GB 50341-2014Code for design of vertical cylindrical welded steel oil tanks (English PDF)

Foreword

According to the requirements of Ministry of Housing and Urban-Rural Development in

Notice on Printing Development and Revision Plan of National Engineering Construction

Standards and Codes in 2011 (JIANBIAO [2011] No. 17), the code drafting group

summarizes experience from GB 50341-2003 Code for Design of Vertical Cylindrical Welded

Steel Oil Tanks, refers to relevant international and foreign advanced standards and revises

this code based on extensive investigation and solicitation of opinions, discussion and

modification.

This code covers the design of vertical cylindrical welded steel oil tanks in following

main technical aspects, including materials, bottom design, shell design, fixed roof, floating

roof, internal floating roof, appurtenances, wind stable calculation and anchorage design of oil

tank, tank for small internal pressures, design of storage tank for external pressure,

requirements for tank operating at elevated temperatures, seismic design of oil tank, basic

requirement of foundation and basis for oil tank, load combinations, variable-design-point

method on tank shell thickness calculation, calculation for spherical dome roof with rib

reinforcement, allowable external loads on shell openings.

There have been some significant changes in this code in the following technical aspects.

1 Chapter 11 "Wind Stable Calculation and Anchorage Design of Oil Tank", Appendix B

"Design of Storage Tank for External Pressure", Appendix F "Load Combinations", Appendix

G "Variable-design-point Method on Tank Shell Thickness Calculation" and Appendix J

"Allowable External Loads on Shell Opening" are added;

2 Design negative pressure of atmospheric pressure storage tank is revised; positive

design pressure of fixed-roof oil tank is increased to 18kPa and the maximum design negative

pressure is increased to 6.9kPa;

3 Allowable stress of materials is revised; materials of Q235-A.F, Q235-A, Q345-C,

Q345-D, 15MnNbR, 07MnNiCrMoVDR are removed;

4 Minimum sketch bottom plate's thickness and lap width limit between bottom plates

are revised; extension limit of sketch bottom plates is adjusted;

5 Liquid level and welded joint coefficient are revised in the formula for calculating

shell thickness by fixed-design-point method;

6 Calculation formula for top wind girder section modulus is revised;

7 When fixed-roof oil tank roof and shell use weakly connected structure, the

requirements, roof thickness and calculation formula of effective sectional area are revised;

support guide support structure form and requirements of supporting cone roof and monolayer

spherical latticed shell requirements are added;

8 The requirements by which the floating roof structure design shall comply, limitation

of floating roof compartment to meet the tightness requirements, the relevant requirements of

peripheral seals and static extracting devices are revised; the relevant requirements of wax

scrapers are added;

9 Electrical continuity and static extracting of internal floating roof are revised; the

relevant requirements of compartment welding are added;

10 Specification and dimension of nozzle reinforcement plate, flanged connection shell

1 General Provisions

2 Terms

1 Self-supporting cone roof. with circular cone roof and supported only by the shell

periphery;

2 Column-supported cone roof. with circular cone roof and supported by shell, girder,

column or other structure;

3 Self-supporting dome roof. with spherical roof and supported only by the shell

periphery.

1 Sing...

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