适用于软绝缘套管，主要用于电气设备的绝缘导体和连接器。一些类型的套管也适用于捆绑、识别、环境密封和机械保护。本标准不适用于涂布纸。 符合本规范的材料符合既定的性能水平。然而，用户为特定应用选择材料时，应基于该应用中充分性能所需的实际要求，而不是仅基于本规范。 第二版包括对图纸编号系统进行澄清的附加条款、资格认证要求指南以及尺寸和/或颜色相关测试指南。

Applicable to flexible insulating sleeving primarily for insulating conductors and connectors of electrical apparatus. Some of the types of sleeving are also suitable for binding, identification, environmental sealing and mechanical protection. This standard is not applicable to coated papers. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. This second edition includes additional clauses providing clarification on the sheet numbering system, guidance on qualification approval requirements and a guide to tests that are size and/or colour dependant.