1.1 该分类涵盖了指定或描述商用层压复合垫片材料（LCGM）相关性能的方法。这些结构由两层或多层化学性质不同的材料组成。这些材料可以是有机或无机的，或与各种粘合剂或浸渍剂的组合。垫片涂层不包括在内，因为其细节将在工程图纸上给出，或作为单独的规范给出。指定为封装垫片的商业材料不在此分类范围内；它们包含在实践中 F336 该分类系统不包括目前用于某些汽车排气和气缸盖垫片的多层钢（MLS）垫片。MLS垫片按分类进行分类 F2325 . 1.2 由于没有包括对垫片性能有贡献的所有特性，因此将这种分类用作选择LCGM的基础是有限的。 1.3 以国际单位制表示的值应被视为标准。括号中给出的值仅供参考。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 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。 =====意义和用途====== 4.1 这种分类旨在鼓励报告属性的统一性；为生产者和用户之间的交流提供共同语言；指导工程师和设计师使用、建造和性能商用材料；并且在引入新材料和测试方法时具有足够的通用性。

1.1 This classification covers 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 . This classification system does not cover multilayer steel (MLS) gaskets currently used for some automotive exhaust and head gaskets. MLS gaskets are classified under Classification F2325 . 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 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. ====== Significance And Use ====== 4.1 This classification is intended to encourage uniformity in reporting properties; to provide a common language for communications between producers and users; to guide engineers and designers in the use, construction, and properties of commercially available materials; and to be versatile enough to cover new materials and test methods as they are introduced.