BS EN ISO 7326:2016规定了五种测定软管外罩耐臭氧性的方法:方法1，对于直径小于等于25mm的软管，在软管本身上进行；方法2，对于大于25mm的孔径，在软管壁上的试件上进行；方法3，对于大于25mm的孔径，在盖上的试件上进行；方法4，对于所有孔径，在软管本身上进行；方法5，适用于所有孔径，在可膨胀的软管上进行，例如: 水管。注:对于带有内置配件的软管，如果无法从其上取下试样，则耐臭氧性 可根据ISO 1431-1，使用适当聚合物化合物的测试片在平板上进行评估 硫化到同样的程度。交叉引用:ISO 1431-1:2012ISO 23529ISO 8330购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN ISO 7326:2016 specifies five methods for determining the ozone resistance of the outer covers of hoses:method 1, for bore sizes up to and including 25 mm, carried out on the hose itself;method 2, for bore sizes greater than 25 mm, carried out on a test piece from the hose wall;method 3, for bore sizes greater than 25 mm, carried out on a test piece from the cover;method 4, for all bore sizes, carried out on the hose itself;method 5, for all bore sizes, carried out on hoses that are expandable, for example textilereinforced hoses.NOTE For hoses with built-in fittings from which it is not possible to take test pieces, the ozone resistance can be assessed on slabs in accordance with ISO 1431-1, using test sheets of the appropriate polymeric compound vulcanized to the same degree.Cross References:ISO 1431-1:2012ISO 23529ISO 8330All current amendments available at time of purchase are included with the purchase of this document.