API600-2021影响评估记录.docx

条款 旧版 新版 除对技术规范外的影响 Special Notes 增加：The use of API publications is voluntary. In some cases, third parties or authorities having jurisdiction may choose to incorporate API standards by reference and may mandate compliance. API 出版物的使用是自愿的。 在某些情况下，具有管辖权的第三方或当局可以选择通过引用纳入 API 标准，并可以强制要求遵守 Foreword 增加：May: As used in a standard, “may” denotes a course of action permissible within the limits of a standard. 可能：在标准中使用时，“可能”表示在标准范围内允许的行动过程。 Can: As used in a standard, “can” denotes a statement of possibility or capability. Can：在标准中使用时，“can”表示可能性或能力的陈述。 1范围 If product is supplied bearing the API Monogram and manufactured at a facility licensed by API, the requirements of Annex A apply. 如果提供的产品带有 API 会标并在 API 许可的设施中制造，则要求附录 A 适用。 变更：This edition of API 600 states values in both metric and U.S. Customary units of measurement. These systems of units are to be regarded separately. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems constitutes nonconformance with this standard. 此版本的 API 600 以公制和美国惯用计量单位规定值，这些系统的单位要分开考虑。 每个系统中规定的值并不完全相同； 所以，每个系统应相互独立使用。 结合来自两个系统的值构成不符合本标准。 2规范性引用文件 ISO15649 取消：ISO 15649 新增：MSS SP-134 4.5 Double seated valves, in some design configurations, may be capable of trapping liquid in the center cavity of the valve when in the closed position. If subjected to an increase in temperature, an excessive build-up of pressure can occur, which may result in a pressure boundary failure. Where such a condition is possible, it is the responsibility of the user to provide or require to be provided, means in design, installation, or operating procedure, to assure that the pressure in the valve does not exceed that allowed by this standard for the resultant temperature. 4.5 双座阀，在某些设计配置中，可能能够将液体截留在中心腔中阀门处于关闭位置时。 如果温度升高，压力会过度增加可能会发生，这可能会导致压力边界失效。 如果可能出现这种情况，则由用户负责或要求提供、设计、安装或操作程序中的手段，以确保阀门中的压力不超过本标准所允许的最终温度。 取消4.5，变更为注： NOTE For valves capable of trapping fuid,