API 520-2-2020 泄压装置的尺寸、选择和安装 第2部分：安装（中英文对照）.pdf

API STANDARD 520 PART II SEVENTH EDITION, OCTOBER 2020 Sizing, Selection, and Installation of Pressure-relieving Devices 压装置的尺寸、选择和安装 Part II Installation 第2 部分：安装 Foreword 前言 Nothing contained in any AP I publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent. 任何API 出版物中的任何内容都不应被解释为以暗示或其他方式授予制造、销售或使用专利书 所涵盖的任何方法、仪器或产品的权利。该出版物中的任何内容也不应被解释为对任何人侵犯专利证 书的责任进行保险。 The verbal forms used to express the provisions in this document are as follows. 用来表达本文件中的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. 必须：在标准中使用，“必须”表示符合标准的最低要求。 Should: As used in a standard, should” denotes a recommendation or that which is advised but not required in order to conform to the standard. 宜：在标准中使用，“宜”表示建议或建议但不要求符合标准。 May: As used in a standard, may” denotes a course of action permissible within the limits of a standard. 可以：在标准中使用，“可以”表示在标准的范 内允许的行动方案。 Can: As used in a standard, can” denotes a statement of possibility or capability. 能够：在标准中，“能够”表示一种可能性或能力的陈述。 This document was produced under AP I standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an AP I standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be