BS EN ISO 9090:2019

What is ISO 9090- Gas tightness of equipment for gas welding about? 

ISO 9090 is an International Standard that discusses equipment for gas welding, cutting and allied processes.  

ISO 9090 specifies the maximum external gas leakage rates which are acceptable for equipment used for welding, cutting, and allied processes and provides the procedures of measurement. Compliance with ISO 9090 can help you achieve a good weld for optimal performance of the end-application.   

ISO 9090 is applicable to individual components which are used in the gas supply to a blowpipe from the connecting point of the hose (outlet of the cylinder valve or connecting point to a gas supply plant).  

Note: ISO 9090 does not apply to gas supply plants. 

Note: Specific requirements on the test method and conditions/procedure for measurement of the maximum external leakages can be given in individual standards, e.g. ISO 9012 for air-aspirated hand blowpipes. Concerning the method and the conditions to be applied, the individual standard takes precedence over this document. The maximum external leakages according to this document apply. 

Who is ISO 9090- Gas tightness of equipment for gas welding for? 

ISO 9090 on gas tightness of equipment for gas welding is relevant to: 

• Manufacturers of gas tightening equipment 
• Product design engineers 
• Construction, automotive, manufacturing industry 
• Sheet metal manufacturers 
• Aerospace engineering  
• Shipbuilding industry 
• Oil and gas industry 
• Welders and fabricators 

Why should you use ISO 9090- Gas tightness of equipment for gas welding ? 

Because inflammable gases are used extensively and human lives are directly exposed to gas welding procedures, safety is of the utmost importance in gas welding and related processes. 

ISO 9090 helps establish the maximum permissible external gas leakage rates acceptable for equipment and walks you through best industry practice for its measurement. The maximum permissible external gas leakage rates, which are specified in ISO 9090, are total leakage rates for a complete component including inlet connections. 

With ISO 9090-compliant leakage rates, you can accurately and efficiently determine defects and minimize hazards, enhancing safety measures for gas welding and allied processes. If you are a manufacturer, you can thus demonstrate quality and reliability for your products.  

What’s changed since the last update? 

BS EN ISO 9090:2019 supersedes BS EN 29090:1992, which is withdrawn. BS EN ISO 9090:2019 includes some technical changes with respect to BS EN 29090:1992. These include: 

• The Scope has been clarified and Clause 2 has been updated 
• A leakage requirement for unconnected female elements of a quick-action coupling has been added 
• The term “hose” has been replaced by “hose assembly” and the value for the leakage has been added various types of blowpipes have been covered 
• In 6.2.1, b) the lower test pressure has been updated