Low Cost 1 PPM Weld Purge Monitor®

purgeye, nano, weld purging, oxygen reader, ppm traceFor many years, oxygen monitors and gas analysers have been used for weld purging. These instruments have been designed and calibrated for accuracy at atmospheric oxygen level, but not for weld purging where accuracy is required when reading much lower oxygen levels.

With their scientific background, Huntingdon Fusion Techniques HFT® have designed and manufactured the PurgEye® 300 Nano, the World’s first and only low cost, no frills, Weld Purge Monitor® that measures accurately down to 10 parts per million (ppm) on a large alpha numeric display.

Ron Sewell, Chairman for HFT® said: “The PurgEye® 300 Nano has been developed for weld purging where data logging, alarms and welder control are not necessarily required. It is small, lightweight and inexpensive. There are no knobs, no switches, no controls, making this a really simple, ‘plug and play’ monitor.” 

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Double Freezing technique for large diameter Valve replacement

pipe freezing, tube freezing, valve changing, cob industriesReplacing valves in a pipeline can be a challenge, especially when the pipelines have liquids running through them. One option is to completely drain the system to make the repairs, which can prove costly with respect to loss of expensive fluid, heating or cooling costs, security matters, time that system is down plus labour costs.

Pipe Freezing Experts Huntingdon Fusion Techniques HFT® recently introduced the Qwik-Freezer™ Systems to their Pipestoppers® Division. These systems create ice plugs or freeze seals in the pipes, avoiding the requirement to drain systems.

Qwik-Freezer™ is the industry standard portable CO2 Pipe Freezing System, in use around the World, covering pipe diameters from 3/8” – 8” (9 – 200 mm).

The quick and easy to use system requires very little set-up time and is the only CO2 Pipe Freezing System capable of freezing larger pipe diameters.

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Ron Sewell talk Fabtech and all things Weld Purging

Weld purging, welding chamber, flexible enclosure, fabtech, huntingdon fusionHuntingdon Fusion Techniques HFT®’s Chairman Ron Sewell talks all things Fabtech and Weld Purging on episode 7 of Arc Junkies’ Podcast.

Listen to the Podcast in full

In November, HFT® will be exhibiting at Fabtech, along with our USA Partner, COB Industries. This year we will be featuring our remodelled Tungsten Electrode Grinder, along with our Special Flexible Welding Enclosures®.

We'll be on Booth No. B37049

We will have more information coming soon, so don't forget to get the dates pencilled in your diary ... 6th - 9th November, McCormick Place, Chicago, USA.

Inflatable Stoppers for Petrochemical Applications

pipe plugging, tube plugging, pipe stopping, overnight stopper, debris stoppingBlocking pipes or other orifices to carry out routine maintenance and other applications can prove challenging where hydrocarbons are present in liquid and gas form.

Now, a range of hydrocarbon resistant Inflatable Pipestoppers is available for the Petrochemical and Oil and Gas Industries. Manufactured in cylindrical and spherical formats from 1 – 96” (25 – 2,440 mm) in diameter with a high-grade latex, rubber internal inflatable bag covered with a petrochemical resistant layer, which has a tough, woven impregnated nylon outer cover for use up to 90ºC (194ºF).

The versatile Inflatable Stoppers are used to service a wide variety of industrial applications. As “overnight stoppers” they provide a strong barrier in pipeline activities, to prevent foreign bodies entering the line during downtime.

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Highest Quality Welds made with Lower Costs

purgeye, weld purge monitor, oxygen analyzer, gas reader, ppm traceWelding stainless steel, titanium, zirconium, niobium and other metals sensitive to atmospheric gases, requires oxygen levels to be as low as 10 ppm and in some cases, knowledge of dew point level in the shielding and purging gas.

Many welds of this nature are still welded with archaic or home-made items to try to shield the weld, but most fail to give satisfactory protection resulting in oxidised joints, which can lead to metallurgical failure at worst and the necessity for additional processes such as mechanical or acid removal of the oxide film.

The extra processes of cleaning/oxidation removal can be so easily negated by using professionally designed and manufactured products and a Weld Purge Monitor®. One such monitor, which measures oxygen level down to 1 ppm is the PurgEye® 300 Plus, now with PurgeNet™!

This lightweight, portable gas analyzer indicates actual oxygen levels down to 1 ppm (accurate to 10 ppm) on a large alpha-numeric OLED display, perfect for achieving oxide-free, zero colour welds time and time again.

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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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