HFT Releases New Gas Detection / Analyzing Instrument
Written by HFT
For the first time, a unique Weld Purge MonitorÂ® 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 HFTÂ® continues to grow its innovation of Weld Purge MonitorsÂ® that were designed and manufactured 40 years ago this September. The PurgEyeÂ® 600 incorporates the features and benefits of all the other Weld Purge MonitorÂ® designs in the HFTÂ® 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.
Weld Purge Film for Pipe Purging
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 PurgEliteÂ®, QuickPurgeÂ® and HotPurgeâ„˘. 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, HFTÂ® has developed and manufactured ArgweldÂ® Weld Purge FilmÂ® 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 todayâ€™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 ArgweldÂ® Super Water Soluble Adhesiveâ„˘ to ensure a leak tight barrier, keeping the purging volume to the barest minimum. ArgweldÂ® Weld Purge FilmÂ® 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
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. MultiStrikeÂ® Tungsten Electrodes, developed by Huntingdon Fusion TechniquesÂ® 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.Read More
Don't Over-inflate your Weld Purge System!
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 HFTÂ® has designed and now manufactures a PurgeGateÂ® 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 HotPurgeâ„˘ and QuickPurgeÂ® Systems (PurgeGate II), are offered as accessories for the PurgEliteÂ®, PurgExtraâ„˘ 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 PurgeGateÂ® Valves fit all system sizes, from 1â€ť to 96â€ť and can be moved from system to system.
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