柔性绝缘套管 - 第3部分:各种类型套管的规格 - 第216页:热收缩 阻燃 有限的防火套管

[中文适用范围]： 本部分规定了四种类型的阻燃、有限火灾危险的热缩套管的要求，耐热等级为105°C，如下所示。 A类：薄壁，收缩比2:1，内径最大102.0 mm B类：中等壁厚，收缩比2:1，内径最大60.0 mm C类：厚壁，收缩比2:1，内径最大51.0 mm D类：中等壁厚，收缩比3:1，内径最大40.0 mm 这些套管通常提供以下颜色：黑色、红色、绿色、蓝色、白色、黄色和绿/黄色。 本文件中未列出的尺寸或颜色可作为定制项目提供。如果这些项目符合表5、6、7和8中列出的性能要求（不包括尺寸和质量），则视为符合本文件。 符合本规范的材料满足既定的性能水平。然而，用户为特定应用选择材料时，应基于该应用中足够性能的实际需求，而不仅仅基于本规范。 [外文原描述]： IEC 60684-3-216: 2019 gives the requirements for four types of heat-shrinkable, flame-retarded, limited-fire-hazard sleeving with a thermal endurance rating of 105 °C as shown below. Class A: thin wall shrink ratio 2:1 internal diameter up to 102,0 mm Class B: medium wall shrink ratio 2:1 internal diameter up to 60,0 mm Class C: thick wall shrink ratio 2:1 internal diameter up to 51,0 mm Class D: medium wall shrink ratio 3:1 internal diameter up to 40,0 mm These sleevings are normally supplied in the following colours: black, red, green, blue, white, yellow and green/yellow. Sizes or colours other than those listed in this document are available as custom items. These items are considered to comply with this document if they comply with the property requirements listed in Tables 5, 6, 7 and 8, excluding dimensions and mass. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application will be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. This second edition cancels and replaces the first edition published in 2001, Amendment 1:2005 and Amendment 2:2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: 1. the temperature at which the sleeving is shrunk in a forced-air circulation oven for (5 ± 1) min has been increased from (150 ± 5) °C to (200 ± 5) °C. Keywords: flexible insulating sleeving for electrical purposes