1.1本分类提供了一种指定或描述商用层压板复合垫片材料（LCGM）相关性能的方法。这些结构由两层或两层以上化学性质不同的材料组成。这些材料可以是有机或无机材料，也可以是与各种粘合剂或浸渍剂的组合。垫圈涂层不包括在内，因为其细节将在工程图纸上给出，或作为单独的规范。指定为密封垫的商业材料不包括在本分类中； 实践F336对其进行了介绍。 1.2由于不包括所有有助于垫片性能的特性，因此将该分类作为选择LCGM的基础是有限的。 1.3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。 1.4本标准无意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。

1.1 This classification provides a means for specifying or describing pertinent properties of commercial laminate composite gasket materials (LCGM). These structures are composed of two or more chemically different layers of material. These materials may be organic or inorganic, or combinations with various binders or impregnants. Gasket coatings are not covered since details thereof are intended to be given on engineering drawings, or as separate specifications. Commercial materials designated as enveloped gaskets are excluded from this classification; they are covered in Practice F336. 1.2 Since all of the properties that contribute to gasket performance are not included, use of this classification as a basis for selecting LCGM is limited. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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.