EN ISO 7233:2016

European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test pieces
7 Conditioning of test pieces
8 Test pressure
9 Procedure (method A)
10 Procedure (method B)
11 Procedure (method C)
12 Test report
Bibliography

ISO 7233:2016 specifies three methods for determining the resistance to vacuum of hoses and hose assemblies manufactured from plastic or rubber. Applicable dimensions of hoses for each method are as follows:- method A for hoses of nominal bore up to and including 80 mm;- method B for hoses of nominal bore greater than 80 mm;- method C for hoses of all dimensions.Methods A and B can also be used to check the adhesion of the lining to the reinforcement (delamination) in a length of hard-wall hose or hose assembly.