本文件规定了测定塑料或橡胶软管和软管组件耐真空性的三种方法。每种方法的软管适用尺寸如下: -标称尺寸小于等于80的软管的方法A； -标称尺寸大于80的软管的方法B； -方法C适用于所有尺寸的软管。 如果产品标准中没有其他规定，方法C可以用作方法A和B的替代方法。 方法A和B也可用于检查衬里与加固物之间的粘附力（分层）- 壁软管或软管组件。

This document specifies three methods for determining the resistance to vacuum of hoses and hose assemblies manufactured from plastic or rubber. Applicable dimensions of hoses for each method are as follows: —    method A for hoses of nominal size up to and including 80; —    method B for hoses of nominal size greater than 80; —    method C for hoses of all dimensions. If not otherwise specified in the product standard, method C can be used as an alternative to methods A and B. Methods A and B can also be used to check the adhesion of the lining to the reinforcement (delamination) in a length of hard-wall hose or hose assembly.