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Weld purging system purges tube and pipe joints up to 24 in. OD

PurgExtra® from Huntingdon Fusion Techniques HFT® purges tube and pipe joints from 1 to 24 in. OD. It allows the operator to purge at recommended rates initially and then to introduce additional purge gas to create desired results. A typical application is for extra inert gas with titanium welds to achieve the lower oxygen levels required for welding that material (about 20 PPM).

For welding joints that require interpass temperature control, the system allows extra argon gas into the welding zone to help cooling and also helps remove additional gases that are expelled by the outgassing that occurs as the metal is heated. This keeps the expelled gases from combining with the hot metal and oxidizing them.

The purging unit comprises two inflatable dams connected by a heat-resistant, flexible gas hose that has the IntaCal® gas release system. This allows the dams to be inflated correctly and then releases the inert gas to safely purge the space between the dams.