BS EN ISO 7326:2016

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General considerations
5 Apparatus
6 Test pieces
7 Conditioning of test pieces
8 Test conditions
9 Procedure
10 Test report
Bibliography

Defines 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.

This document specifies five methods for determining the ozone resistance of the outer covers of hoses: method 1, for bore sizes up to and including 25mm, carried out on the hose itself; method 2, for bore sizes greater than 25mm, carried out on a test piece from the hose wall; method 3, for bore sizes greater than 25mm, 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. 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 ISO1431‑1 , using test sheets of the appropriate polymeric compound vulcanized to the same degree.