What is this standard about?
This is about the pressure regulators used with gas welding equipment. It specifies requirements for single or two-stage pressure regulators, without and with flow-metering devices, for connection to gas cylinders and use in welding, cutting and allied processes.
Typical processes using this equipment are: tungsten inert-gas arc welding (TIG), metal-arc inert-gas welding (MIG), metal-arc active gas welding (MAG), plasma arc welding, tubular-cored-wiretubular-cored-wire welding and plasma cutting.
Who is this standard for?
This standard is relevant to anyone using pressure regulated gas welding equipment as well as those who manufacture or purchase pressure regulators for use with gas welding equipment in any sector.
Why should you use this standard?
It specifies requirements for single or two-stage pressure regulators without flow-metering devices for connection to gas cylinders used for:
- Compressed gases up to 300 bar (30 MPa)
- Dissolved acetylene
- Liquefied petroleum gases (LPG)
- Methylacetylene-propadiene mixtures (MPS) Carbon dioxide (CO2)
It also specifies requirements for single or two-stage pressure regulators with flow-metering devices for connection to gas cylinders used for:
- Compressed gases up to 300 bar (30 MPa)
- Carbon dioxide (CO2)
NOTE: This standard does not cover pressure regulators intended for direct use on cylinder bundles. Such regulators comply with the safety requirements of ISO 7291, in particular with the adiabatic compression test of oxygen regulators.
What’s changed since the last update?
This first amendment to BS EN ISO 2503 supersedes the 2009 version of the standard. The amendment affects:
- Normative references
- Clause 7.1 on Pressure regulators without flow-metering devices