When tubes and pipes of certain materials, such as stainless steel, titanium, nickel alloys and zirconium are welded together, it is desirable to purge the oxygen out of the inside of the weld zone to prevent it from reacting with the hot metal and causing oxidation, porosity and corrosion.
Huntingdon Fusion Techniques (HFT®), whose main US office is located in West Melbourne, Florida, has developed and manufactured Argweld® Weld Purge Film kits, with water-soluble materials that can be used for open assemblies and closing welds. The film produces an impenetrable purge barrier, which can easily be washed away when hydrostatically testing the pipe or just by normal wash out with water.