SIS SS-ISO 7326-1990 橡胶和塑料软管．静态条件下零电阻评估

标准号：SIS SS-ISO 7326-1990
中文标准名称：橡胶和塑料软管．静态条件下零电阻评估
英文标准名称：Rubber and plastics hoses — Assessment of ozone resistance under static conditions
发布日期：1990/12/5 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This International Standard specifies three methods for deter-mining the resistance of the outer covers of hoses to ozone: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.Methods 1 or 2 should normally be used. Method 3 should be used only if it is not possible to carry out the test in accordance with method 2.NOTE — For hoses with built-in fittings from which it is not possible to take test pieces, the ozone resistance may be assessed on slabs in accordance with ISO 1431/1, using test sheets of the appropriate polymeric compound vulcanized to the same degree.