前言:这是CSA 3.16第四版，杠杆操作的非润滑插塞式气体切断阀。它取代了2015年、1988年和1985年出版的之前版本。本版本的主要变化包括:a）增加了替代生产测试；和b）更新了整个标准的格式。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。经营范围:1。 1本标准适用于尺寸为NPS 1/4至8的手动杠杆式气体切断阀，其金属结构具有焊接、法兰和螺纹端，但用于天然气、工业气体和液化石油气的压力润滑设计除外。注:1）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。2） 未经修改，本标准涵盖的阀门不得用于“酸性气体”（含有硫化氢的气体）。 应咨询制造商的建议。1.2根据第5条至第9条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。a） 第5条:–30至65摄氏度（–22至149华氏度）；b） 第6条:–40至65摄氏度（–40至149华氏度）；c） 第7条:–60至65摄氏度（–76至149华氏度）；d） 第8条:–30至120°C（–22至248°F）；ande）第9条:–30至180°C（–22至356°F）。1.3本标准适用于最大工作压力在0至860 kPa（125 psig）范围内，且能够承受1290 kPa（187 psig）最大允许压力的现场压力试验的手动杠杆式气体切断阀。 1.4除非另有规定，否则本标准中提及的所有psi（kPa）均视为表压。1.5在本标准中，“应”用于表示要求，即用户为遵守本标准而应满足的规定；“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。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。1.6国际单位制给出的数值为本标准中的记录单位。括号中给出的值仅供参考和比较。

Preface:This is the fourth edition of CSA 3.16,Lever operated non-lubricated plug type gas shut-off valves. It supersedes the previous editions published in 2015, 1988, and 1985.The major changes to this edition include the following:a) an alternative manufacturing production test has been added; andb) updated formatting throughout the Standard.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.Scope:1.1This Standard applies to manual lever operated, gas shut-off valves sizes NPS 1/4 to 8 of metallic construction with weld and flanged and threaded ends other than pressure lubricated designs for use with natural gas, manufactured gas, and liquefied petroleum gases.Notes:1)Valves covered by this Standard may be used on "digester gas" (methane produced during sewage treatment) but because of entrained contaminants their use is subject to agreement between the manufacturer and the purchaser.2)Valves covered by this Standard may not be used on "sour gas" (gas with entrained hydrogen sulphide) without modification(s). Manufacturers should be consulted for their recommendation.1.2All 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 Clauses 5 to 9.a) Clause 5: –30 to 65 °C (–22 to 149 °F);b) Clause 6: –40 to 65 °C (–40 to 149 °F);c) Clause 7: –60 to 65 °C (–76 to 149 °F);d) Clause 8: –30 to 120 °C (–22 to 248 °F); ande) Clause 9: –30 to 180 °C (–22 to 356 °F).1.3This Standard applies to manual lever operated gas shut-off valves having maximum operating pressure over a range of 0 to 860 kPa (125 psig) and able to withstand field pressure testing to a maximum permissible pressure of 1290 kPa (187 psig).1.4All references to psi (kPa) throughout this Standard are considered as gauge pressure unless otherwise specified.1.5In this Standard, "shall" is used to express a requirement, i.e., a provision that the user shall 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 designated normative (mandatory) or informative (non-mandatory) to define their application.1.6The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.