前言:这是CSA 2.29《燃气手持式火炬》的第二版。它取代了1997年出版的前一版。本版本的主要变化包括:a）去除硝酸亚汞浸泡试验；b） 增加盐雾和氨蒸气试验；andc）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。 范围:1.1本标准适用于新生产的用于丙烷、丁烷、天然气和MPS（甲基乙炔-丙二烯稳定）的火炬。本标准适用于吸入大气进行燃烧的火炬。1.2本标准适用于工业用途的手持式手电筒，如钎焊、钎焊、焊接预热、热处理，以及一般用途，如烧草、去除油漆和根除杂草和昆虫。1.3这些要求涵盖的力旨在a）用于直接连接（toi）规范TC- 符合CAN/CGSB-43.123和《危险品运输条例》要求的2P和TC-2Q不可再充装集装箱；（i）符合CSA B339和《危险货物运输条例》要求的规范TC-39不可再充装集装箱；b） 直接连接到符合CSA B339和《危险品运输条例》要求的可再填充容器；c） 包括一个符合a）或b）项要求的整体式、可再充装或不可再充装气瓶； ord）用于连接燃气供应的软管，带或不带调节器。注:如果火炬满足本标准的要求，则没有最大或最小点火率，并且除第4.7.1条所述外，燃料容器没有容量限制。1.4本标准涵盖的力应按照CSA B149的a）适用规定使用。1.b） 有管辖权的当局的要求；（orc）CSA B149的适用条款。1.有管辖权的当局的要求。 1.5本标准适用于完全由新的、未使用的零件和材料制成的火炬。1.6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。1.7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 second edition of CSA 2.29,Hand-held torches for fuel gas. It supersedes the previous edition published in 1997.The major changes to this edition include the following:a) removal of the mercurous nitrate immersion test;b) addition of the salt spray and ammonia vapour test; andc) 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 newly-produced torches for use with propane, butane, natural gas, and MPS (methyl acetylene-propadiene stabilized). This Standard applies to torches that aspirate atmospheric air for combustion.1.2This Standard applies to hand-held torches intended for industrial applications such as brazing, soldering, pre-heating for welding, heat treatment, and general applications such as grass burning, paint removal, and the eradication of weeds and insects.1.3Torches covered by these requirements are intendeda) for direct connection toi) specification TC-2P and TC-2Q non-refillable containers, meeting the requirements of CAN/CGSB-43.123, and the Transportation of Dangerous Goods Regulations; orii) specification TC-39 non-refillable containers, meeting the requirements of CSA B339, and the Transportation of Dangerous Goods Regulations;b) for direct connection to refillable containers meeting the requirements of CSA B339 and the Transportation of Dangerous Goods Regulations;c) to incorporate an integral, refillable, or non-refillable cylinder that meets the requirements of Items a) or b); ord) for hose connection to the fuel gas supply, with or without a regulator.Note:Provided that a torch meets the requirements of this Standard, there is no maximum or minimum rate of firing and except as noted in Clause 4.7.1, there is no capacity limitation on the fuel container.1.4Torches covered by this Standard are intended to be used in accordance with thea) applicable provisions of CSA B149.1;b) requirements of the authority having jurisdiction; orc) applicable provisions of CSA B149.1 and requirements of the authority having jurisdiction.1.5This Standard applies to torches constructed entirely of new, unused parts and materials.1.6In 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 designated normative (mandatory) or informative (non-mandatory) to define their application.1.7The 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.