BS EN ISO 2503:2009+A1:2015

This standard BS EN ISO 2503:2009+A1:2015 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) is classified in these ICS categories:

• 25.160.30 Welding equipment
• 23.060.40 Pressure regulators

This International Standard 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 ¹⁾ (30 MPa),

• dissolved acetylene,

• liquefied petroleum gases (LPG),

• methylacetylene-propadiene mixtures (MPS), and

• carbon dioxide (CO ₂),

for use in welding, cutting and allied processes. It does not cover pressure regulators having a nominal outlet pressure p ₂ > 20 bar.

This International Standard also specifies requirements for single or two-stage pressure regulators with flow-metering devices for connection to gas cylinders used for

• compressed gases or mixtures up to 300 bar (30 MPa), and

• carbon dioxide (CO ₂),

for 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. Annex B gives examples of flow-control systems and their flow-measuring devices.

This International 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 for oxygen regulators.