This International Standard specifies three methods for the determination of the volume of gas diffusing through the wall of a rubber or plastics hose in a specified period.
Method 1: For determining the permeability of the complete hose wall, excluding end-fittings, to the test gas. This method is used when evaluat-ing gas permeability characteristics of hoses with pricked covers.
Method 2: For determining the permeability of the hose inner lining and the reinforcement to the test gas. This method is used when deter-mining the permeability characteristics of hoses with an unpricked cover when the gas usually issues from the textile reinforcement at the cut ends.
Method 3: For determining precisely the per-meability of the wall of a hose during a specified period of time to the test gas.
The methods are applicable only to test gases which are insoluble in water.