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When welding stainless steel, titanium and other corrosion resistant materials, an inert environment for welding is high priority to retain the metals corrosion resistant properties. During the welding process the weld seam is subjected to heat and air which causes oxidation if the correct processes are not adhered to.

With purging, an inert gas is used to protect the weld area until it has cooled to the point that oxidation no longer will occur. It removes the contaminating air from the piping and vessels to reduce chances of corrosion. Purging can also shield a hazardous environment when welding. 

When welding corrosion-resistant materials and purging, it is important to be aware of the oxygen content, that must be blow certain parameters, according to the base metal that you intend to weld.  Oxygen levels are measured in PPM (Parts per million). Because of this, it is wise to monitor the complete procedure with an oxygen monitor. This sensor should be able to measure accurately to 1 part per million (PPM) oxygen.

HVWH can supply you with all your gas purging equipment requirements, to get you the best outcome for the job at hand.

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This is just a brief overview of the products we stock and supply, HVWH will always try and tailor products to suit your specific need.