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Displaying items by tag: Huntingdon

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
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
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
Wednesday, 25 September 2019 08:15

Low Cost Weld Purge Dams

Weld Purging short pipe pieces and dome-end welds where tandem Inflatable Tube and Pipe Purging Systems are unsuitable, Huntingdon Fusion Techniques HFT® manufactures Weld Purge Dams.

Ron Sewell, Chairman for HFT® said: “When welding tubes and pipes, the most cost- effective solution is to restrict the volume, usually with a Tandem Weld Purging System, especially welding metals such as stainless steels, titanium and zirconium.”

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“Where Tandem Weld Purging Systems are unsuitable, Weld Purge Dams are available for pipe diameters from 6 to 88” (150 mm up to 2,235 mm) and offer a low-cost alternative to foam or cardboard dams that are still frequently handmade by welders on site. Unsuitable materials can often lead to rework of some kind and in worst cases cause welds to be rejected. Displacing the oxygen with an inert gas before, during and after welding helps to create welds that are free from oxidation. However the Weld Purge Dams should be made of materials that do not outgas water vapour or any other undesirable gases.”

Weld Purge Dams are manufactured with four pull tags located around the circumference, thus providing ease of positioning and retrieval. They are fitted with a dual inflation and purge hose, an additional purge gas hose and an exhaust vent which can be connected to one of the HFT® Weld Purge Monitors®. The additional purge gas hose is suitable for introducing extra purge gas into the weld zone at any time to cool welds, to meet interpass temperature specifications, or to provide more inert gas in the event of titanium, zirconium or special stainless applications needing a guaranteed zero colour weld.

Apart from the benefit of having a metallurgically sound weld, the difficulties of cleaning an oxidised weld are eliminated, saving vast amounts of money in labour and material costs as well as the disposal costs when pickling acids are used. Now there is no more reason to put welds at risk by using cheaper unsuitable materials, when for a very low cost Argweld® Inflatable Weld Purge Dams can be purchased instead!

Huntingdon Fusion Techniques HFT®’s White Paper: Single Ended Purge Dams is available to read on their website: https://www.huntingdonfusion.com/index.php/en_gb/technical-support/white-papers-40017/2868-wp-207-single-ended-purge-dams

Published in Production
Tagged under
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

Thoriated tungsten electrodes are still widely used in GTAW/TIG welding despite the potential health hazards. Thoria is added primarily to stabilize the arc but it is radio-toxic and radio-toxic dust is generated during electrode grinding.

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To overcome the risk posed by harmful products Huntingdon Fusion Techniques HFT®’s blue-tipped MultiStrike® Tungsten Electrodes contain a mix of rare earth stabilizing compounds without thoria and are thus radio-toxic free. They also offer a life extension of up to ten times that of other stabilized electrodes.

Each packet comes with a traceability number to ensure that companies with a quality control procedure have traceability over another aspect of their joining processes.

MultiStrikes® can be used for welding aluminium with the AC process, as well as steels and alloys with the DC process, which allows the welder to have just one type of Tungsten Electrode to weld all materials and reduce the amount of stock and purchasing requisitions.

MultiStrike® Tungsten Electrodes demonstration video is available on our YouTube Channel.

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

More information

Published in Production
Tagged under

A south-west Wales manufacturer is on track to secure a game-changing £1 million export deal in Central Asia which is set to propel its business growth.

Huntingdon Fusion Techniques (HFT), based in Burry Port, Carmarthenshire, is a leading inventor, designer and manufacturer of weld purging technology designed to remove oxygen from welds on pipes and tubes made of stainless steel or similar materials to prevent their oxidisation, discolouration or corrosion. The process improves corrosion resistance and protects the joint strength of the pipes and tubes.

The firm, a former finalist in the Welsh Business Awards’ ‘Success in Overseas Trade’ category, is close to securing a £1 million deal which will see its products used in a multi-billion-pound project to build a new, onshore gas facility in the oil and gas rich country of Kazakhstan.

Georgia Gascoyne, CEO of weld purging technology manufacturerGeorgia Gascoyne, CEO of weld purging technology manufacturer

The deal would mean the creation of additional jobs and a possible need for additional warehousing.

The project is the latest in a line of export contracts for the manufacturer which exports its products to more than 45 countries across the globe.

Georgia Gascoyne, CEO and Managing Director of HFT since 2013, said: “Over the last 10 years we’ve experienced significant growth due to the ease of exporting. Some 80% of our business is export now and this deal in Kazakhstan will provide a major boost for us.

“It’s an international project, backed by US oil companies, with many contractors working on it. We’ve been making presentations in regard to this project for three to four years but we’re expecting to hear a final decision in the next couple of months. It’s a game-changer for us in terms of manufacturing and administration.

“It will bring a number of employment opportunities including potential roles for a project manager and assistant and maybe even two or three manufacturing positions.”

Established in 1975 in Cambridgeshire before moving to Wales 15 years ago, HFT deals mainly with the oil and gas, nuclear energy, shipbuilding and process industries. The company sells its products through a network of international distributors and currently has 40 distributors worldwide in markets such as Australia, North and South America, the Middle East and Europe.

Support from the Welsh Government has been key to HFT’s export growth, helping the firm to secure its attendance at trade exhibitions which have led to contracts being secured in Turkey and Japan within the last 12 months.

Georgia explained: “Our turnover has been up 6% to 8% a year for the last five years thanks to our export focus. We’ve recently established a new operative in Turkey through trade exhibitions in the country and have entered markets in Japan thanks to a Welsh Government trade mission we attended in October 2018, where we picked up orders straightaway.

“Japan was a market we had dabbled in previously, with a couple of customers there but we wanted to expand our activities there. When the opportunity arose to travel to the country last year with Welsh Government, on an arranged trip surrounded by industry peers, it made sense. The trip was a great success and we’re returning to Japan in the next couple of months.

“Japan is a difficult market to crack but we seem to have broken into it. We have more work to do but we’re on the second rung of the ladder.”

Published in Processing
Wednesday, 24 January 2018 06:35

Bright, shiny, oxide-free welds with PurgExtra®

Tubes and pipes made from titanium, stainless steel, chrome/nickel steels are mostly required to be welded in a non-oxidised environment in order to achieve a metallurgically correct, zero colour weld. Best results are obtained by reducing the volume to be purged, with an inflatable Weld Purging System.

Leading the way in Weld Purging Technology, Huntingdon Fusion Techniques HFT® have developed PurgExtra®, for purging tube and pipe joints from 1 – 24” diameter that provide an extra gas purge hose to speed up the purging process even further.

Additional advantages of this design improvement are that the operator can use the extra purge gas supply for welding reactive metal joints in particular, such as those made from titanium and zirconium. In addition, the extra gas can be used for cooling welded joints faster than normal, where permissible.

PurgExtra APBM PHO 3C PurgExtra with Helmet Torch

Luke Keane, Technical Support for HFT® said: “The PurgExtra® Range complements the PurgElite® Series that has a single purging inlet and is more appropriate for stainless steel only. PurgExtra® however, allows the operator to purge at the recommended rates initially and then, when conditions are correct, to introduce the additional gas at high flow rates. This system is especially valuable for achieving the lower oxygen levels required for welding materials around 20 parts per million.”

When welding joints where interpass temperature control is necessary, PurgExtra® allows extra argon gas into the welding zone, helping to cool the weld zone dramatically.  The extra gas also helps to remove the gases that are expelled by the outgassing, which occurs as the metal is being heated. The extra gas flow will prevent these expelled gases from combining with the hot metal and oxidising, which would otherwise cause the metal to discolour and lose its corrosion resistance and possibly introduce defects that would cause loss of joint integrity.

PurgExtra® comprises two inflatable dams connected by a heat resistant, highly flexible gas hose that has the unique IntaCal® gas release system. IntaCal® allows the dams to be inflated correctly and then releases the inert gas to safely purge the space between the dams. The low profile IntaCal® Valve replaces the old fashioned, bulky complicated valves and eliminates the need to make adjustments to flow rates.

The highly flexible spinal hose between the inflatable dams allows the PurgExtra® Systems to be pulled or pushed easily around bends and elbows. In the centre of the spinal hose a strip of RootGlo® material is adhered, allowing the welder to see clearly through the root gap, when the system has reached the correct position in the pipe. RootGlo® can be charged by exposing it to daylight for 10 minutes, after which it will provide up to 24 hours of bright illumination inside the pipe.

The innovative PurgeGate® Valve may be fitted to the PurgExtra® Systems as an accessory, to protect the inflatable dams from bursting due to accidental over pressurisation.

Heat Resistant Covers are also available for PurgExtra®, which fit onto the inflatable dams and allow operation with pre-heated and post-weld heat-treated pipe joints where the temperatures might reach 760°C.

The HFT® Weld Purge Monitors® are used to give precise oxygen values throughout the purging process.

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 Equipment
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