1.1本试验方法包括评估与耐腐蚀工艺设备一起使用的密封垫圈的密封性能。包封垫片是指在通常暴露于腐蚀环境的内部区域具有一些耐腐蚀覆盖层的垫片。屏蔽材料可以是塑料（例如聚四氟乙烯）或金属（例如钽）。通常在信封内使用弹性顺应填料。实践F 336涵盖了非金属垫片的设计和施工。 1.2以国际单位制表示的数值应视为标准。 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。 有关具体的预防说明，请参阅第节。

1.1 This test method covers the evaluation of the sealing properties of enveloped gaskets for use with corrosion-resistant process equipment. Enveloped gaskets are described as gaskets having some corrosion-resistant covering over the internal area normally exposed to the corrosive environment. The shield material may be plastic (such as polytetrafluoroethylene) or metal (such as tantalum). A resilient conformable filler is usually used inside the envelope. The design and construction of nonmetallic gaskets is covered in Practice F 336. 1.2 The values stated in SI units are to be regarded as the standard. 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. For specific precautionary statements, see Section.