1.1 本规程涵盖用于船上管道系统的膨胀焊接和银钎焊承插接头。 1.2 膨胀焊接和银钎焊承插接头用于连接两个或两个具有相同NPS的管道（参见 注1 )不使用配件或对接焊缝。 1.3 钎焊承插式接头不适用于存在火灾危险或工作温度超过425°F（205°C）的区域内含有易燃或可燃液体的系统。 1.4 本规程不包括仅取决于角焊缝而非主要取决于管道/管子和套筒之间钎焊材料的钎焊接头。 注1: 在本实施规程中，无量纲指示符标称管道尺寸（NPS）已被诸如“标称直径”、“尺寸”、“标称尺寸”和“铁管尺寸”等传统术语所取代 1.5 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。 1.6 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。 ====意义和用途====== 3.1 膨胀焊接承插接头可用于以下管道: 3.1.1 无缝铜管- 2.375英寸。（60毫米）外径至6.625英寸。（170 mm）外径。 3.1.2 无缝铜镍管- 2.375英寸。（60毫米）外径至6.625英寸。（170 mm）外径。 3.1.3 无缝铜水管- 2.125英寸。（55 mm）外径至4.125英寸。（105 mm）外径。 3.1.4 无缝不锈钢管- 2个NPS到6个NPS，附表5和10。 3.2 膨胀银钎焊承插接头可用于以下管道: 3.2.1 无缝铜管- 2.375英寸。（60毫米）外径至6.625英寸。（170 mm）外径。 3.2.2 无缝铜镍管- 2.375英寸。（60毫米）外径至6.625英寸。（170 mm）外径。 3.2.3 无缝铜水管- 2.125英寸。（55 mm）外径至4.125英寸。（105 mm）外径。 3.3 如果经验或测试表明接头安全且适合设计和操作条件，并且有足够的措施防止接头分离，则可以使用膨胀焊接和银钎焊承插接头。

1.1 This practice covers expanded welded and silver brazed socket joints for use on shipboard piping systems. 1.2 Expanded welded and silver brazed socket joints are to be used to join two pipes or tubes having the same NPS (see Note 1 ) without using a fitting or butt weld. 1.3 Brazed socket type joints are not intended for use on systems containing flammable or combustible fluids in areas where fire hazards exist or where the service temperature exceeds 425°F (205°C). 1.4 Brazed joints depending solely upon a fillet weld rather than primarily upon brazing material between pipe/tube and socket are not covered by this practice. Note 1: The dimensionless designator nominal pipe size (NPS) has been substituted in this practice for such traditional terms as “nominal diameter,” “size,” “nominal size,” and “iron pipe size.” 1.5 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. 1.6 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. ====== Significance And Use ====== 3.1 Expanded welded socket joints may be used with the following pipe and tube: 3.1.1 Seamless Copper Tube— 2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.1.2 Seamless Copper-Nickel Tube— 2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.1.3 Seamless Copper Water Tube— 2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter. 3.1.4 Seamless Stainless Steel Pipe— 2 NPS through 6 NPS, Schedules 5 and 10. 3.2 Expanded silver brazed socket joints may be used with the following tube: 3.2.1 Seamless Copper Tube— 2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.2.2 Seamless Copper-Nickel Tube— 2.375-in. (60-mm) outside diameter through 6.625-in. (170-mm) outside diameter. 3.2.3 Seamless Copper Water Tube— 2.125-in. (55-mm) outside diameter through 4.125-in. (105-mm) outside diameter. 3.3 Expanded welded and silver brazed socket joints may be used where experience or test has demonstrated that the joint is safe and suitable for design and operating conditions, and where adequate provision is made to prevent separation of the joint.