1.1 本规范涵盖管道系统和储罐喷嘴中使用的圆形接触模制玻璃纤维增强热固性树脂法兰。包括对材料、工艺、性能和尺寸的要求。 1.2 法兰（参见 图1 )可生产为一体式法兰，类型A，或管上法兰，类型B。 图1 法兰类型 1.3 本规范基于法兰性能，不包括设计。 1.4 这些法兰设计用于按照规范制造的管道和储罐 1996年2月 , 1997年2月 , 第362页 , 第3929页 , 第3517页 , 第3574页 和 D4097 . 1.5 本规范未涵盖垫片的选择，请参阅制造商的建议。 1.6 以英寸磅为单位的数值应视为标准。括号中给出的国际单位制仅供参考。 1.7 以下注意事项仅适用于第节测试方法部分 9 ，本规范的: 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。 注1: 目前还没有与该标准等效的ISO。 1.8 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 circular contact-molded fiberglass reinforced-thermosetting-resin flanges for use in pipe systems and tank nozzles. Included are requirements for materials, workmanship, performance, and dimensions. 1.2 Flanges (see Fig. 1 ) may be produced as integral flanges, Type A, or flange-on-pipe, Type B. FIG. 1 Flange Types 1.3 This specification is based on flange performance and does not cover design. 1.4 These flanges are designed for use with pipe and tanks that are manufactured to Specifications D2996 , D2997 , D3262 , D3299 , D3517 , D3754 , and D4097 . 1.5 Selection of gaskets is not covered in this specification, refer to the manufacturer's recommendation. 1.6 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only. 1.7 The following precautionary caveat pertains only to the test methods portion, Section 9 , 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. Note 1: There is no known ISO equivalent to this standard. 1.8 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.