GB 50341-2014_English: PDF (GB50341-2014)
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Code for design of vertical cylindrical welded steel oil tanks
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Standard ID | GB 50341-2014 (GB50341-2014) | Description (Translated English) | Code for design of vertical cylindrical welded steel oil tanks | Sector / Industry | National Standard | Classification of Chinese Standard | E98 | Classification of International Standard | 75.180 | Word Count Estimation | 246,228 | Date of Issue | 2014/5/29 | Date of Implementation | 2015/3/1 | Older Standard (superseded by this standard) | GB 50341-2003 | Quoted Standard | GB 50009; GB 50128; GB 50191; GB 50205; GB/T 699; GB/T 700; GB 713; GB/T 985.1; GB/T 985.2; GB/T 1591; GB/T 3077; GB/T 3091; GB/T 3274; GB 3531; GB 6479; GB/T 8163; GB 9948; GB 19189; JB/T 4730.2; JB/T 4730.3; JB/T 4730.4; JB/T 4730.5; NB/T 47008; NB/T 47 | Drafting Organization | China Petroleum Pipeline Engineering Co., Ltd. | Administrative Organization | Petroleum Engineering Construction Standardization Committee | Regulation (derived from) | Ministry of Housing and Urban-Rural Development Bulletin No. 432 | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Ministry of Housing and Urban-Rural Development of the People's Republic of China | Summary | This standard applies to storage pressure petroleum, petrochemical products and other liquid-like and near atmospheric pressure vertical cylindrical steel welded oil storage tank design, does not apply to underground storage and high degree of toxicity is | Standard ID | GB 50341-2003 (GB50341-2003) | Description (Translated English) | Code for design of vertical cylindrical welded steel oil tanks [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China] | Sector / Industry | National Standard | Classification of Chinese Standard | E98 | Word Count Estimation | 170,123 | Date of Issue | 2003-10-08 | Date of Implementation | 2003-12-01 | Quoted Standard | GB/T 699; GB/T 700; GB/T 709; GB 985; GB 986; GB/T 1591; GB/T 3077; GB/T 3092; GB/T 3274; GB 3531; GB 5293; GB 6479; GB 6654; GB 19189; GB/T 8163; GB/T 12470; GB/T 5117; GB/T 5118; GB/T 14957; JB 4726; JB 4727; GB 50009-2001 | Adopted Standard | API 650, NEQ | Drafting Organization | China Petroleum Pipeline Engineering Co., Ltd. | Summary | This Chinese standard applies only to store oil, petrochemical products and other similar liquids at atmospheric pressure (including micro- pressure) vertical cylindrical steel welded tank design. |
GB 50341-2014
UDC GB
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
P GB 50341-2014
Code for Design of Vertical Cylindrical Welded Steel Oil Tanks
ISSUED ON. MAY 29, 2014
IMPLEMENTED ON. MARCH 1, 2015
Jointly issued by. Ministry of Housing and Urban-Rural Development;
General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China.
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Contents
Foreword ... 6
1 General Provisions ... 8
2 Terms ... 8
3 Basic Requirement ... 9
4 Materials ... 11
4.1 General Requirement ... 11
4.2 Steel Plates ... 12
4.3 Steel Pipe ... 14
4.4 Forgings ... 15
4.5 Screw and Nut ... 17
4.6 Structural Steel ... 17
4.7 Welding Materials ... 18
5 Bottom Design ... 18
5.1 Size of Bottom Plates ... 18
5.2 Bottom Structure ... 19
6 Shell Design ... 22
6.1 Shell Plate's Arrangement and Connection ... 22
6.2 Curb Angle ... 23
6.3 Shell Thickness ... 24
6.4 Wind Girder ... 25
7 Fixed Roof ... 30
7.1 General Requirement ... 30
7.2 Allowable Stress of Structural Components ... 32
7.3 Self-supporting Cone Roof ... 34
7.4 Column-Supported Cone Roof ... 35
7.5 Self-supporting Dome Roof ... 36
8 Floating Roof ... 38
8.1 General Requirement ... 38
8.2 Structure and Connection of Floating Roof ... 39
8.3 Floating Roof Supports ... 39
8.4 Primary Floating Roof Drains ... 40
8.5 Emergency Roof Drains ... 40
8.6 Rolling Ladder and Track... 40
8.7 Automatic Bleeder Vents ... 41
8.8 Guiding Devices ... 41
8.9 Peripheral Seals and Static Extracting Devices ... 41
8.10 Floating Roof Manhole ... 42
8.11 Compartment Manhole ... 42
8.12 Wax Scrapers ... 42
9 Internal Floating Roof ... 42
9.1 General Requirement ... 42
9.2 Open-Top Bulk-Headed, Single-Deck and Double-deck Internal Floating Roof ... 43
9.3 Internal Floating Roof on Floats ... 44
9.4 Internal Floating Roof Supports ... 44
9.5 Peripheral Seals ... 44
9.6 Automatic Bleeder Vents ... 45
9.7 Vents ... 45
9.8 High Liquid Level Protection ... 46
9.9 Guiding Devices ... 46
9.10 Manhole and Inspection Hatches ... 46
10 Appurtenances ... 46
10.1 General Requirement ... 46
10.2 Shell Opening and Reinforcement ... 47
10.3 Shell Manholes ... 48
10.4 Shell Nozzles ... 51
10.5 Flush-type Cleanout Fittings ... 56
10.6 Roof Manholes ... 61
10.7 Roof Nozzles ... 62
10.8 Drain Elbows ... 63
10.9 Water Draw-off Sumps ... 64
10.10 Spiral Stairway, Platforms and Handrails ... 65
10.11 Scaffold Cable Support ... 66
10.12 Protection against Lightning, Static and Others ... 67
11 Wind Stable Calculation and Anchorage Design of Oil Tanks ... 67
11.1 Wind Stable Calculation ... 67
11.2 Anchorage Design ... 69
12 Prefabrication, Assembling, Welding and Inspection ... 71
12.1 Prefabrication, Assembling and Welding ... 71
12.2 Non-destructive Testing and Tests of Welding Seam ... 72
12.3 Geometry and Dimension Inspection ... 75
12.4 Water Filling Test ... 77
12.5 Fixed Roof Test ... 78
Appendix A Design of Tank for Small Internal Pressures ... 79
Appendix B Design of Storage Tank for External Pressure ... 83
Appendix C Requirements for Tank Operating at Elevated Temperatures ... 93
Appendix D Seismic Design of Oil Tank ... 95
Appendix E Basic Requirement of Foundation and Basis for Oil Tank ... 102
Appendix F Load Combinations ... 106
Appendix G Variable-design-point Method on Tank Shell Thickness Calculation ... 108
Appendix H Calculation for Spherical Dome Roof with Rib Reinforcement ... 111
Appendix J Allowable External Loads on Shell Openings ... 114
Explanation of Wording in This Code ... 124
List of Quoted Standards ... 125
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
1.0.1 This code is formulated to standardize design of vertical cylindrical welded steel oil
tanks and make it advanced in technology, cost-effective, safe and applicable and high quality.
1.0.2 This code is applicable to design of vertical cylindrical welded steel oil tanks at and
close to normal pressure for storing petroleum and petrochemical and other similar liquid but
it is not applicable to design of buried tank, tank holding extremely and highly hazardous
medium and artificial refrigerant fluid tank.
1.0.3 Design of vertical cylindrical welded steel oil tanks shall comply with not only this
code but the current relevant national standards.
2 Terms
2.0.1 Annular/sketch bottom plates
The outermost bottom plates at the lower part of shell plates.
2.0.2 Annular bottom plates
Annular/sketch bottom plates with polygonal or circular inner edge.
2.0.3 Bottom plates
Bottom plates except edge plate.
2.0.4 Fixed roofs
Roof around which shell ends are fixed and connected, mainly including types as
follows.
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.
2.0.5 Floating roofs
Roof which lifts with the liquid level, including external floating roof, in an open-top oil
tank and internal floating roof, in fixed-roof oil tank. Generally, the floating roof tank refers
to external floating roof tank if not specified. There are major floating roofs as follows.
1 Sing...
......
UDC
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CIDNA
Code for design of vertical cylindrical
welded steel oil tanks
Date of issuing. October 8, 2003 Date of enforcement. December 1~ 2003
Jointly issued by MiDistry of Construction of the People's Republic of China
General Administration of Quality Supervision, Inspection and
Quarantine of the P.R. China
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Code for design of vertical cylindrical
welded steel oil tanks
Editing department in chief. China National Petroleum Corporation
Approval department. Ministry of Construction of the People 's Republic of China
Implementation date. December 1, 2003
BEl JING 2003
NOTICE
This code is written in Chinese and Engli sh. The Chinese text shall be taken as the ruling one
in the event of any inconsistency between the Chinese text and the English text.
Public notice of the Ministry of Construction of the People's
Republic of China
No. 186
Public notice of the Ministry of Construction about issuing the national
standard Code for design of vertical cylindrical welded steel oil tanks
This notice is hereby given that the Code for Design of Vettical Cylindrical Welded Steel Oil
Tanks has been approved to be a national standard, with the number of GB 50341-2003 , and wi ll
be put into operation from Dec I, 2003 . In this standard, atticles 3 .0.2, 3.0.5, 4.2.2, 4.2.5, 5.1.1 ,
5.1.2, 6.3. 1' 6.3 .2, 6.3 .3 , 6.4.1' 6.4.6, 6.4.7' 6.4.8, 6.5.2, 6.5.3 , 6.5.4, 6.5 .6, 7 .1.2, 7 .1.6, 8. 1.5 , 8 .1.6,
8.2.3 and 8.3 . 1 are mandatory provisions, which must be strictly observed.
This code was issued by China Plan Publishing House under the organization of Research
Institute of Standards & Norms, the Ministry of Construction.
Ministry of Construction of the People's Republic of China
October 8, 2003
Foreword
This code was compiled jointly by China Petroleum Pipeline Engineering Corporation (the
former China Petroleum Pipeline Reconnaissance Designing Institute) and Petrochina Plan &
Design Institute according to the requirement of the Notice about Printing and Distributing the
"1995-1996 Plan for Constitution of National Standard for Engineering Construction" issued in
the ( 1996) No. 4 document of the Ministry of Construction.
This code was compiled and finalized referring to relevant specifications at home and abroad
such as API 650, based on in-depth investigation and research and frequent communication with
scientific research , design and construction departments as we ll as the users , adopting the mature
experiences in oil tank design accumulated in the last decades at home and abroad, combining the
actual condition of engineering of China on the current stage, and through comprehensively ask ing
for opinions, repeated discussion and careful modification.
There are altogether eleven chapters and five appendixes in this code, covering the main
contents of the design of vertical cylindrical welded steel oil tanks and part of the requirements for
construction and acceptance. It mainly includes material selection, tank bottom design, tank wall
design, fixed roof design, external floating roof design, internal floating roof design , o il tank
accessory, the additional requirements for the design of micro-internal pressure o il tank and high
temperature oil tank, ribbed vault calculation, anti-vibration calculation and the basic requirements
of oil tank for the groundwork and foundation .
In this code, the provisions indicated with boldface are mandatory provisions; which must be
strictly observed. The Ministry of Construction is responsible for the administration of thi s code
and explanation of the mandatory provisions. China Petroleum Pipeline Engineering Corporation
is responsible for the explanation of the detailed technical contents. The organizations concerned
are requested to send the opinions and suggestions of modification and supplementation obtained
from the engineering practices and experiences to China Petroleum Pipeline Engineering
Corporation (address. No. 22 Jinguang Road , Langfang, Hebei Province; postal code. 065000).
The editing organization in chief, the organizations participated in the compilation and the
main drafters of this code.
The editing organization in chief. China Petro leum Pipeline Engineering Corporation
The organizations participated in compilation. Petrochina Plan & Design Institute
The main drafters. Wang Fuan, Jin Weiang, Sun Zhengguo, Xiang Zhongquan, Xing
Yansheng, Liu Yalan, Cheng Hui, Du Baojun, Fu Weiqing, Wang Ying, Wang Yuqing, Wang
Binghuai, Wang Baoxia, Wang Guoli, Wang Gengwu, Fan Xin, Yin Yeyi, Sun Weili , Xu Jie, Chen
Feng, Dong Xu, Li Zhengyu, Li Jinguo, Qu Yinghua, Meng Qingpeng, Xia Wei , Duan Jinyan, Cai
Hangping
Contents
General ... 1
2 Definitions and symbols ... 2
2.1 Definitions ... 2
2.2 Symbols ... 3
3 General specifications ... _ ... 6
4 Materials ... 7
4.1 General speciftcations ... 7
4.2 Steel plates ... 8
4.3 Steel tubes ... I 0
4.4 Forgings ... I 0
4.5 Bolts and nuts ... !I
4.6 Structural section steel ... 11
4.7 Welding materials -... 11
5 Tank bottmn design ... 12
5.1 Dimension oftank bottom plate ... 12 -
5.2 Structure of tank bottmn ... 12
6 Tank walls design ... 16
6.1 Arranging plates on the wall and linking the walls ... 16
6.2 Taping steel angle ... 16
6.3 Thickness of the tank wall ... 17
6.4 Top wind girder... 18
6.5 Middle wind girder ... 20
7 Fixed roofs ... 23
7.1 General specification ... _ ... 23
7.2 The permissible stress ofcomponent ... 24
7.3 Self supporting conic roof... 26
7.4 Supporting conic roof ... , ... 26
7.5 Self supporting arch roof ...-... 27
8 Floating roofs ... _... ; ... 28
8.1 General specification ... 28
8.2 Structure and connection of the floating roofs ... 28
8.3 Support pole of the floating roofs ... 29
8.4 Drainage pipe of the floating roofs ... 29
8.5 The emergency water discharging equipment... 29
8.6 The rotational floating ladder and track ... 29
8.7 Automatic breather valve ... 30
8.8 Guide apparatus ; ... 30
8.9 Seal and static guiding device ... 30
8. 10 Floating roof access hole ... 30
8.11 Cabin access hole ... 31
9 Internal Floating Roofs ... 32
9.1 General Regulations ... 32
9.2 Internal Floating Roofs of Open Compa1iment Type...
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