After a decade of manufacturing QuickPurge® Pipe Purging Systems, Huntingdon Fusion Techniques HFT® has developed and launched the vastly improved QuickPurge® III System suitable for welding stainless steel, titanium or alloy piping from 6 to 96″ (150 to 2440 mm) diameter. Key applications are for welding in refineries, mining operations, power stations, LNG gas terminals, compressor stations LNG carriers, pipelines and all process industry pipework.
The new design has a new textured elegant black and grey ‘state of the art’ material which has a greater temperature resistance than before and a lower out-gassing rate to help speed up the weld purge. The new design has a simple but very effective weld purge gas release system called IntaCal®. No more complicated valves to set up with trial and error tests as this purge gas release system is using state of art technology. IntaCal® is a very clever device that allows inflation of the dams and purging of the system at the optimum flow rate to ensure minimum usage of expensive inert gas.
The bladder comes with PurgeGate® valve which regulates the gas flow during purging to prevent the Inflatable Tube and Pipe Purging Systems from over inflating.
The new positioning device RootGlo® uses a luminescent glow band in the center of the device to help the welder position QuickPurge® Systems within the dark cavity of the pipe.
Argweld® QuickPurge® Systems are used for high quality, reliable welding of reactive metal tube and pipe joints to ensure a very fast weld purge time and a very high quality weld root, free from oxidation, discolouration and coking.
Typical weld purge times for the Argweld® QuickPurge® System would be less than 8 minutes for a 36″ pipe down to 0.1% oxygen and correspondingly faster for smaller diameters. Many leading international pipework fabricators rely on Argweld® QuickPurge®Systems for the dramatic savings in time and volumes of weld purge gas and have thereby reduced their operating costs significantly. Working with Argweld® QuickPurge® Systems gives infinite flow control with no risk of burst dams and provide super high speed welding of pipe joints that have to be purged.
These purge systems also avoid the need of filling the pipes with inert gas and consequent dumping a line full of argon at the end of a weld, an important health and safety objective.
Argweld® QuickPurge® Systems have become internationally established and have been used on cryogenic pipelines and pipework in the USA, Canada, UK, Australia, South East Asia, Eastern Europe as well as on non-cryogenic pipework in practically every country in the World for standard stainless steel pipe purging applications. One key application is the weld purging of LNG pipelines and pipe work joints when constructing gas terminals, LNG re-gasification terminals, gas compressor stations and also LNG carriers, plus many more. As a very robust product, Argweld® QuickPurge® Systems can be used over and over again further reducing manufacturing costs. Operators can complete their tie in or ‘Golden Welds’ with the security of knowing that they are using the best weld purge system available to prevent the risk of NDT failure.
The systems are manufactured from a heat protective material so that the high temperatures at close proximity to the weld do not damage the devices. The purge bladders have a quick fit coupling for purge / inflation hose complete with ‘O’ ring for gas tight sealing and a stainless steel collet to hold the tube mechanically tight. The new design comes fitted with “Anti-Release” circlip to prevent parts accidentally separating inside the pipe. Special attention has been paid to the selection of low vapour pressure materials to minimise outgassing in the purge space during welding giving greater assurance of obtaining a clean oxide free weld root. The unique design of the central sleeve dramatically reduces purge volume. In combination with the multiple sintered outlets and IntaCal® gas release mechanism, the weld purge gas is dispersed evenly without turbulence.
Argweld® QuickPurge® are ‘plug and play‘ systems, ready to use with no set up time. Perfect central alignment with the weld root is possible with the RootGlo® centering band. The positioning strip will continue to glow in the dark for 12 hours and can easily be seen through the weld root, which allows fast and accurate alignment. The system has no metal parts that can scratch internally polished stainless steel tubes or pipes or cause cross contamination, which helps in cases where post weld NDT inspections are carried out.
The system has four pull straps on each dam multiple stitched with tough kevlar thread, each with a breaking strain of over 1000 lbs. This enables easy manipulation around bends and fittings as well as in straight pipes. Friction free coatings allow easy movement through pipes from one joint to another.
With PurgeGate® technology, each device has absolute protection from bursting and over inflation of the systems.
Dramatic savings of time, gas and money that can be demonstrated when using the Argweld® QuickPurge® Systems. The purge gas volume needed to be purged is greatly reduced, providing lower operating costs, with gas and time savings, so each Argweld® QuickPurge® System pays for itself in just a few welds!
All Argweld® QuickPurge® Systems are heat resistant. For Pre-heated pipe work please refer to the Argweld® HotPurge™ Weld Purge Systems.