ISO 2503 Gas welding equipment - Pressure regulators and pressure regulators with flow-metering devices for gas cylinders used in welding, cutting and allied processes up to 300 bar (30 MPa); Amendment 1*, 2015-04-01 Update
DIN EN 60974-6:2011 history
2011DIN EN 60974-6:2011 Arc welding equipment - Part 6: Limited duty equipment (IEC 60974-6:2010); German version EN 60974-6:2011