1.1本规程提供了一种比较F 104类各种非金属平垫圈材料的方法 ，在受控条件下的饱和蒸汽服务中。虽然本规程主要针对平垫圈设计，但经修改后，也可适用于各种形式的就地垫圈材料。本规程可用于生产商和用户之间约定的质量控制或材料比较目的。本规程与流体密封协会试验方法FSA-NMG-204-02中使用的夹具和程序一致。 1.2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。 1.3 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本规程可用于评估分类F 104 使用饱和蒸汽和标准ASME RF（凸面）法兰的垫片材料。本规程旨在用作质量控制或材料比较工具，不应用于预测性能。

1.1 This practice provides a means of comparing various nonmetallic flat gasket materials, Classification F 104 , in saturated steam service under controlled conditions. While the practice is designed primarily for flat gaskets, it also can be applied to various form-in-place gasket materials upon modification. The practice may be used for quality control or material comparison purposes as agreed upon between producer and user. This practice is consistent with Fluid Sealing Association test method, FSA-NMG-204-02, with regard to fixtures used and procedure. 1.2 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. 1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== This practice may be used to evaluate Classification F 104 gasket materials using saturated steam and standard ASME RF (raised face) flanges. This practice is intended for use as quality control or material comparison tool and should not be used to predict performance.