1.1范围1。1.1本标准适用于金属结构的手动杠杆操作气体切断阀，其焊接端、法兰端和螺纹端不是压力润滑设计。1.1.2本标准适用于:（a）将气体用于燃料用途的器具和设备，以及（b）在本标准涵盖的压力限制范围内的管道系统中使用的阀门。1.1.3本标准规定了阀门必须具备的最低性能，以便被视为适用于天然气、人造气和液化石油气（以蒸汽形式分布，含或不含空气混合物）或其混合物。 注:本标准涵盖的阀门可用于“沼气”（污水处理过程中产生的甲烷），但由于夹带污染物，其使用须经制造商和买方同意。未经修改（即附加要求），不得在“酸性气体”（含有硫化氢的气体）上使用本标准涵盖的阀门。应咨询制造商的建议以及制造商和买方之间达成的协议。 1.1.4规定了NPS 1/4至8阀门的要求。1.1.5本标准涵盖适用于1.1.6中规定的在0至860 kPa（125 psig）压力范围内使用的阀门，此外，还应承受1290 kPa（187 psig）最大允许压力下的现场压力试验。注:当阀门压力超过额定最大工作压力时，不得移动闭孔器。1.1.6根据第2部分至第6部分中的以下名称和说明，本标准涵盖的所有阀门将受到工作温度和/或特殊规定的限制。 第2-30部分？C到+65？C（-22华氏度至+149华氏度）第3-40部分？C到+65？C（-40华氏度至+149华氏度）第4-60部分？到C+65？C（-76华氏度至+149华氏度）第5-30部分？C到+120？C（-22华氏度至+248华氏度）第6-30部分？C到+180？C（-22华氏度至+356华氏度）1.1.7本标准包含相当于码/磅数量的国际单位制（公制），目的是允许以国际单位制（公制）单位使用标准。如果本标准中给出的测量值后跟其他单位的等效值，则应将第一个规定值视为要求。 给定的等效值可能是近似值。如果测量值和其他单位中的等效值都被规定为报价标记要求，则应提供第一个规定的单位，或同时提供这两个单位。

1.1Scope1.1.1This Standard applies to manual lever operated, gas shut- off valves of metallic construction, with weld and flanged and threaded ends other than pressure lubricated designs.1.1.2This Standard applies to valves used in:(a) appliances and equipment where gas is to be used for fuel purposes and,(b) piping and tubing systems falling within the pressure limitations covered in this Standard.1.1.3This Standard sets forth the minimum capabilities which a valve must possess in order to be considered suitable for use with natural gas, manufactured gas and liquefied petroleum gases (distributed as vapour with or without the admixture of air), or mixtures thereof.Note: Valves covered by this Standard may be used on ""digester gas"" (methane produced during sewage treatment) but because of entrained contaminants their use shall be subject to agreement between the manufacturer and the purchaser.Valves covered by this Standard may not be used on ""sour gas"" (gas with entrained hydrogen sulphide) without modification i.e. additional requirements. Manufacturers should be consulted for their recommendation and agreement reached between the manufacturer and purchaser.1.1.4Requirements for valves NPS 1/4 to 8 are specified.1.1.5This Standard covers valves that are suitable for use in the services specified in 1.1.6 over a pressure range of zero to 860 kPa (125 psig) and in addition shall withstand field pressure testing to a maximum permissible pressure of 1290 kPa (187 psig).Note: The obturator must not be moved while the valve is at a pressure exceeding the rated maximum operating pressure.1.1.6All valves covered by this Standard will be limited as to the service temperature and/or special provisions in accordance with the following designations and descriptions in Parts 2 through 6.Part 2-30?C to +65?C (-22?F to + 149?F) Part 3-40?C to +65?C (-40?F to + 149?F) Part 4-60?C to +65?C (-76?F to + 149?F) Part 5-30?C to + 120?C (-22?F to + 248?F) Part 6-30?C to + 180?C (-22?F to + 356?F)1.1.7This Standard contains SI (Metric) equivalents to the yard/pound quantities, the purpose being to allow the Standard to be used in SI (Metric) units. If a value for a measurement as given in this Standard is followed by an equivalent value in other units, the first stated is to be regarded as the requirement. The given equivalent may be approximate. If a value for a mesurement and an equivalent value in other units are both specified as a quotedmarking requirement, the first stated unit, or both shall be provided.