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Welders often face difficulties when welding stainless steel T piece joints, dome end connections and closure welds, where a tandem Inflatable Pipe Purging System is unsuitable.
Weld Purge Dams from Huntingdon Fusion Techniques HFT® offer a great solution, available for pipe sizes 6 to 88” (150 – 2,235 mm).
Georgia Gascoyne, CEO for HFT® said: “Weld Purge Dams are a more effective alternative to foam or cardboard dams that are still frequently handmade by welders, which can often be unsuitable for Weld Purging. Restricting the pipe volume has proven to be the most cost effective solution and Weld Purge Dams offer a great solution where Tandem Weld Purging Systems are not practical, especially welding metals such as stainless steels, titanium and zirconium.”
“Displacing the oxygen with an inert gas before, during and after welding helps to create welds that are free from oxidation. Once the Dam is inflated using the purge gas and seals all around the internal circumference of the pipe, the excess inert purge gas spills out and purges the space around the weld joint. The air (oxygen) is then released out and into the pipe length through a series of venting exhausts on the dam.”
Weld Purge Dams are manufactured with four pull tags located around the circumference, thus providing ease of positioning and retrieval. They are fitted with a dual inflation and purge hose, an additional purge gas hose and an exhaust vent which can be connected to one of the HFT® Weld Purge Monitors®. The additional purge gas hose is suitable for introducing extra purge gas into the weld zone at any time to cool welds, to meet interpass temperature specifications, or to provide more inert gas in the event of titanium, zirconium or special stainless applications needing a guaranteed zero colour weld.
Made in Wales – Manufacturer of the Year and Welsh Busines Awards – Export Business of the Year.
Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.
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Read the published article directly in the magazine OilVoice. |
You are not allowed to use or copy any of this material or content without the written permission of Huntingdon Fusion Techniques HFT®, copyright protected. All rights belong to Huntingdon Fusion Techniques HFT® exclusively. Not for any reproduction without consent.
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