1.1 本规范涵盖用于锅炉、热交换器、冷凝器和类似传热设备的平均或最小壁厚电阻焊接（ERW）管。 1.2 通常根据规范提供的管道尺寸和厚度为0.375英寸。[9.5 mm]内径（ID）至1.5 in。[38 mm]外径（OD）和0.020至0.079英寸。[0.5至2 mm]，包括在内，壁厚。可提供其他尺寸的管子，前提是此类管子符合本规范的所有其他要求。 1.3 钢材应具有 (1) 外管表面， (2) 管内表面，或 (3) 内外管表面均经过纹理处理，以改善传热或流体流动或两者兼而有之。在焊接之前，通过在基带材料的表面上冷成型指定配置来产生纹理表面。 1.4 提供了可选的补充要求，如需要，应在采购订单上说明。 1.5 单位- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。除非订单中规定了产品规范的“M”名称（SI），否则英寸-磅单位应适用。 1.6 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。 1.7 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。

1.1 This specification covers average or minimum wall thickness electric resistance welded (ERW) tubing to be used for boilers, heat exchangers, condensers, and similar heat-transfer apparatus. 1.2 The tubing sizes and thicknesses usually furnished to the specification are 0.375 in. [9.5 mm] inside diameter (ID) to 1.5 in. [38 mm] outside diameter (OD) and 0.020 to 0.079 in. [0.5 to 2 mm], inclusive, in wall thickness. Tubing having other dimensions may be furnished provided such tubes comply with all other requirements of this specification. 1.3 The steel materials shall have the (1) external tube surface, (2) internal tube surface, or (3) both internal and external tube surfaces textured to improve heat transfer or fluid flow or both. Textured surface(s) are produced by cold forming a specified configuration on the surface(s) of base strip material before welding. 1.4 Optional supplementary requirements are provided and, when desired, shall be so stated on the purchase order. 1.5 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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 nonconformance with the standard. The inch-pound units shall apply unless the “M” designation (SI) of the product specification is specified in the order. 1.6 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.