范围1。1本标准适用于管道压力调节器（见第3条，定义），完全由新的、未使用的零件和材料（以下简称调节器）构成，单独或与过压保护装置（以下简称装置）组合使用，用于服务调节器之间的气体管道系统，或2 psi（13.8 kPa）的液化石油气服务调节器，以及气体利用设备。1.2本标准适用于使用天然气、人造气和混合气、液化石油气和液化石油气-空气混合物的调节器。1.3本标准适用于根据入口和出口压力的预期用途分类的调节器。 1.4本文规定的试验在77±10°F（25±5.5°C）的室温下进行。符合本标准规定的调节器和通风限制器的工作温度范围为32°F（0°C）至125°F（51.5°C）。制造商可选择规定更大的工作温度范围，在这种情况下，将进行第5.4条“泄漏”和第5.10条“持续运行”中概述的附加试验。1.5如果本标准中给出的测量值后跟其他单位的等效值，则第一个规定值应视为规范值。 1.6除非另有规定，否则本标准中提及的所有psi均应视为表压。1.7第2条“参考出版物”包含本标准中特别引用的标准列表。1.8第8条“加拿大独有的项目”包含加拿大独有的条款。1.9在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。 注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附录设计为规范性（强制性）或信息性（非强制性）以定义其应用。

Scope1.1This Standard applies to line pressure regulators (see Clause 3, Definitions), constructed entirely of new, unused parts and materials, hereinafter referred to as regulator(s), either individual or in combination with overpressure protection devices, hereinafter referred to as device(s), intended for application in gas piping systems between the service regulator, or LP-gas 2 psi (13.8 kPa) service regulator, and the gas utilization equipment.1.2This Standard applies to regulators for operation with natural, manufactured and mixed gases, liquefied petroleum gases, and LP gas-air mixtures.1.3This Standard applies to regulators classified in accordance with their intended application with reference to inlet and outlet pressures.1.4The tests specified herein are conducted at a room temperature of 77 ± 10 °F (25 ± 5.5 °C). Regulators and vent limiters complying with the provisions of this Standard are considered as having an operating temperature range of 32 °F (0 °C) to 125 °F (51.5 °C). At the option of the manufacturer, a greater operating temperature range may be specified, in which case additional tests as outlined in Clause 5.4, Leakage, and Clause 5.10, Continued operation, will be conducted.1.5If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.1.6All references to psi throughout this Standard are to be considered gauge pressures unless otherwise specified.1.7Clause 2, Reference publications, contains a list of standards specifically referenced in this Standard.1.8Clause 8, Items unique to Canada, contains provisions that are unique to Canada.1.9In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designed normative (mandatory) or informative (non-mandatory) to define their application.