News

CO2 Pipe Freezing with Qwik-Freezer™


qwik freezer, pipe freezing, free sealing, valve changingThe Pipestoppers® Division at Huntingdon Fusion Techniques HFT® provides a cost saving solution to carrying out repairs or modifications on pipes with liquid inside.

Qwik-Freezer™, the industry standard portable CO2 Pipe Freezing System requires little set-up time and is the only low cost CO2 Pipe Freezing System capable of making ice plugs in pipes up to 8” (200 mm) diameter.

Qwik-Freezer™ kit is easy to use. A specially designed jacket is wrapped around the pipe at the point where the freeze is required. A nozzle on the jacket is then coupled to a cylinder of liquid CO2 by means of a high-pressure hose. When the liquid CO2 is injected into the space between the Qwik-Freezer™ jacket and pipe, it immediately expands to form a solid carbon dioxide (dry ice) at a temperature of -78ºC (-109ºF). This low temperature quickly freezes the contents forming a secure “ice plug” which seals the pipe.

Read more ...

Weld Purge Film for a Variety of Pipe Sizes


Weld Purge Film, water soluble film. weld purging, purge and weld, back purgingLow cost weld purging a variety of tubes and pipes sizes can be achieved by the use of low cost Weld Purge Film®.

Weld Purging Experts, Huntingdon Fusion Techniques HFT® recommend switching home made dams produced of unsuitable material, to their low cost Weld Purge Film® to achieve oxide free, zero colour welds.

Ron Sewell, Chairman for HFT® said: “Weld Purging can be challenging as well as expensive, which is why many welders today continue to construct their own dams to cut costs. Homemade dams made from material such as foam, sponge or paper can often lead to loss of welds when they leak or slip from position thus flooding the welding zone with air.”

Read more ...

Accurate 10 ppm Weld Purge Monitor®


purgeye 600, weld purge monitor, weld purging, back purge, oxygen analyzerReactive alloys such as zirconium and titanium present challenges to welding engineers. Many industries today are using these materials for their durability and high corrosion resistance properties, but are faced with having to avoid expensive waste and rework.

An effective Weld Purge Monitor® present, in conjunction with weld purging equipment, when making joints will ensure engineers have an accurate oxygen reading before, during and after the welding cycle.

Huntingdon Fusion Techniques HFT®, who have long been acknowledged as International Leader and Manufacturer in Weld Purging Technology, have a unique, all singing and dancing Weld Purge Monitor®, the PurgEye® 600, which reads from atmospheric level of oxygen (20.94%), down to one part per million (0.0001%).

Read more ...

High Precision Tungsten Electrode Grinder

TEG-1000. tungsten electrode grinder, multistrike, red tipped tungstens

To produce optimum arc stability, improve arc starting and subsequently weld quality, a dedicated Tungsten Electrode Grinder should be used for sharpening all Tungsten Electrodes during TIG welding.

Huntingdon Fusion Techniques HFT® state-of-the-art TEG-1000 Tungsten Electrode Grinder will ensure the grinding of each Tungsten Electrode results in clean and smooth finishes, with no splintering and eliminating arc jumping. The reliability of the equipment means that tip consistency is guaranteed and this is especially important with automated welding operations.

Luke Keane, Technical Sales Manager for HFT® said: “Issues often occur when Tungsten Electrodes are ground incorrectly and when it comes to TIG welding, Tungsten Electrodes are the most important part of the application.

Read more ...

Weld Purging of Heat-Treated Pipework

hotpurge, welding Chromium-molybdenum (chromoly), weld purging, pre heat welding, post weld heat treatment

Some high strength steels need to be pre-heated prior to welding and may also require a post-weld heat-treatment.

Both pre- and post- weld heat treatment is necessary to prevent cracking, but temperatures up to 300ºC (572ºF) must be maintained for lengthy periods. To prevent oxidation, the inside of piping needs to be purged continuously using a specialised pipe weld purging system.

HotPurge® has been developed by International Weld Purging Specialists Huntingdon Fusion Techniques HFT®. It is an Inflatable Pipe Purging System for use with High Strength Steel Pipe Joints where pre-and post-weld heating temperatures might be as high as 300ºC (572ºF) for lengthy periods.

Manufactured in sizes 6 to 88” (150 to 2,235 mm), HotPurge® Systems can be used repeatedly for weld purging and can keep the oxygen levels below 100 parts per million (ppm) throughout the welding cycle, ensuring oxidation-free welds, without the metallurgical imperfections caused due to rapid heating and cooling.

Read more ...

Stainless Steel Pipe Welding Made Easy

weld purge dams, purge bladder, back purging, purge and weld, weld purge

Welders often face difficulties when welding stainless steel T piece joints, dome end connections and closure welds, where a tandem Inflatable Pipe Purging System is unsuitable.

Weld Purge Dams from Huntingdon Fusion Techniques HFT® offer a great solution, available for pipe sizes 6 to 88” (150 – 2,235 mm).

Georgia Gascoyne, CEO for HFT® said: “Weld Purge Dams are a more effective alternative to foam or cardboard dams that are still frequently handmade by welders, which can often be unsuitable for Weld Purging. Restricting the pipe volume has proven to be the most cost effective solution and Weld Purge Dams offer a great solution where Tandem Weld Purging Systems are not practical, especially welding metals such as stainless steels, titanium and zirconium.”

Read more ...

New Inflatable Rubber PetroChem Stoppers

weld backing tape, back purging, weld purge, weld purging techniques

The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® have launched new Rubber PetroChem Stoppers, for pipe stopping where access is difficult.

CEO Managing Director, Georgia Gascoyne said: “Our new Rubber PetroChem Stoppers are an easy way to stop the flow of gas or liquids along a pipe or duct. Each Stopper has a longer length than diameter, which prevents them from tipping over and losing their seal inside the pipe. They are also manufactured with a ribbing to prevent slipping.”

The Inflatable Rubber PetroChem Stoppers are manufactured from high quality materials, ensuring a long life span and are resistant to a large number of chemicals and petrochemicals.

Read more ...

Back Purging with Argweld® Weld Backing Tape®

weld backing tape, back purging, weld purge, weld purging techniques

Back Purging is the process of protecting and shielding the back side or under side of the weld during welding to prevent oxidation.

Back Purging with fiberglass Weld Backing Tape® supports weld roots and can prevent oxidation, sugaring, achieving clean, oxide free welds.

Luke Keane®, Technical Sales Manager for Huntingdon Fusion Techniques HFT® said: “We manufacture a range of Weld Backing Tape® available up to 600 amps. This innovative method of back purging will ensure a high quality finish suitable for plate, sheet and pipe welding."

Unlike ceramic fibre, Weld Backing Tape® has no true melting point so it works satisfactorily with TIG or MIG welding (GTAW or GMAW) where temperatures can reach up to 6,000ºC. This overcomes the concerns associated with ceramic fibre versions that have a melting point of 1,800ºC.

Read more ...

Expanding Rubber Plugs for use with Oils, Hydrocarbons and Petrochemicals

Rubber plugs, inflatable stopper, inflatable plug, pipe stopping, pipe blocking

Often, pipes containing oils, hydrocarbons and petrochemicals need to be blocked but not all plugs are suitable for such applications.

The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® manufacture a range of Rubber Plugs, for fast, reliable and safe pipe stopping.

Ron Sewell, Chairman at HFT® said: “There are many applications where our Rubber Plugs are suitable, including for use in water, sewage, fluid production (milk, beer, chemicals), petrochemical, pharmaceutical and gas pipeline systems. Challenging pipe stopping conditions can cause major inconveniences, with many alternative products not being able able to handle such intense conditions."

Read more ...

Distance Weld Purge Monitoring

purgeye 1000, remote weld purging, remote weld purge monitor, oxygen reader

GTA/TIG welding long pipelines made of stainless steel can be found in many different industries including Oil and Gas, Nuclear and LNG. The use of stainless steel can offer many advantages including corrosion resistant properties and cost-effectiveness of the alloy.

With Stainless Steel being a reactive material, the oxygen in the protective gas must be purged down to under 100 ppm before, during and after welding, which can cause some difficulties in long pipelines.

Celebrating their 45th Anniversary in 2020 as International Leaders in Weld Purging, Huntingdon Fusion Techniques HFT®’s PurgEye® 1000 Distance Weld Monitor now makes it possible to have an immediate reading for the weld purge zone up to 1,000 metres away!

Read more ...

Save Time and Money with a High Quality Inflatable Purging System

purgelite, weld purging, back purging, oxygen purging, stainless steel welding

When welding tubes and pipes made of alloys such as stainless, duplex and chrome, it is important to eliminate the oxygen internally with an inert gas. This will help prevent oxidation, discolouration and will ensure a good internal weld profile.

Weld Purging long pipelines can be costly and time consuming, so restricting weld purge volumes will achieve huge savings in time and inert gas.

Huntingdon Fusion Techniques HFT® design and manufacture PurgElite®, a range of low cost Tube and Pipe Purging Systems to achieve a clean, oxide free, zero colour weld in just minutes, available from 1” (25 mm).

Georgia Gascoyne: “2020 marks our 45th years of innovation, design and manufacturing expertise in the field of tube and pipe purging systems. Our PurgElite® Systems help achieve a clean, oxide free, zero colour welds.

Read more ...

Weld Purging at a Low Cost

weld purge plugs, weld purging, back purging, purge and weld, huntingdon fusion

There are many occasions where Tandem Inflatable Tube and Pipe Purging Systems are not suitable and welders are often left to construct their own Weld Purging Equipment.

Often, homemade purging devices are unsuitable and can often lead to loss of welds due to oxidation.

Weld Purging Experts Huntingdon Fusion Techniques HFT® manufacture a range of low cost, lightweight Weld Purge Plugs for a variety of applications for pipe sizes 0.5 to 6” (12 to 152 mm) diameter.

Luke Keane, Technical Sales Manager for HFT® said: “Typical purging applications for our Weld Purge Plugs include small or odd diameter pipes, short, complicated or variable size assembles where a purging system or inflatable dam would be too long or other purging equipment may not be available or practical.”

Read more ...

Subcategories