绝缘软管.第3部分:各种型号软管规范.活页228:阻燃、耐流体、收缩比2:1的热收缩、半硬质聚偏二氟乙烯软管

[中文适用范围]： 给出了一种热收缩、阻燃、标称收缩比为 2:1、耐流体聚偏二氟乙烯套管的要求，适用温度高达 175 C。这种套管通常提供的内径可达 [外文原描述]： Gives the requirements for one type of heat-shrinkable, flame retarded, with a nominal shrink ratio 2:1, fluid resistant polyvinylidene fluoride sleeving for use at temperatures up to 175 C. This sleeving is normally supplied with an internal diameter up to 25,4 mm, and the standard colour is transparent. Sizes or colours other than those specifically listed in this standard may be available as custom items. These items are considered to comply with this standard if they comply with the property requirements listed in Tables 2, 3, 4 and 5, with the exception of 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 should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. This edition includes the following significant technical change with regard to the previous edition: Replacement of the thermal endurance test method according to IEC 60216 with a long term ageing test, i.e. 3 000 h at the recommended maximum temperature found suitable for use,in order to provide safe thermal test data within a workable time scale.