Weld purging tubes and pipes for the oil and gas industry is crucial when joining metals such as stainless, duplex and chrome steels, as well as nickel alloys, titanium and zirconium. However, when welding larger pipe diameters it is not cost effective to completely fill tubes and pipes with expensive inert gas. Huntingdon Fusion Techniques’s (HFT) Quickpurge systems reduces the space that needs to be purged, thereby reducing purging time. Using Quickpurge means there is no longer a need to fill complete pipes with an inert gas. The system is simply inserted into a tube or pipe, inflated within the pipe, restricting the area that is to be welded, removing the oxygen down to 100 ppm within minutes. There is an additional gas input line, allowing extra purge gas to be introduced for extra high speed purging down to the lowest oxygen levels, which is perfect for larger diameter pipes where quality welds are required. This extra cold argon gas input is perfect for mitigating the extra heat produced by the Plasma/TIG process.
Intacal combined with the integrated Purgegate device makes it possible to safely inflate the systems with argon gas, for sealing and then purging the space between the dams where the weld joint is located. With Purgegate, any risk of over inflation due to pressure or flow increase is eliminated.
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