Historical
BS EN 562:2003
Gas welding equipment. Pressure gauges used in welding, cutting and allied processes (British Standard)
This European Standard specifies requirements for Bourdon-tube pressure gauges normally used with compressed gases at pressures up to 300 bar in welding, cutting and allied processes. It also covers use for dissolved acetylene and for liquefied gases under pressure. It does not cover gauges for acetylene in acetylene manufacturing plants.
British Standards Institution [bsi]