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Displaying items by tag: Huntingdon Fusion Techniques

Friday, 31 July 2020 10:20

PurgElite® Tandem Pipe Purging System

Inflatable Tube and Pipe Purging Systems simplify the process of inert gas purging by restricting weld purge volumes, making 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 that help to achieve a clean, oxide free, zero colour weld in just minutes, available from 1” (25 mm).

Ron Sewell, Chairman for HFT® said: “Purging a pipe prior to welding is critical to the success of welding stainless steel, titanium, zirconium and other reactive alloys. PurgElite® systems are simply inserted in the pipe and positioned with the aid of the luminous RootGlo®. When the gas flow is started, the dams inflate, sealing inside the pipe and argon then purges the interspace automatically. A Weld Purge Monitor® connection is standard on each PurgElite®, so the welder can monitor the oxygen content of the purge volume throughout the entire welding process.”

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Each PurgElite® features IntaCal®, a purge gas feed device, which means there is no complicated valving for the operator to adjust and set. Quick connect/disconnect fittings with collets and ‘O’ ring seals for gas tight sealing, fitted with anti-release circlips are fitted to all systems to prevent parts accidentally separating inside pipes.

HFT®’s innovative PurgeGate® Valve is available as an accessory, a unique one way valve suitable for all types of Inflatable Pipe Weld Purging Systems. PurgeGate® regulates the gas flow and pressure during weld purging to prevent the dams from over inflating and bursting.  

Heat Resistant Covers with a rating up to a temperature of 300ºC are available as accessories to protect the inflatable dams. These are attached with ties sewn into the covers.

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Watch the PurgElite® demonstration video, available at: https://youtu.be/Q-dSRpPvd1s

Huntingdon Fusion Techniques HFT® have a worldwide Exclusive Distributor network, which can be found at www.huntingdonfusion.com.

Made in Wales ‘Manufacturer of the Year’ and Welsh Business Awards – Exporter of the Year.

Huntingdon Fusion Techniques HFT® are Weld Purging Innovators, Designers and Manufacturers with offices located globally.

Huntingdon Fusion Techniques HFT® invented the ‘Weld Purge Monitor®’ in 1975 and own all international intellectual property rights and registered trademarks.  

Weld purging is the act of removing, from the vicinity of the joint, oxygen, water vapour and any other gases or vapours that might be harmful to a welding joint. Such gases may combine with the metal to form undesirable compounds that may reduce corrosion resistance or may be instrumental in creating cracks or other structural defects in metals.

www.huntingdonfusion.com

Published in Production
Thursday, 04 June 2020 10:28

CO2 Pipe Freezing with Qwik-Freezer™

The 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.

The Qwik-Freezer™ ice plug forms only in a section of pipe covered by the jacket so the resulting rise in pressure is very small and there is no damage to the pipe. The Qwik-Freezer pipe freezing kit can be used safely on iron, lead, stainless steel, copper, brass and plastic pipe.

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Case Study:

Low-cost accessory obviates power station shutdown.

A new compressor installation, to be completed within a short window of time, was going well until a problem was discovered. The design drawings failed to show that a cold water valve extension handle clashed with the air inlet pipe of the compressor. Critically, this was the only isolating valve from the cooling water main header and could not be moved without closing the cooling water system.

This would have also meant shutting down the whole power station, which was not an option. Potential solutions included re-routing the inlet pipework of the compressor and contracting in a specialist pipe freezing company to enable the valve to be moved. All initial potential solutions would have taken time to organise, which could have affected the timely completion of the project.

Freezing was considered to be the best option but this valve was welded into place and freezing would have to be made far enough up stream not to be adversely affected by the applied heat from the grinding and re-welding operations. As the water pipe was 75 mm diameter, it was not possible to acquire one of the commonly available domestic or commercial plumbers’ freezing kits, as these only have a capacity up to 50 mm. As time was of the essence, an Internet search discovered a Pipe Freezing Kit for 3” pipe available from the Pipestoppers® Division of Huntingdon Fusion Techniques HFT®.

The HFT® Technical Team were quickly able to reassure us that Qwik-Freezer™ Pipe Freezing Systems were a proven option for this size of pipe and within 24 hours we had a kit in our possession. Installation was easy and CO2 bottles were obtained from the local BOC gas supplier. The freeze worked well, taking around an hour to freeze the pipe. This freeze allowed time to grind out the welded valve, plus a length of pipe, re-weld a flange back onto the pipe at a new position and install a new valve. The job took around two hours to complete in total and at cost of around 25 per cent of a specialist contractor.

Huntingdon Fusion Techniques HFT® have an Exclusive Distributor network, which can be found at: www.huntingdonfusion.com.

A Qwik-Freezer™ video demonstration is available on YouTube: https://youtu.be/k_Vxv4m-SEA

Made in Wales ‘Manufacturer of the Year’ and Welsh Business Awards – Exporter of the Year.

Huntingdon Fusion Techniques HFT® are Weld Purging Innovators, Designers and Manufacturers with offices located globally.

Pipestoppers® is a Division of Huntingdon Fusion Techniques® with an entire range of Mechanical and Inflatable Plugs and Stoppers, and Pipe Freezing Systems and all industries and applications.

Huntingdon Fusion Techniques HFT® together with their US Partner COB Industries distribute Pipe Freezing Equipment throughout the UK and Europe.

www.huntingdonfusion.com

Published in Production
Thursday, 04 June 2020 07:31

Weld Purge Film for a Variety of Pipe Sizes

Low 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.”

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“Our Weld Purge Film is great for when mechanical purging devices cannot be retrieved. The Film, which does not contain water, unlike paper and sponge products do, can be used to create an impermeable barrier, but can be easily washed away after use without leaving any residue.”

The water-soluble Weld Purge Film® allows dams to be cut easily with the safety knife provided and once they are fixed into position using the water-soluble Weld Purge Super Adhesive® provided, produce an impenetrable purge barrier that can easily be washed away during hydrostatic testing of the pipe or just by normal wash-out.

These affordable Kits will save operators high costs by minimising gas usage dramatically reducing purge time and eliminating the need to clean or possibly replace a failed weld. Weld Purge Film® Kits have been designed and developed by HFT®, containing product accessories needed to manufacture dams that will not come loose during welding.

After welding, the water-soluble film is simply washed away and dissolved leaving no trace.

Huntingdon Fusion Techniques HFT® have a worldwide Exclusive Distributor network, which can be found at www.huntingdonfusion.com.

Made in Wales ‘Manufacturer of the Year’ and Welsh Business Awards – Exporter of the Year.

About Huntingdon

Huntingdon Fusion Techniques HFT® are Weld Purging Innovators, Designers and Manufacturers with offices located globally.

Huntingdon Fusion Techniques HFT® invented the ‘Weld Purge Monitor®’ in 1975 and own all international intellectual property rights and registered trademarks.  

Weld purging is the act of removing, from the vicinity of the joint, oxygen, water vapour and any other gases or vapours that might be harmful to a welding joint. Such gases may combine with the metal to form undesirable compounds that may reduce corrosion resistance or may be instrumental in creating cracks or other structural defects in metals.

Published in Production
Wednesday, 01 April 2020 07:55

Weld Purging of Heat-Treated Pipework

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.

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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.

Luke Keane, Technical Sales Manager for HFT® said: “HotPurge® allows the purge to be safely continued for up to 24 hours whilst pre-heating, welding and post weld heat-treating with the purge system remaining in place. Furthermore, the addition of PurgeGate® prevents the risk of dams bursting due to increased pressure.”

“Along with all of our Inflatable Pipe Purging Systems, our HotPurge® Systems are all manufactured in the UK, with scientific knowledge and research invested in each of our products. We do not save on quality. You can be sure to achieve perfect welds, time and time again.”

Once positioned in the pipe and inflated with an inert gas supply, the HotPurge® System seals inside the pipe with inert gas supply displacing the oxygen from within the weld purging zone ready for pre-heating and welding. Each HotPurge® System is manufactured with a Weld Purge Monitor® connection for viewing the oxygen level throughout the welding process.

Each HotPurge® System features PurgeGate®, a revolutionary device to prevent over inflation of, and damage to the inflatable dams. The innovative HotPurge® System also incorporates RootGlo®, a central band for easy positioning inside the pipe, which will illuminate inside the dark pipe for up to 20 hours.

Made in Wales – Manufacturer of the Year and Welsh Busines Awards – Export Business of the Year.

Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.

Published in Production
Thursday, 30 January 2020 21:15

Weld Purging at a Low Cost

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.”

“We manufacture the Plugs in in a number of ready-made kits containing plugs ideally suited for the most popular size of pipes, all of which are available for immediate delivery.”

A Customer recently said: “I have used HFT®’s Weld Purge Plugs and they are very nice. I have operated a lot of Automated Welding Machines with a lot of purging involved. Hands down HFT®’s product is the best I’ve seen.”

Manufactured from engineering quality nylon with rubber seals made of natural black rubber, special Plugs can be made to order with sealing rings made of silicone, viton or nitrile rubbers, making them suitable for use with petrochemical fluids, high temperatures or any other conditions that might arise during use.

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The plugs are supplied with a hollow shaft with an outside ½” BSP thread for screwing on a standard hose connection or solid shaft versions up to 1.5” diameter for pressure testing.

HFT’s Nylon Plugs can be used for many other applications, including garden ponds, pool and spas and on yachts. Other applications include the stopping of pipes to prevent foreign bodies or liquids from entering or gases and liquids from escaping, blocking pipes in order to carry out routine maintenance, repair work and leak testing. As “overnight stoppers” they provide a strong barrier in pipeline activities, to prevent foreign bodies entering the line during downtime.

Made in Wales – Manufacturer of the Year 2019!

Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.

Published in Processing
Thursday, 23 January 2020 07:56

Welding Enclosures for Titanium Parts

Welding titanium alloys often has to be carried out in an environment where oxygen can be eliminated throughout the welding cycle. If the parts were to come into contact with oxygen ay any point, the reactive metal can become contaminated, oxidising which can lead to reductions in corrosion resistance and mechanical strength.

Metal glove boxes, which are still in use today, can be used to provide an inert gas coverage. However these glove boxes are often large, heavy and expensive. Welders are challenged by their lack of flexibility when welding small parts.

Ultra low cost Flexible Welding Enclosures® designed by Huntingdon Fusion Techniques HFT® are easy to use. They are manufactured from an optically clear ultra-violet resistant engineering grade pvc, providing excellent vision and ease of access.

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Luke Keane, Technical Support at HFT® said: “For many years the enormous cost of a metal enclosure prevented all but the major companies taking on work involving the fabrication of zirconium and titanium alloys. To the rescue came HFT® a decade or so ago with the introduction of purpose made Flexible Welding Enclosures®. We now manufacture Standard and Specially Made Enclosures to meet all requirements. There is no job too small.”

The use of Flexible Welding Enclosures® has also increased during development of the Wire Arc Additive Manufacturing process, providing an inert gas shield around the titanium and other reactive alloy components.

Georgia Gascoyne, CEO for HFT® said: “We have built a large number of different shapes and sizes, mostly to customer specification. Each one has its own identity with a variety of glove ports and dimensions. Some can accommodate a complete robot system internally. They are in use worldwide for applications including the aerospace, medical and motorsport sectors.”

“Inert gas such as argon is used to fill the enclosure and expel the air until the oxygen content is below 50 parts per million (ppm). It is essential when producing metallic components from alloys of titanium, zirconium and other reactive materials that the welding zone is purged of oxygen to a level lower than 50 ppm.”

Each Enclosure is manufactured with a connection for a Weld Purge Monitor®, so the oxygen level can be measured at all times. Transfer sleeves also makes it possible to pass small parts in or out of the enclosure without affecting the purge quality.

Made in Wales – Manufacturer of the Year 2019!

Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.

Published in Processing
Wednesday, 18 December 2019 10:26

Purging Large Stainless Steel Pipes

Restricting the volume when welding large stainless steel tube and pipes can save huge amounts of time and inert gas costs.

Previously, welders have spent many hours waiting for oxygen levels to be low enough to start welding.

Leading the way in Weld Purging Innovation and Technology, Huntingdon Fusion Techniques HFT® have designed and developed QuickPurge® Systems to dramatically reduce the space that needs to be purged, for pipes as large as 88” (2,235 mm).

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Ron Sewell, Chairman for HFT® said: “The deflated QuickPurge System is placed inside the pipe and inflated. RootGlo® luminescent positioning strip illuminates the joint position ensuring that the System is positioned in the pipe correctly. The QuickPurge® is then inflated and connected to a Weld Purge Monitor® to measure the exact oxygen level throughout the welding cycle.”

“A 1,400 mm (55 inch) System can be purged down to 100 ppm ready for welding in just 55 minutes. The dramatic savings in time and argon paid for the system in just one weld!”

QuickPurge® has an additional gas input line, which means extra purge gas can be introduced for applications such as this, thereby achieving a much faster purge, down to the lowest oxygen levels, which is perfect for larger diameter pipes where quality welds are required.

High speed pipe purging system QuickPurge® is leading the way in the field of purging tube, pipe and pipeline joints over 150 mm (6 inch) diameter, where oxygen levels are required to be as low as 100 parts per million (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.

Using IntaCal® combined with the integrated PurgeGate® device makes it possible to safely inflate the dams with inert gas, for purging the space between the dams where the weld joint is located. With PurgeGate®, burst dams are prevented in the event of undue pressure increase or accidental flow increase of the purging gas.

Materials used in the manufacture of QuickPurge® are such that they are resistant to the higher weld temperatures present and they don't outgas, preventing weld contamination.

For pre-heated chrome steel and high strength stainless steel pipe joints, HFT® design and manufactures the HotPurge® range for a higher and longer temperature exposure.

Huntingdon Fusion Techniques HFT® have a worldwide Exclusive Distributor network. Please visit www.huntingdonfusion.com.

Made in Wales – Manufacturer of the Year 2019!

Huntingdon Fusion Techniques HFT® are Weld Purging Innovators, Designers and Manufacturers with offices located globally.

Huntingdon Fusion Techniques HFT® invented the ‘Weld Purge Monitor®’ in 1975 and own all international intellectual property rights and registered trademarks.  

Weld purging is the act of removing, from the vicinity of the joint, oxygen, water vapour and any other gases or vapours that might be harmful to a welding joint. Such gases may combine with the metal to form undesirable compounds that may reduce corrosion resistance or may be instrumental in creating cracks or other structural defects in metals.

Published in Processing
Wednesday, 04 December 2019 10:11

Argon regulator for pipe purging systems

Dramatic savings can be achieved when welding stainless and chromium steels and also titanium alloy tube and pipes with the use of an Inflatable Pipe Purging System.

By restricting weld purging zones, Inflatable Pipe Purging Systems achieve a huge saving in time waiting for pipes to be completely filled with argon, purged down to a low enough oxygen level to start welding safely and also the cost of using a large amount of inert gas.

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To avoid such risks and to see that the inert gas being delivered to the pipe purging system is controlled, Huntingdon Fusion Techniques HFT® have designed and developed PurgeGate®, a unique valve which regulates the pressure and flow of gas that is passed through the system, ensuring that it will not burst regardless of the pressure and flow rate.

Ron Sewell, Chairman for HFT® said: “Purging larger diameter pipes has never been easier. PurgeGate® has found valuable applications in the welding industry where inflatable devices are used for weld purging of tubes and pipes. Setting flow rates and pressures on gas regulators can be interfered with. The pressure inside a purge system can also rise dramatically during a welding sequence, to create a burst. If inflatable devices burst during a tube or pipe weld sequence then the loss of protective gas can result in a highly expensive and extremely inconvenient weld repair.”

PurgeGate® is a low cost, reusable accessory that has been designed and constructed to pass a maximum of 7.5 litres/min and 0.5 bar pressure. Other versions of 1 bar and above are also available.

PurgeGate® is fitted as standard on HFT®’s QuickPurge® and HotPurge® Tube, Pipe and Pipeline Weld Purging Systems and is an optional extra for their lower cost PurgElite® series. PurgeGate® is designed to fit on all brands of Pipe Purging Systems and the valve can easily be moved from system to system.

Made in Wales – Manufacturer of the Year 2019!

Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.

Published in Production
Thursday, 24 October 2019 07:36

Heavy-Duty Pipe Blocking with Steel Plugs

Heavy-duty pipe blocking and stopping is easy with the Steel Plugs Range from Pipestoppers®.

Pipestoppers®, a division of Huntingdon Fusion Techniques HFT®, manufacture Steel Plugs, which have been the favoured heavy-duty plug for applications such as leak testing, pipe stopping and blocking for their sealing effectiveness and durability.

HFT Pipestoppers® Steel Plugs can be used for low pressure testing and plugging all pipes, pipelines and pipe work between 2 to 48” (50 to 1,200 mm) diameter.

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Luke Keane, Technical Sales Manager for HFT® said: “Plugging challenges are a thing of the past with our Steel Plugs range. They provide a strong, leak-free seal with each plug having a long life span.”

“Where plugs might be required to work close to the top of their pressure range and to hold seals longer than would be the case with single plugs, we also manufacture Double Steel Plugs, which increases the capability of the plug.”

Specifically designed for heavier duty applications, the Steel Plugs can be immersed in water for long periods of time, can be used at higher temperatures and can be used in acidic or alkaline environments.

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The HFT® Single and Double Steel Plugs are available with sealing rings made from viton, silicone, neoprene, nitrile or natural rubbers for resistance to different temperatures and chemicals.

The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® supplies a range of Mechanical and Inflatable Pipestoppers® and Plugs to suit every application.

Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.

More information

Published in Production
Sunday, 08 September 2019 14:13

Oxygen Monitor for Welding

Inert gas welding requires the elimination of oxygen from the weld zone during the welding of reactive metals including stainless steel.

2019 09 08 160752Before the welding process begins, the oxygen level must be reduced to a required minimum, which is less than 100 ppm when welding stainless steel.

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

The PurgEye® 100 is IP65 rated and comes with long life sensor, leak-tight push buttons, auto calibration and a vacuum-sealed leak-tight probe assembly. The monitor has a clear, easy to read LCD screen with features such as a low battery icon as well as the low sensor icon. When the monitor is not in use, an automatic sleep mode activates to conserve battery life.

2019 09 08 160815The Weld Purge Monitor® was invented by HFT® in the 1970s and with over 40 years of innovation, design and manufacturing experience, the company now has a Family of PurgEye® Weld Purge Monitors® to measure oxygen levels from atmospheric content (20.94%) down to 1 ppm (accurate to 10 ppm).

Ron Sewell, Chairman for HFT® said: “All of Huntingdon Fusion Techniques HFT®’s Weld Purge Monitors® and Inflatable Tube, Pipe and Pipeline Weld Purging Systems are manufactured in the UK. We do not sacrifice on quality. We guarantee to help you achieve zero colour welds, time and time again.”

It is important not to use alternative low cost oxygen analyzers or other oxygen safety monitors as they are calibrated under ambient conditions and therefore unsuitable for measuring purge levels down to 0.01% as the PurgEye® 100 does.

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Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor Network.

More information

Published in Production
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