1.1 本规范涵盖焊接UNS N06600， 2. N06601、N06603、N06025、N06045、UNS N06690、UNS NO6693和UNS N0699合金锅炉、热交换器和冷凝器管，用于一般耐腐蚀和低温或高温环境。 1.2 本规范涵盖管子 1. / 8. 英寸至5英寸（3.18 mm至127 mm），包括在内，外径和0.015 英寸至0.500英寸（0.38 mm至12.70 mm），包括在内，壁厚。桌子 规范第2页 B751 列出了这些尺寸的尺寸要求。可提供具有其他尺寸的管道，前提是此类管道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。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 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熟悉所有危险，包括制造商提供的本产品/材料的适当安全数据表（SDS）中确定的危险，制定适当的安全、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 welded UNS N06600, 2 N06601, N06603, N06025, N06045, UNS N06690, UNS N06693, and UNS N06699 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 in. to 5 in. (3.18 mm to 127 mm), inclusive, in outside diameter and 0.015 in. to 0.500 in. (0.38 mm 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 Safety Data Sheet (SDS) 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.