scope:

This Standard specifies three methods for determining 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 greather than 25 mm carried out on a test piece from the cover. Method 1 or 2 shall normally be used. Method 3 shall be used only if it is not possible to carry out the test in accordance with method 2.