APISTANDARD620 DesignandConstructionofLarge Welded Low-pressureStorageTanks 大型焊接低压储罐的设计与建造 TWELFTHEDITION OCTOBER2013 2013年10月第12版 ADDENDUM 1 NOVEMBER2014 2014年11月增补1 ADDENDUM2 APRIL2018 2018年4月增补2 ADDENDUM3 SEPTEMBER2021 2021年9月增补3 译者：gbt8163 2023.05.30
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operating practices. These publications are not intended to obviate the need for applying sound engineering judgment regarding when and where these publications should be utilized.The formulation practices. 出版API是为了促进广泛提供经验证的、健全的工程和操作实践.
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The verbal forms used to express the provisions in this document are as follows. 用于表达本文件规定的口头形式如下.
Shall:As used in a standard "shall denotes a minimum requirement in order to conform to the standard. 应：在标准中，“应”表示符合标准的最低要求.
Should: As used in a standard “should” denotes a remendation or that which is advised but not required in order to conform to the standard. 宜：在标准中，“宜”表示建议或建议但不要求的建议，以符合标准.
May: As used in a standard “may* denotes a course of action permissible within the limits of a standard. 可以：在标准中，“可以”表示在标准限制范围内允许的行动过程.
能够：在标准中，“能够”表示可能性或能力的陈述.
This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an APl standard. Questions of Standards American Petroleum Institute 200 Massachusetts Avenue NW Suite 1100 Washington herein should also be addressed to the director. 本文件是根据API标准化程序编制的，以确保在开发过程中得到适当的通知和参与，并被指定为API 标准.
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Contents 目录 1Scope 范围. 1.1 General概述 1.2Coverage 覆盖范围 1 1.3Limitations 限制 2References参考文献 6 3Definitions 定义. .10 3.1 StressandPressureTerms应力和压力术语. ...1. 3.2 CapacityTerms容量术语.. .10 3.3 Tank Wall 罐壁 ..10 3.4 WeldingTerms焊接术语 11 3.5 ThicknessTerms 厚度术语 13 3.6OtherTerms其他术语. -14 Materials 材料 4.1 General 概述 ..15 4.2Plates 钢板 .17 4.3Pipe，Flanges，Forging and Castings 管道、法兰、锻件和铸件 .24 4.4Boling Material螺栓材料.. .27 4.5Structural Shapes结构型钢. .28 4.6AnchorBoltingMaterial地脚螺栓材料. ..8 5 Design 设计.. ..31 5.1 General概述 .31 5.2Operating Temperature 工作温度 ...31 5.3PressuresUsedinDesign设计中使用的压力 .32 5.4 Loads 载荷. .33 5.5 MaximumAllowableStressforWalls罐壁的最大许用应力.. .35 5.6Maximum Allowable Stress Values for Structural Members and Bolts. 46 结构构件和螺栓的最大允许应力值 5.7 CorrosionAllowance腐惊裕量 ...0 5.8Linings 衬里. .50 5.9Procedure forDesigningTankWalls罐壁设计程序 .50
