BS EN ISO 7326 standard is for Rubber and plastics hoses with Assessment of ozone
resistance under static conditions.
This ISO 7326 document 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 textile-
reinforced hoses.
