News

Handy Purge Monitor, now with PurgeNet™

weld purging, back purging, purge and weld, handy purgeTo remain at the forefront of Weld Purging technology, World leading Weld Purging Experts and inventors of the Weld Purge Monitor®, Huntingdon Fusion Techniques HFT® have launched the updated hand-held PurgEye® 200 Weld Purge Monitor®, now with PurgeNet™.

When welding metals such as stainless steel and titanium, it is essential to measure the oxygen level before, during and after welding using a Weld Purge Monitor®.

Georgia Gascoyne, CEO for HFT® said: “PurgeNet™ allows 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 a warning lamp that can signal when oxygen levels are low and high according to pre-set levels.”

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Keeping Tube and Pipe Joints Clean when Welding

weld trailing shield, inert gas shielding, inert gas purging, weld purging, purge and weldIt is important when welding stainless steel and titanium tube and pipe joints to be able to have zero colour, oxide-free welds both on the inside and outside.

To achieve the conditions for zero colour, or oxide-free weld joints, it is necessary to remove the air around the joint to a level where the oxygen percentage is somewhere between 5 and 50 parts per million, subject to the metal and, to some extent, the application.

Removing the air from the vicinity of the weld inside and outside has to be carried out simultaneously and this is best carried out on the outside with an accessory called a Weld Trailing Shield® and on the inside with an Inflatable Pipe Purging System

A short video showing a Trailing Shield® attached to a TIG/GTAW welding torch can be seen here and you will notice how super clean the outside of the weld is.

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Low Cost one-way Valve for specific flow rate and pressure

purgegate, one way value, inflatable weld purging system, quick purge, huntingdon fusionThis low cost accessory has been designed and constructed to pass a maximum of 7.5 litres/min and 0.5 bar pressure.

Other versions of 1bar and above are also available.

Designated “PurgeGate®”, this nifty, hi-tech item has applications in both fluid and gas control. Its small size and low weight makes it valuable for small liquid dispensing machines, as well as large ones with multiple heads, where higher pressures and flow rates might be used to cater for the output of a multi-head machine.

PurgeGate® has found valuable applications in the Welding Industry, where inflatable devices are used for Weld Purging of tubes and pipes.

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Remote Monitoring of Weld Purge up to 1 km away

remote weld purging, weld purge monitor, purgeye, huntingdon fusion, oxygen traceWhen welding lengths of tube and pipework fabrications, as well as sections of pipelines of 20 metres length and more, one problem operators face is not receiving a fast and true weld purge reading from the purge zone.

Now, for the first time, Huntingdon Fusion Techniques HFT® makes it possible to have an immediate reading of the weld purge gas at the underside of the joint, from any distance up to 1,000 metres away with their PurgEye® 1000 Weld Purge Monitor®.

Luke Keane, Distributor Support for HFT® said: “By using a remote sensing head, which can be fitted onto any Mechanical or Inflatable Tube and Pipe Weld Purging System from 1” (25 mm) diameter upwards, the oxygen level can be measured directly at the weld location and the information will be electronically transferred to the monitor up to 1 km away. 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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New Tungsten Electrode Grinder

TEG3, TEG1000, tungsten grinder, red tipped tungstens, thoriated tungsten electordesEnsuring your Tungsten Electrode is sharpened correctly can help to improve weld quality. Tungsten Electrode Grinders are a convenient, safer and accurate way than other methods of grinding Tungsten Electrodes.

Back by popular demand, Huntingdon Fusion Techniques HFT® have re-initiated the manufacturing of the TEG-2 Tungsten Electrode Grinder, which retired from their product range a number of years ago, under the new name of TEG-1000.

Georgia Gascoyne said: “Since we stopped manufacturing the TEG-2 Tungsten Electrode Grinder, we’ve been inundated with requests to bring it back into our product range. We are excited to announce that it’s back, with a new modern look and attractive price.”

The use of the TEG-1000 Grinder will give repeatable Tungsten Electrode points every time, enabling consistent repeatable arc performance and welding results. Sizes 1.0 to 3.2 mm can be ground as standard, with other sizes catered for on request.

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Introducing PurgeNet™ and Accessories

visual alarm, purge alarm, purgenet, huntingdon fusion, weld purgingMonitoring the oxygen level before, during and after welding is essential. Welding in an environment of less then 100 ppm for stainless steel and less than 20 ppm for titanium ensures that welds are free from oxidation.

Allowing joints to oxidise when welding then involves mechanical or chemical oxide removal to prevent to loss of corrosion resistance at best and metallurgical imperfections at worst. Oxidation can be prevented by using a Weld Purge Monitor® to verify purge quality prior to the commencement of welding.

Now, Weld Purge Monitors® are available with PurgeNet™, a networking device which is manufactured as standard to five of the PurgEye® Monitors manufactured by Weld Purging Experts Huntingdon Fusion Techniques HFT®.

PurgeNet™ is used for communicating the current oxygen reading from a PurgEye® Weld Purge Monitor® to another piece of equipment, such as the visual warning accessory PurgeAlarm™ or a Dew Point Monitor with additional inter-pass temperature monitoring. 

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Weld Purging for Closing Welds

weld purging, weld purge film, argon purging, water soluble, paper damsWeld Purging a variety of pipes of different diameters can prove complex and costly, particularly when having to fill whole pipework systems with expensive argon gas. One solution that welders have traditionally devised has been to construct homemade foam or paper dams that are placed either side of the weld, constricting the purge volume to make weld purging times shorter.

Homemade foam or paper 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 Weld Purging Experts Huntingdon Fusion Techniques HFT® have designed and developed Argweld® Weld Purge Film® Kits to make weld purging affordable and successful.

Georgia Gascoyne, CEO for HFT® said: “Using our low cost Weld Purge Film® Kits can save welders both time and money, ensuring oxide-free welds are achieved time and time again.” 

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Low Cost Weld Purge Monitor®

MKV Monitor, Mark V weld purge monitor, weld purging, oxide free welds, stainless steel weldingWeld Purging is the act of removing oxygen from the vicinity of a weld before, during and after welding. The weld zone is usually confined, with the oxygen level being monitored to ensure it is reduced to a level where welds and their heat affected zones will not be affected by oxygen, leading to loss of corrosion resistance properties. For stainless steel, this is usually lower than 100 parts per million (ppm).

In order to measure the oxygen content, a Weld Purge Monitor® is used, avoiding the need to guess when the oxygen level is low enough to begin welding. The PurgEye® 100 IP65 Weld Purge Monitor®, designed and manufactured by Weld Purging Experts Huntingdon Fusion Techniques HFT® is available at a low cost, ensuring oxide-free, zero colour welds are achieved time after time.

A customer in the UK said: “When working with medium to large diameter exotic pipework, using the PurgEye® 100 can prevent you from having a very bad day! Previously, I only ever used the older model and the introduction of the PurgEye® 100 was a godsend. Anyone, from the welder who has had to carry out weld repairs due to root weld oxidisation (or coking) on such materials, to the directors facing an expensive bill for re-work and possible tarnished company reputation, to the client with their project now running behind schedule, will know exactly what I mean. Weld Purge Monitors® are a necessity.”

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Effective Pipe Plugging in Heavy-Duty Applications, with Aluminium Plugs

pipestoppers, huntingdon fusion, pipe plugging, leak testing, weld purgingEffective plugging and sealing of pipes in heavy-duty applications is essential, especially in refineries, offshore operations, plumbing operations as well as domestic and industrial water activities where the plug is likely to be immersed in chemicals or exposed to high temperatures.

The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® manufacture a Range of heavy-duty Aluminium Plugs to allow for arduous duties such as exposure to high temperatures and immersion in chemicals, in sizes 1.5 to 36” (38 - 900 mm).

Ron Sewell, Chairman for HFT® said: “The HFT® Pipestoppers® Range of Aluminium Plugs can be used to leak testing, isolation, sealing, stopping and weld purging of pipes. The Plugs are manufactured with a standard synthetic rubber seal. However, a variety of other sealing rings are available, including natural rubber, silicone, nitrile, neoprene and Viton to ensure they can be used for applications where greater resistance to a variety of materials is required.” 

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Accessories for Inflatable Weld Purging Systems

Argon gas hose, gas hose, argon delivery, heat resistant covers, pipe purgingIt is important when welding metals such as stainless steel, titanium and zirconium that the welding zone is purged of oxygen even as low as 10 parts per million (ppm) before, during and immediately after welding, in order to achieve a clean, oxide free, zero colour weld.

Weld Purging Experts Huntingdon Fusion Techniques HFT® now manufactures Accessories for their Range of Inflatable Weld Purging Systems, which include Argon Feed Hose for a leak-tight gas connection, PurgeGate® to ensure the inflatable dams do not burst due to over-inflation and Heat Protective Covers for all sizes and temperatures.

Tailor-made Argon Gas Feed Hose assemblies with leak tight fittings attach immediately to the HFT® Range of Inflatable Tube and Pipe Weld Purging Systems at one end and to the gas source at the other. These special, high quality Argon Gas Feed Hoses, which can also be used for transporting nitrogen, come complete with end fittings, providing welders with a guaranteed leak tight method of feeding non contaminated argon gas to their weld zone. 

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Closure Welds Made Easy!

inflatable weld purging dams, purge bladder, weld purging, purge welding, inert gas weldingWeld Purging closure welds can be challenging, especially when using a tandem inflatable system to reduce the volume being purged. Often, the system becomes irretrievable and therefore other weld purging methods have to be used, to avoid unwanted products in the pipe.

The innovative Weld Purge Dams from Huntingdon Fusion Techniques HFT® help to avoid some problems faced by closing welds, T piece joints and dome end connections where a conventional Tandem Weld Purging System cannot be used. The single ended dams are ideal for welding stainless, duplex, chrome steels and titanium joints.

The single ended Inflatable Weld Purge Dams, available for pipe diameters from 6 to 88 inches (152 mm up to 2,235 mm) are made of low vapour pressure materials specially selected for optimum weld purging results to provide the lowest oxygen reading in the fastest possible time with the minimum use of expensive argon gas. 

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Leak Testing, Debris Stopping and Weld Purging with Pipestoppers®

nylon plugs, weld purging, leak testing, aluminium plugs, steel plugsPipe plugs and stoppers are in use globally for a large variety of applications, including leak testing, weld purging, debris stopping and pipe freezing for repair or maintenance work for thousands of different industries.

Manufacturing a wide range of plugs and stoppers of up to two meters in diameter, Huntingdon Fusion Techniques HFT®’s Pipestoppers® Division will ensure that whatever your application, they have the solution.

Ron Sewell, Chairman for HFT® said: "There are thousands of applications our Pipestoppers® can support for so many industries. Some of these include: Construction of refineries and similar large oil and gas related plants, where plugs are required to block open ended pipework with leak tight seal. Construction of factories and housing for plugs used to test leak tightness of foul water systems.”

“Boating, yachting and all marine businesses where holes are frequently there to be blocked and an endless supply of water trying to enter. Use in aircraft construction and repair of submarines. The list really is endless, from very high tech to very low tech applications.”

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