1.1 本规范规定了适用于医用气体系统的经特殊清洗的直管段无缝铜管的两种壁厚表的要求，这些无缝铜管被识别为K型和L型。管道的安装应符合美国国家消防协会（NFPA）标准的要求 99、气体和真空系统（NFPA）标准99C、减压设施标准（NFPA）标准99B和加拿大标准协会（CSA）标准Z 305.1/Z 7396.1，不可燃医用气体管道系统。 注1: 规范中定义了K型和L型管 B88 . 注2: 拉制回火管适合与毛细管（焊点）配件一起用于钎焊。 1.2 以英寸表示的值- 磅单位应视为标准单位。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 以下安全危险警告仅适用于第节的试验方法部分 12 符合本规范的要求。 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 2. 1.4 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 17.1 为了确定是否符合表1所列特性要求的规定限值 表9 ，观察值或计算值应按惯例四舍五入 E29年 .

1.1 This specification establishes the requirements for two wall thickness schedules of specially cleaned, straight lengths of seamless copper tube, identified as Types K and L, suitable for medical gas systems. The tube shall be installed in conformance with the requirements of the National Fire Protection Association (NFPA) Standard 99, Gas and Vacuum Systems (NFPA) Standard 99C, Standard for Hypobaric Facilities (NFPA) Standard 99B, and Canadian Standards Association (CSA) Standard Z 305.1/Z 7396.1, Nonflammable Medical Gas Piping Systems. Note 1: Types K and L tube are defined in Specification B88 . Note 2: Drawn temper tube is suitable for use with capillary (solder joint) fittings for brazing. 1.2 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. 1.3 The following safety hazard caveat pertains only to the test method portion of Section 12 of this specification. 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. 2 1.4 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. ====== Significance And Use ====== 17.1 For purpose of determining compliance with the specified limits for requirements of the properties listed in Table 9 , an observed value or calculated value shall be rounded as indicated in accordance with the rounding of Practice E29 .