ! 51. 149 ( C, D)M( x) / ( P ) 0. 036 1C1 ! 0. 140 ( A, B)M( x) / ( P ) 0. 036 2C ! 0. 089 ( C, D)N( x) / ( MC/ ( Rm** 2 * Bet a) ) 0. 037 4A ! 11. 521 ( A, B, C, D)M( x) / ( MC/ ( Rm * Bet a) ) 0. 036 2A ! 0. 056 ( A, B, C, D)N( x) / ( ML/ ( Rm**2 * Bet a) ) 0. 032 4B ! 7. 734 ( A, B, C, D)



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|


| Tot . Long. St r . | - 409. 4 403. 1 409. 4 - 403. 1 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 6. 1 - 6. 1 6. 1 6. 1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 409. 39 403. 06 409. 39 403. 06 12. 26 12. 26 12. 26 12. 26

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -






- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


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PV Elite is a trademark of Intergraph CADWorx & Analy sis Solu tion s, Inc. 2011


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Inner shell c antilever beamInput Echo, WRC107 Item 2, Description: Beam inshell

















M( x) / ( P ) 0. 010 1C1 ! 0. 192 ( A, B)


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M( x) / ( P ) 0. 010 2C ! 0. 100 ( C, D)N( x) / ( MC/ ( Rm** 2 * Bet a) ) 0. 009 4A ! 1. 325 ( A, B, C, D)M( x) / ( MC/ ( Rm * Bet a) ) 0. 009 2A ! 0. 057 ( A, B, C, D)N( x) / ( ML/ ( Rm** 2 * Bet a) ) 0. 010 4B ! 2. 639 ( A, B, C, D)M( x) / ( ML/ ( Rm * Bet a) ) 0. 009 2B ! 0. 079 ( A, B, C, D)








| Tot . Long. St r . | - 334. 5 327. 2 334. 5 - 327. 2 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 7. 8 - 7. 8 7. 8 7. 8

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 334. 55 327. 18 334. 55 327. 18 15. 61 15. 61 15. 61 15. 61

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



N( x) / ( P/ Rm ) 0. 029 3C ! 48. 355 ( A, B)N( x) / ( P/ Rm ) 0. 029 4C ! 53. 969 ( C, D)M( x) / ( P ) 0. 029 1C1 ! 0. 160 ( A, B)M( x) / ( P ) 0. 029 2C ! 0. 100 ( C, D)N( x) / ( MC/ ( Rm**2 * Bet a) ) 0. 029 4A ! 8. 625 ( A, B, C, D)M( x) / ( MC/ ( Rm * Bet a) ) 0. 029 2A ! 0. 057 ( A, B, C, D)N( x) / ( ML/ ( Rm**2 * Bet a) ) 0. 029 4B ! 7. 238 ( A, B, C, D)



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|


| Tot . Long. St r . | - 277. 4 267. 7 277. 4 - 267. 7 0. 0 0. 0 0. 0 0. 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


| Tot . Shear | 0. 0 0. 0 0. 0 0. 0 - 4. 6 - 4. 6 4. 6 4. 6

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Str . I nt. | 277. 41 267. 73 277. 41 267. 73 9. 19 9. 19 9. 19 9. 19

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -






- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


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St r ess I nt . | N. / mm |- - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

tank lifting calculations

Documents