ÖNORM EN ISO 4080

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 evaluating 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 determining the permeability characteristics of hoses with an unpricked cover when the gas usually issues from the textile reinforcement at the tut ends. Method 3: For determining precisely the permeability 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.