1.1本规程允许在环境条件下测量由平面接头组件上的螺栓负载引起的垫圈压缩。 1.2以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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====== 法兰接头中螺栓载荷产生的垫圈压缩在接头组件的应用工程中很重要。它们与垫片的密封能力、保持装配螺栓紧密性的能力以及决定接头组件使用行为的各种其他垫片特性有关。因此，能够确定垫片在螺栓载荷下的压缩程度将允许对接头组件在与应用或服务环境接触时的行为进行定性预测。 通过塞子试验，可以测量螺栓中心之间法兰面的弯曲度；然而，在一些高度扭曲的法兰中，可能无法检测到螺栓中心之间的最大弯曲。 平面接头组件中选定点处垫片压缩的变化揭示了法兰变形的程度或法兰在整个垫片中满意地分配螺栓载荷产生的压缩力的能力。

1.1 This practice permits measurement of gasket compression resulting from bolt loading on a flat-face joint assembly at ambient conditions. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 ====== Gasket compressions produced by bolt loads in a flanged joint are important in the application engineering of a joint assembly. They are related to the ability of a gasket to seal, to maintain tightness on assembly bolts, and to a variety of other gasket properties that determine the service behavior of a joint assembly. Thus, being able to determine the degree of compression in a gasket under the bolt loading will permit one to make qualitative predictions of the behavior of a joint assembly when it comes in contact with the application or service environment. With the plug test, bending of a flange facing between bolt centers can be measured; however, in a few highly distortable flanges the maximum bending between bolt centers may not be detected. The variation in gasket compressions at selected points in a flat-face joint assembly reveals the degree of flange distortion or the ability of the flange to distribute satisfactorily the compressive forces from bolt loads throughout the gasket.