BS EN ISO 2503-2009 气体焊接设备.在压力为300巴(30兆帕)以下条件下在焊接,切割和相关工艺中用于气体钢瓶中的压力调节器和带有流量计量设备的压力调节器
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)