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ISO 4144:2003
Pipework - Stainless steel fittings threaded in accordance with ISO 7-1
ISO 4144:2003 specifies the types, pressure-temperature ratings, minimum dimensions and materials of stainless steel fittings for threaded connections in accordance with ISO 7-1, used for ordinary piping for steam, air, gas, water, oil, etc.
International Organization for Standardization [iso]