What is ISO 5171-Gas welding equipment about?
ISO 5171 is an International Standard that discusses gas welding equipment.
ISO 5171 specifies requirements for Bourdon-tube pressure gauges normally used with compressed gas systems at pressures up to 30 MPa (300 bar) in welding, cutting, and allied processes. ISO 5171 also covers use for dissolved acetylene and for liquefied gases under pressure.
The main objective of ISO 5171 is to provide best industry practices for measurement of force, weight and pressure that contribute to optimal performance of compressed gas systems.
Note: ISO 5171 does not cover gauges for acetylene in acetylene-manufacturing plants.
Who is ISO 5171-Gas welding equipment for?
ISO 5171 on gas welding equipment is relevant to:
- Gas welding equipment manufacturers
- Construction, automotive, mechanical industry
- Manufacturers of pressure vessels
- Aerospace and shipbuilding industry
- Welders and fabricators
- Specifiers
Why should you use ISO 5171-Gas welding equipment?
In gas welding equipment, both oxygen and fuel gases are filled into the cylinder at high pressure. Because these gases cannot be used for welding at such high pressures, a pressure gauge is placed between the flow to monitor the applied gas pressure.
ISO 5171 walks you through best industry manufacturing requirements for materials, design and dimensions of gas welding equipment. It also provides guidance and reference standards for tests applied to sample gauges submitted to check compliance with ISO 5171. The tests include:
- Torsion test
- Bend test
- Case vent test
- Overpressure and leakage test
- Flammability test
Adhering to ISO 5171 recommendations provide you with the accurate measurements of force, weight and pressure that can determine quality and reliability of Bourdon-tube pressure gauges, for optimal performance of compressed gas systems.
What’s changed since the last update?
BS EN ISO 5171:2019 supersedes BS EN ISO 5171:2010, which is withdrawn. BS EN ISO 5171:2019 includes some technical changes with respect to BS EN ISO 5171:2010. These include:
- Clause 7 has been revised and Clause 8 has been clarified regarding the amount of test samples to be used
- Editorial changes have been made
- Test B has been added in 5.2.1.2.3 for supplementary leakage rate under the testing conditions of 8.7.2
