News

Read your Weld Purge from up to 1 km away with the PurgEye® 1000

purgeye, gas sniffer, oxygen monitor, weld purging, back purge monitorIt is not always practical when welding long tube lines or pipeline sections to measure the oxygen content in the purge gas close to the weld. Many welders face the challenge of the purge gas in the welding zone being contaminated when taking readings from a distance, leading to the risk of a failed weld that needs to be cut out and remade.

To overcome this problem, the PurgEye® 1000 is now available from Huntingdon Fusion Techniques HFT® that will display the oxygen level in the welding zone on a Weld Purge Monitor® screen that might be 10, 50 or even 1,000 metres away from the weld.

The PurgEye® 1000 comprises a sensing head that can be fitted onto any pipe weld purging system that transmits the oxygen level at the weld location electronically to a monitor, up to 1 km away.

Ron Sewell, Chairman for HFT® said: “The PurgEye® 1000’s sensing head can be fitted onto any Mechanical or Inflatable Tube and Pipe Weld Purging System from 1” (25 mm) diameter upwards. Therefore the oxygen level can be measured directly at the weld location. With this capability, the operator can be certain that the weld purge reading is correct and that the joint will not be adversely affected by oxidation.”

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HotPurge®, for Weld Purging Heat-Treated Chrome and High Strength Stainless Steel Pipework

pre heated welding, post heated welding, hot purge, pipe purging, tube and pipe weld purgingThe majority of structural applications are manufactured from high-strength steel, such as offshore structures, buildings and shipbuilding. It is therefore important that the steel joint is pre-heated prior to welding and then receives a post-weld heat treatment.

It is also vital that they welds are free from oxidation, however with the high temperatures and length of time at such temperatures, most weld purging systems are unsuitable.

The innovative HotPurge® Pipe Purging System has been developed by Huntingdon Fusion Techniques HFT for Heat-Treated Chrome and High Strength Stainless Steel Pipe Joints where the temperatures might be as high as 760ºC (1,400ºF) for many hours.

Georgia Gascoyne, CEO for HFT® said: “HotPurge® ensures the purge space remains tightly sealed at all times as the inflatable dams maintain an even seal throughout the weld cycle, irrespective of pressure rises or excessive flow rates of argon gas. The large central collar dramatically reduces the space to be purged and makes it easier to reach lower oxygen levels faster than with conventional purging systems.”

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Inflatable Rubber Plugs: Lightweight but Strong and Highly Resistant to Petrochemicals

rubber plugs, inflatable plugs, pipe stopping, pipe blockingIt has long been possible to seal sections of a pipe using an Inflatable Stopper. However there are applications where existing stoppers aren’t quite good enough for the job in hand.

Now, thanks to the new Range of Inflatable Rubber Plugs from the Pipestoppers® Division at Huntingdon Fusion Techniques HFT®, a whole new number of applications can be attended to.

These new Plugs can be inflated quickly using compressed air lines and are ideal for fast, reliable and safe stopping and blocking of pipes, joints, channels, inlets and a number of other uses.

Lightweight Inflatable Rubber Plugs can withstand temperatures from -40°C (-40°F) to 70°C (158°F) and are highly resistant to oils, hydrocarbons and petrochemicals. Available in sizes 2 - 78” (51 to 1,981 mm), each Plug has a wide degree of flexibility in diameter. 

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Successful Titanium Welding with Flexible Welding Enclosures®

welding chamber, titanium welding, inert gas welding, additive manufacturingIt is often necessary to weld titanium or nickel alloy parts in an oxygen free environment especially within the Aerospace and Additive Manufacturing Industries.

In order to achieve oxide-free welds, it is important that the welding zone is purged of oxygen to a level as low as 10 parts per million (ppm). Flexible Welding Enclosures® manufactured by Huntingdon Fusion Techniques HFT® are an ideal, low cost, very successful solution.

Luke Keane, Technical Support for HFT® said: “Our standard and specially made Enclosures are available for a fraction of the cost of a rigid welding chamber, providing a technically viable option to the very expensive metal chambers and purge boxes.”

“Special Flexible Welding Enclosures® can be designed and manufactured to suit any purpose. We’ve recently manufactured systems for complete robot manufacturing cells and for GTAW (TIG) as well as laser additive manufacturing applications.”

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PurgElite® for Zero Colour Tube and Pipe Welds

purgelite, tube and pipe purging, weld purging, huntingdon fusion, pruge bladdeWelders can spend hours filling entire tubes and pipes with an expensive inert gas in order to achieve oxide free, zero colour stainless steel welds.

After more than 40 years of innovation, design and manufacturing expertise in the field of tube and pipe weld purging, Huntingdon Fusion Techniques HFT® has introduced PurgElite®, a range of low cost Tube and Pipe Purging Systems to achieve a clean, oxide free, zero colour weld in just minutes.

Ron Sewell, Chairman for HFT® said: “To save welders the expense of completely filling tubes and pipes with an inert gas, PurgElite® Systems are available, manufactured to suit pipe diameters from 1” to 24” (25 to 600 mm). They are designed with a robust inflatable bag on either side of a spinal tube that is used for inflation. They inflate and seal in the pipe, restricting the volume that is needed to be purged, to just 250 mm either side of the weld joint.”

The special spinal tube is resistant to hot metal up to 300ºC (572ºF) and is super flexible to allow movement of the PurgElite® Systems around 180º bends if necessary. These spinal tubes are made of a low outgassing rate material, so there is no risk of weld contamination.

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Accurate Stainless and Titanium Weld Purging with the PurgEye® 200

weld purge monitor, titanium welding, oxygen monitor, handy purgeQuality Weld Purging is essential when welding metals such as stainless steel, zirconium, nickel alloys and titanium. The area around the weld must be purged of oxygen to as low as 50 parts per million (ppm) before, during and after welding to ensure all joints are metallurgically sound and oxide-free.

To remain at the forefront of Weld Purging Technology, Huntingdon Fusion Techniques HFT® have launched the updated hand-held PurgEye® 200 Weld Purge Monitor®, now with PurgeNet™.

Ron Sewell, Chairman for HFT® said: “The correct use of a Weld Purge Monitor®, designed and calibrated specifically for weld purging, will ensure that all welds remain free from oxidation and metallurgical imperfections.”

“The PurgEye® 200 is designed and manufactured with the HFT® revolutionary PurgeNet™, allowing networking to a range of accessories. Typically, one accessory allows direct interface to an Orbital Welder or any other automatic welding machine, so that the oxygen level in the vicinity of the weld can be monitored and the welding machine can be switched on or off according to pre-set oxygen levels. A second accessory is an audible and visual warning device that will signal externally when oxygen levels are lower and higher than pre-set levels.” 

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Low Cost Nylon Weld Purge Plugs™

orbital welding, nylon plugs, weld purging, weld purge plugs, back purge plugsIt is important when welding stainless steel and titanium tube and pipe joints to produce zero colour, oxide-free welds both on the inside and outside, although it is not always easy to weld purge stubs, elbows and tees.

For welding nickel alloy, titanium and stainless steel tubes and pipes, including stubs, elbows and tees, Huntingdon Fusion Techniques HFT® have designed and developed clinically clean, white nylon Weld Purge Plugs™, providing a great barrier for weld purging.

Luke Keane, Technical Support for HFT® said: “Where complicated pipework systems have to be filled with inert gas, Weld Purge Plugs™ are a perfect product to seal all holes and orifices for quality internal weld purging. They can also be used for weld purging small or odd diameter pipes where conventional inline pipe purging systems may not be practical.” 

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No Risk of Lost Welds with Weld Purge Film®

foam purge dams, purging film, weld purge paper, purge and weldLow cost weld purging can prove complex, with many welders making savings by constructing their own foam or paper dams in order to reduce the purge volume, making weld purging times shorter.

Such improvised purge dams have severe technical limitations that can lead to loss of welds when they leak or slip from position thus flooding the welding zone with oxygen.

To overcome these challenges Huntingdon Fusion Techniques HFT® have designed and developed the Argweld® Weld Purge Film® Kits to make weld purging affordable and successful.

Ron Sewell, Chairman for HFT® said: “With the use of our low cost Weld Purge Film®, welders can ensure that their dams do not come loose during welding, thus, no more lost welds!" 

Weld Purge Film® Kits can be used on pipe diameters up to 900 mm (36”) and for temperatures up to 300ºC (572ºF) without the material burning, coming loose and losing the weld purge.

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Heavy-Duty Leak Testing, Sealing and Stopping with Pipestoppers®

steel test plugs, leak testing, pipe stopping, drain test plugs, weld purgingBlocking pipes for heavy-duty leak testing, sealing and stopping is easy with Steel Plugs from Huntingdon Fusion Techniques HFT®’s Pipestoppers® Division.

HFT Pipestoppers® Steel Test Plugs can be used for low pressure testing and plugging pipes, pipelines and pipework fabrications and other orifices between 2 and 48” (50 to 1,200 mm) diameter.

Ron Sewell, Chairman for HFT® said: “The Steel Plugs Range is specifically designed for heavier duty applications such as long immersion in water, for use at higher temperatures or for contact with acidic or alkaline environments for which the Nylon, Aluminium and Inflatable Plugs in the Pipestoppers® Range are not suitable.” 

The HFT® Steel Plugs are available as single and double models with sealing rings made from viton, silicon or natural rubber for resistance to different temperatures and chemicals.

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Low Cost Weld Purge Monitor® for Stainless Steel Welding

weld purge monitor, oxygen monitor, ppm trace, purge welding, weld and purgeMeasuring the oxygen level before, during and after welding stainless steel is crucial to achieve oxide free, zero colour welds. During stainless steel welding, the oxygen content must be purged down to a level as low as 100 ppm.

The low cost, hand held, battery operated PurgEye® 100, designed and developed by Huntingdon Fusion Techniques HFT® is perfect for welding stainless steel, reading accurately from atmospheric oxygen level (20.94%), right down to 100 ppm (0.01%).

A customer recently said: “The PurgEye® 100 is one of the best, if not the best residual oxygen detector instruments on the market today. With its digital residual oxygen level LCD screen readouts measuring as low as 100 ppm and its large user friendly viewing screen making it easier for me to read. The PurgEye® 100 also has a great accuracy of oxygen, with speedy measurement's being displayed within seconds.”

The PurgEye® 100 is IP65 rated and comes with leak-tight push buttons, auto calibration features, vacuum-sealed leak-tight probe assembly, wrist/neck strap and tripod mount. 

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Weld Purge Dams for Dished Ends and Short Pipes

weld purge dams, purge bladder, back purging, purge and weld, weld purgeWeld Purging (back purging) describes the removal of oxygen from the vicinity of a weld before, during and after welding. For pipe and tank welding of stainless steels, titanium and chrome steels, it is good practice to restrict the area required to be purged, usually with an inflatable tandem weld purging system.

For the purging of short pipe pieces and dished end or dome end welds however, the tandem devices are unsuitable. Welders and their helpers over the years have created single dams to block the ends, of pipes and cylindrical tanks using easily obtainable, locally available material.

Ron Sewell, Chairman at Huntingdon Fusion Techniques HFT® said: “Even today, many companies are still allowing their technicians to spend many hours fabricating dams made of foam, cardboard, adhesive tape, wood, paper and so on. These materials contain a high percentage of water, which is very undesirable to have in the presence of a weld.”

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Bright, shiny, oxide-free welds with PurgExtra®

pipe weld purging, purgextra, purge bladder, back purging, oxide free weldsTubes and pipes made from titanium, stainless steel, chrome/nickel steels are mostly required to be welded in a non-oxidised environment in order to achieve a metallurgically correct, zero colour weld. Best results are obtained by reducing the volume to be purged, with an inflatable Weld Purging System.

Leading the way in Weld Purging Technology, Huntingdon Fusion Techniques HFT® have developed PurgExtra®, for purging tube and pipe joints from 1 – 24” diameter that provide an extra gas purge hose to speed up the purging process even further.

Additional advantages of this design improvement are that the operator can use the extra purge gas supply for welding reactive metal joints in particular, such as those made from titanium and zirconium. In addition, the extra gas can be used for cooling welded joints faster than normal, where permissible. 

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