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ISO 9090:1989 Gas tightness of equipment for gas welding and allied processes
standard by International Organization for Standardization, 04/01/1989
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Specifies the maximum external leakage rates which are acceptable for equipment used for welding, cutting and allied processes. Applies to individual components which are used in the gas supply to a blowpipe from the connecting point of the hose (outlet of the cylinder valve or connecting point to a gas supply plant). Does not apply to gas supply plants.