绝缘软管 第3部分：各种类型软管的规范 活页246：双壁不阻燃聚烯烃热收缩软管

[中文适用范围]： 该标准规定了双壁、非阻燃、热收缩聚烯烃套管的要求。该套管已被发现适合在高达 80 ℃ 的温度下使用。套管由半刚性交联材料制成的外层组成。内层是基本上非交联的聚烯烃，其在收缩过程中流动并熔合以提供密封。通常出售的内径最大为 25 毫米，有以下颜色：黑色、白色、红色、黄色、蓝色和半透明。本标准中列出的尺寸或颜色以外的尺寸或颜色可作为定制产品提供。如果这些项目符合表 2、3、4 和 5 中列出的性能要求（不包括尺寸），则应视为符合本标准。符合本规范的材料符合既定的性能水平。然而，用户针对特定应用选择材料应基于该应用中足够性能所需的实际要求，而不是仅基于本规范。 [外文原描述]： Defines requirements for dual wall, not flame retarded, heat shrinkable, polyolefin sleeving. This sleeving has been found suitable for use up to 80 °C. The sleeving consists of an outer layer made of a semi-rigid cross-linked material. The inner layer is a substantially non-cross-linked polyolefin that flows and fuses during the shrinkage process to provide a seal. It is normally offered for sale with an internal diameter up to 25 mm in the following colours: black, white, red, yellow, blue and translucent. Sizes or colours other than those listed in this standard may be available as custom items. These items shall be considered to comply with this standard if they comply with the property requirements listed in tables 2, 3, 4 and 5, excluding dimensions. 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.