1.1 本规范仅涵盖工厂制造的锻造铝和铝合金焊接配件，而不是现场制造的配件。术语“焊接配件”适用于对焊或承插端零件，例如45°弯头、180°回弯、90°短半径弯头以及按照ASME B16.9和B16.11规定的尺寸标准制造的其他类型。 附注1: 在整个说明书中，术语的使用 合金 在一般意义上包括铝以及铝合金。 1.2 有关本规范中纳入新铝和铝合金的验收标准，请参见 附件A1 . 1.3 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准。1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers only factory-made wrought aluminum and aluminum-alloy welding fittings in contrast to field-made fittings. The term “welding fittings” applies to butt-welding or socket-end parts, such as 45° elbows, 180° return bends, 90° short radius elbows, and other types made to the dimensional standards specified by ASME B16.9 and B16.11. Note 1: Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum-alloy. 1.2 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A1 . 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.