HFT Releases New Gas Detection / Analyzing Instrument

Aug 2015 14
16 57 Fri
Written by HFT

For the first time, a unique Weld Purge Monitor® Gas Detection and Analyzing Instrument has been designed and developed that reads from atmospheric level of oxygen down to one part per million (ppm), breaking all technological boundaries in one instrument.
 
Huntingdon Fusion Techniques Limited HFT® continues to grow its innovation of Weld Purge Monitors® that were designed and manufactured 40 years ago this September. The PurgEye® 600 incorporates the features and benefits of all the other Weld Purge Monitor® designs in the HFT® Family Range, but for the first time, this one instrument has a full range of measurement reading from atmospheric concentration (20.94%), down to 1 ppm, accurate to 10 ppm. Readings are indicated either as parts per million or in percentage.

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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.

For more information please contact:
michaelareay@huntingdonfusion.com
www.huntingdonfusion.com

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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.

For more information contact:
michaelareay@huntingdonfusion.com
www.huntingdonfusion.com

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