1.1 本规范涵盖无缝和焊接的钛及钛合金管，其至少部分外表面或内表面已通过冷成型增强，以改善传热。这些管道用于表面冷凝器、蒸发器、热交换器、盘管和类似的传热设备，直径不超过1英寸[25.4毫米]。基管壁厚通常平均至少为0.049英寸[12.45毫米]，但可与制造商协商采用较轻的规格。 1.2 根据本规范购买的管道通常会插入管板、挡板或支撑板中的紧密配合孔，这些孔沿管道长度间隔开，如管式换热器制造商协会（TEMA）标准中所定义的。 2. 管端也将膨胀，然后可以进行焊接。管也可以被弯曲以形成U形管，或者被卷绕或以其他方式形成，尽管紧密的半径可能需要弯曲的未增加的长度。 1.3 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完全相等的；因此，每个系统应独立于订单使用。将两个系统的值组合在一起可能会导致不一致。在正文中，国际单位制显示在括号中。英寸磅单位应适用，除非订单中规定了本规范的“M”名称。 1.4 以下预防声明仅适用于试验方法部分: 部分 8. , 9 , 10 ，和本规范的S1: 本标准并不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。 1.5 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 covers seamless and welded titanium and titanium alloy tubing on which at least part of the external or internal surface has been enhanced by cold forming for improved heat transfer. The tubes are used in surface condensers, evaporators, heat exchangers, coils, and similar heat transfer apparatus in diameters up to and including 1 in. [25.4 mm]. The base tube wall thickness is typically at least 0.049 in. [1.245 mm] average, but lighter gauge may be negotiated with the manufacturer. 1.2 Tubing purchased to this specification will typically be inserted through close-fitting holes in tubesheets, baffles, or support plates spaced along the tube length such as defined in the Tubular Exchanger Manufacturer’s Association (TEMA) Standard. 2 The tube ends will also be expanded, and may then be welded. Tube may also be bent to form U-tubes or be coiled or otherwise formed, although tight radii may require unenhanced length for the bends. 1.3 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 order. Combining values from the two systems may result in non-conformance. Within the text, the SI units are shown in brackets. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order. 1.4 The following precautionary statement pertains to the test method portion only: Section 8 , 9 , 10 , and S1 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. 1.5 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.