This International Standard specifies two methods for deter-mining the vacuum resistance of hoses, depending on bore diameter, as follows:
method A — For hoses of nominal bore diameter up to and including 80 mm
method B — For hoses of nominal bore diameter greater than 80 mm
SIS SS-ISO 7233:1990 history
1990SIS SS-ISO 7233:1990 Rubber and plastics hoses and hose assemblies — Vacuum resistance — Methods of test