1.1 本规范涵盖焊接UNS N08120、UNS N08800、UNS N08810和UNS N08811 2. 一般耐腐蚀和低温或高温应用的合金锅炉、热交换器和冷凝器管。 1.2 本规范涵盖管道 1. / 8. 至5英寸。（3.18至127） mm），包括外径和0.015至0.500英寸。（0.38至12.70 mm），包括壁厚。桌子 规范第2条 B751 列出了这些尺寸的尺寸要求。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 以英寸-磅为单位的数值应视为标准值。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。 1.4 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熟悉所有危险，包括制造商提供的本产品/材料的适当材料安全数据表（MSDS）中确定的危险，建立适当的安全、健康和环境实践，并在使用前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（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 welded UNS N08120, UNS N08800, UNS N08810 and UNS N08811 2 alloy boiler, heat exchanger, and condenser tubes for general corrosion resisting and low or high-temperature service. 1.2 This specification covers tubes 1 / 8 to 5 in. (3.18 to 127 mm), inclusive, in outside diameter and 0.015 to 0.500 in. (0.38 to 12.70 mm), inclusive, in wall thickness. Table 2 of Specification B751 lists the dimensional requirements of these sizes. Tubes having other dimensions may be furnished provided such tubing complies with all other requirements of this specification. 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, 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.