DIN 3230-5
DIN 3230-5
Technical conditions of delivery of valves - Valves for gas installations and gas pipelines - Part 5: Requirements and testsstandard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2014
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2014