Fast Purging of Heat-Treated Pipework

Chrome steel pipe joints, such as those used in the power industry for high pressure, high strength pipework, need to be pre-heated for welding and also require a post weld heat treatment. Equally, some high strength stainless steel weld joints need to undergo similar heat-treating cycles. Weld joints of this nature need to be purged of oxygen and welded in an inert atmosphere, to prevent the oxidation that would otherwise lead to loss of corrosion resistance and imperfections in the joint ...