Weld Purge Film for Pipe Purging

Aug 2015 07
14 48 Fri
Written by HFT

When tubes and pipes of certain materials, such as stainless steel, titanium, copper nickel 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. Some products available include Inflatable Tube and Pipe Purging Systems PurgElite®, QuickPurge® and HotPurge™. These systems require an open end to enable the system to be retrieved after the weld is finished, meaning it is impossible to use one of these tandem system for closing welds. To overcome this difficulty Huntingdon Fusion Techniques, HFT® 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, but which can easily be washed away when hydrostatically testing the pipe or just by normal wash out.

To obtain a quality purge is not easy and it has been customary to fill pipes with expensive argon gas and keep the gas running at what is thought to be a suitable flow rate for an estimated period of time. In today’s climate of ever improving quality control and increasing demands on procedures with traceability, it is inappropriate to use such hit and miss methods to guarantee a satisfactory purge. It is not desirable to simply pour gas into a pipe assembly in the hope that a good purge and ultimately, a good weld will be achieved. This technique rarely works. It is so easy to cut a circle of water soluble film and place it a short distance inside each pipe end, before welding, using the Argweld® Super Water Soluble Adhesive™ to ensure a leak tight barrier, keeping the purging volume to the barest minimum. Argweld® Weld Purge Film® will save  operators large costs by minimizing gas usage and cutting down dramatically on time taken to make a purge. After welding, the water soluble film is simply washed away during the standard hydrotest cycle or by simply washing of the pipe interior and dissolved down to molecular level leaving no trace.

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MultiStrike Tungsten Electrodes Offer Safer, Cheaper TIG Welding

Jul 2015 27
14 48 Mon
Written by HFT

A special recipe for TIG welding electrode material offers significant benefits in quality, cost, safety and ease-of-use, says its British developer. MultiStrike® Tungsten Electrodes, developed by Huntingdon Fusion Techniques® were designed to address the growing concerns about the radio toxic thoria that is present in standard red tipped tungsten electrodes. It was found that other rare earth elements that are not radio toxic were also used in the industry for activating tungsten, as in the case of normal light bulbs and that a mixture of those elements added during the manufacturing process produced a superior tungsten electrode.

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Don't Over-inflate your Weld Purge System!

Jul 2015 23
14 46 Thu
Written by HFT

Many Inflatable Tube and Pipe Purging Systems are at risk of overinflating during the weld purging process. As the heat of welding rises, the inflatable dams can expand beyond their safe limits and in addition, other personnel working near the welding area can vary the gas flow or pressure at random causing over inflation and bursting. Once a burst occurs, the purge is lost and the weld will immediately oxidise in the presence of incoming air. The welder will then have to cease welding, grind out the oxidation and then start the whole process again.

To prevent such bursts, Huntingdon Fusion Techniques HFT® has designed and now manufactures a PurgeGate® Valve System in order to prevent any over-pressurising of Inflatable Tube and Pipe Purging Systems. These devices, which are fitted as standard on the HotPurge™ and QuickPurge® Systems (PurgeGate II), are offered as accessories for the PurgElite®, PurgExtra™ and any other manufacturers versions of Inflatable Tube and Pipe Purging Systems. They have an easy push fit connection and are simply, plug and play. The PurgeGate® Valves fit all system sizes, from 1” to 96” and can be moved from system to system.

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3 Reasons you Should Consider Welding as a Career

Jul 2015 20
14 23 Mon
Written by Todd Clouser

Perhaps one of the oldest professions, welding is still a promising career path today. Welding entails using heat to melt and fuse metal objects. Civilizations have relied on this process to create strong bonds for everything from gold boxes to tools since the Bronze Age. Despite this dependence on welding, the trend among high school counselors in recent years has been to guide students toward universities instead of vocational schools. At the same time, welders of the baby-boom generation have been retiring, resulting in a shortage of welders in the United States. Compounding the problem is the spike in demand for welders that the country’s oil and natural gas boom has created. As this infographic Tulsa Welding School developed shows, individuals these days can find lucrative welding positions with opportunities to travel the world. 

1. Work in a Variety of Industries

Top Industries for Welders:

  • Manufacturing employs 61 percent of welders.
  • Construction provides jobs to 11 percent of welders. 
  • Wholesale trade keeps 5 percent of welders in work.
  • Other services account for 5 percent of welding jobs. 

2. Find a Job Close to Home

Bureau of Labor Statistics: States with the Highest Welding Employment Levels

  • Texas: 52,130 welders
  • California: 25,030 welders
  • Pennsylvania: 17,400 welders
  • Louisiana: 16,610 welders
  • Ohio: 15,560 welders

3. Travel the Country / World in your Career

Traveling Welding Jobs:

  • Manufacturing plant maintenance
  • Ship building
  • Military infrastructure construction and repair
  • Oil pipeline installation and repair
  • NASCAR and motor sports
  • Underwater welding
Check out the infographic, “Welding Career Paths,” to learn more about how to become a welder, what welders do, how much welders make—some are pulling in as much as $200,000 a year—and much, much more about this promising and dynamic career path. 
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