Argweld® Multi Exhaust Pipe Weld Purging Systems
High quality circumferential butt welding of tube to tube, pipe to pipe and pipe to fitting requires inert gas to be used inside the bore to prevent oxidation and notching of the root penetration weld bead.The best systems devised for this are the Argweld® Pipe Purging Systems. They are quick, reliable, easy to use and attractively priced. The volume to purge is kept small, resulting in significant savings in both time and cost of inert gas used.The Argweld® Pipe Purging Systems are based on a simple idea. It comprises two protected inflatable dams connected by a spinal tube. The tube carries the gas to inflate the dams and the release valve to purge the space between them.The selected system is inserted into the bore of the pipe or tube to be welded with one dam either side of the weld joint.The dams are inflated to form a seal, after which the pressure in the system opens the purge valve, the inert gas is then fed into the space between the dams expelling the air. Welding can then be carried out, the inert gas ensuring a clean even penetration bead.Afterwards, the dams are deflated and the device easily removed.This uniquely designed system means that only one inlet is required for both dam inflation and introduction of the purge gas.Compared to other methods of gas purging for pipe welding, the Argweld® Pipe Purging System has a number of distinct advantages leading to major cost savings.