The use of Weld Purge Film® for Pipe Purging

Soluble Weld Purge FilmWhen 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.


Read more ...

MultiStrike® Tungsten Electrodes Offer Safer, Cheaper TIG Welding

01W-MultiStrikesTungstenElectrodesA 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.

The MultiStrike® will actually strike an arc 10 times more than a red tipped thoriated tungsten, when tested under identical conditions.


Read more ...

Ensure your Weld Purging System doesn’t Overinflate by using a PurgeGate® Valve

01W-PurgeGateInflatableWeldPurgeSystemsMany 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. 


Read more ...

When the Temperature Rises, Protect your Purging Equipment with New Heat Resistant Covers

01W-HeatCoversPurgElitePurgExtra01Damaging your pipe purging systems due to high temperatures can be a thing of the past now that accessory Argweld® Heat Resistant Covers are available to protect them.

Although Huntingdon Fusion Techniques HFT®’s HotPurge™ Systems are very popular for heat- treated pipework, it is not possible to manufacture this design for diameters below 6”.

To fill the gap for smaller diameter pipework and for larger diameter pipework that doesn’t justify the use of HotPurge™ Systems, HFT® have designed and manufactured Heat Resistant Covers for both PurgElite® and PurgExtra™ Tube and Pipe Weld Purging Systems with a temperature endurance of up to 300ºC.

The Heat Resistant Covers are held on with ties and there are holes provided for the PurgElite® and PurgExtra™ fittings, such as inlet, exhaust and crimped end.

Read more ...

Where Access to the Job Site is Difficult

01W-InflatableStoppersBlocking pipes for purging or to carry out routine maintenance can be much easier with an Inflatable Pipestopper.

A range of standard and non-standard Inflatable Stoppers for tubes, pipes, pipework fabrications and ductwork is available from the Pipestoppers® Division of HFT®.

These 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 down time.

In machining applications, they can be inserted below a horizontal flange on a vertical pipe, to prevent machining fluid from falling below into expensive machinery such as pumps and turbines etc.


Read more ...

Pipe Plugging with a Difference

02-AccuFreezeThe Pipestoppers® Division of Huntingdon Fusion Techniques, HFT®, continues to grow with the addition of two new product ranges.

For making repairs to pipes with fluid inside, the Qwik-Freezer® and Accu-Freeze® Systems have been introduced. Freeze sealing is an increasingly popular alternative to “hot-tapping” and eliminates the need to shut down or drain down a system for repairs and maintenance.

These systems work by creating ice plugs (or “freeze seals”) either upstream of the repair site or on either side of an area where a pipe system needs to be maintained, for example, where a valve has to be replaced or a section of pipe needs to be cut out or where a leak has to be fixed.

No matter what the size of pipe or the fluid that is inside, one of the two models will most likely be suitable.

The Qwik-Freezer® System uses liquid carbon dioxide and a series of insulated freeze jackets to wrap around the pipes to freeze the contents inside the jacket. Accu-Freeze® uses liquid nitrogen with either copper coils wound around the pipe or with aluminium “clam-shell” style LN2 freeze jackets that are bolted together around the pipe.

Read more ...

Weld Purging Provides the Cleanest, Highest Quality and Lowest Cost Welds Ever!

01W-PurgEye100-IP65-WeldPurgeMonitorWeld Purge Monitors® are an essential instrument to help obtain non-oxidised, zero colour welds by monitoring the oxygen level when welding metals such as titanium, stainless steels and nickel alloys where a high quality weld is required.

By striving for zero colour welds, companies can eliminate the post weld cleaning costs, which can be very high, making the cost of each weld ultra significant.held, battery driven PurgEye® 100, monitors oxygen levels from atmospheric level (20.94%) down to 100 ppm (0.01%).

With over 40 years of innovation, design and manufacturing experience, Huntingdon Fusion Techniques HFT®’s hand held, battery driven PurgEye® 100 IP65, monitors oxygen levels from atmospheric level (20.94%) down to 100 ppm (0.01%).

Advancing the science of manufacturing beyond other designs, the PurgEye® 100 IP65 Weld Purge Monitor® is now a fully accredited IP65 standard rated instrument that can be used out on site, in rainy and dusty conditions.

Read more ...

QuickPurge® High Speed Pipe Purging System… Time is money!

10W-QuickPurgePipeWeldPurgeSystemWaiting for pipe joints to be purged ready for welding can take anything up to four hours, depending on the diameter of the pipe being welding and the method chosen for purging.
QuickPurge® III cuts these waiting times so dramatically that they amortise themselves in less than one weld.

A 36” diameter stainless steel pipe for example can be purged down to 100 parts per million (ppm) of oxygen in under 32 minutes. Compare this with purging using foam dams that will outgas heavily into the weld zone and will take hours, not a few minutes.

High speed pipe purging system QuickPurge® is leading the way in the field of purging tube, pipe and pipeline joints over 6” diameter, where oxygen levels are required to be as low as 10 (ppm) or less.

Huntingdon Fusion Techniques, HFT®‘s innovative design of the QuickPurge® System means that zero colour welds will be achieved and there will be no loss of corrosion resistance caused by oxidation.

Read more ...

O&M Offshore Exhibition - Can you find the QuickPurge®....?

AH O&M Offshore Exhibition 2015In June, HFT® visited one of our Exclusive Distributors, AH International in Denmark.

Svend Somner, pictured at the recent O&M Offshore Exhibition, along with his team received some up to date product training from HFT®.

Ukrainian born Anya, who works for AH International, recently won Student of the Year Award and was featured on the local news.  To see Anya in action driving a forklift, please visit:

For further 'Show News', say 'hi' to Technology and Industry

Read more ...

Are you following us on Instagram?

LogoInstagramHuntingdon Fusion Techniques HFT®, the Pipe Equipment Specialists, has recently joined Instagram @huntingdon_fusion. There are daily photographs posted showing our welding purging world, exhibitions training courses and places we visit.

There are also product updates posted to keep you at the forefront of the latest innovations and weld purging techniques.

Don’t forget to follow us!

After all, we are the Weld Purging Experts and Pipe Equipment Specialists.

Click Here To Follow Us



PurgEye® 200 IP65

03W-PurgEye200-WeldPurgeMonitorDeveloped for the process industries the portable PurgEye® 200 IP65 Weld Purge Monitor® meets the needs of higher welding specifications requiring oxygen levels down to 10 parts per million (ppm).

Weld Purge Monitors® are an essential instrument to help obtain non-oxidised, zero colour welds.

Huntingdon Fusion Techniques HFT®’s hand held, rechargeable battery driven PurgEye® 200 IP65 model is totally waterproof and dustproof, has warning icons appear on the large screen to show low battery, low sensor conditions and also displays oxygen readings in % or ppm very accurately down to 10 ppm.

It is probably the lowest cost Weld Purge Monitor® of its kind even though it contains an internal electromechanical pump for drawing samples of purge gas automatically over the sensor before discharging it to the atmosphere.

The long life sensor eliminates the need for changing cells once every year or so, as is the case with wet cell instruments.

Read more ...

Weld Purging Courses

HFTConference Room smlSome people have already signed up in readiness for our up and coming "Weld Purging Best Practices" course.

Is there anybody who would like to join us in beautiful sunny West Wales for our next course?

Dates are to be confirmed.

Of course, for those who cannot make it to our location, our Specialists will travel to any part of the World to provide you with individual training courses for you and your staff.

Call us today on +44 (0) 1 554 836 836