1.1 本规范描述了焊接奥氏体、铁素体和双相不锈钢管，其外表面和内表面已通过冷成型工艺进行了改性，以产生间歇性波纹，从而提高了可成形性和抗地震及其他环境变形的能力。这些管道用于饮用水服务管线和其他液体输送系统，公称直径为 1. / 2. 至2英寸[13至50毫米]。 1.2 根据本规范提供的管道尺寸和厚度通常为0.625至2.125英寸[15.88至48.60毫米]，外径和0.028至0.049英寸[0.8至1.2毫米]，包括壁厚。 1.3 本规范中包括的奥氏体、铁素体和双相不锈钢的等级应符合管理直管规范中列出的材料 268澳元/268澳元 , 269/A269米 或 A789/A789米 。选择将取决于设计和服务要求。 1.4 以国际单位制或英寸磅单位表示的数值应单独视为标准。每个系统中规定的值可能不是精确的等效值；因此，每个系统应独立于其他系统使用。将两个系统的值组合在一起可能会导致不符合标准。 1.5 本规范以英寸磅和国际单位制表示。但是，除非订单规定了适用的“M”规格名称（国际单位制），否则材料应以英寸磅单位提供。 1.6 以下安全隐患说明仅适用于本规范的测试方法。 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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 describes welded austenitic, ferritic, and duplex stainless steel tube on which the external and internal surface has been modified by a cold forming process to produce an intermittent corrugation for improved formability and resistance to seismic and other environmental distortions. The tubes are used for potable water service lines and other liquid delivery systems in nominal diameters from 1 / 2 to 2 in. [13 to 50 mm]. 1.2 The tube sizes and thicknesses usually furnished to this specification are 0.625 to 2.125 in. [15.88 to 48.60 mm], outside diameter and 0.028 to 0.049 in. [0.8 to 1.2 mm], inclusive, in wall thickness. 1.3 The grades of austenitic, ferritic, and duplex stainless steels included in this specification shall conform to materials listed in the governing straight tube Specifications A268/A268M , A269/A269M , or A789/A789M . Selection will depend upon design and service requirements. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 This specification is expressed in both inch-pound and SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished in inch-pound units. 1.6 The following safety hazards statement pertains only to the test methods 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. 1.7 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.