Sunday, 08 September 2019 16:13

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.

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Published inProduction

Pipe blocking and stopping pipes containing hydrocarbons such as petroleum products and natural gas can often pose challenges, with normal Pipestoppers unable to withstand such intense conditions.

The Pipestoppers® Division of Huntingdon Fusion Techniques HFT® manufacture a range of hydrocarbon resistant stoppers called PetroChem® Stoppers. Manufactured from a high-grade latex, the PetroChem® Stoppers offer a rubber internal inflatable bag covered with a petrochemical resistant layer, which has a tough, woven impregnated nylon outer cover, capable of withstanding temperatures up to 80ºC (176ºF).

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Ron Sewell, Chairman for HF® said: “Inflatable Stoppers are often used for various applications such as debris stopping, leak testing, low-pressure hydrostatic tests, blocking the release of hydrocarbon gases and a variety of plumbing operations.”

“The Pipestoppers® 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. In machining applications, they can be inserted below a horizontal flange on a vertical pipe, to prevent machining fluid, swarf and tools from falling into expensive machinery such as pumps and heat exchangers etc.”

The standard range of PetroChem® Stoppers are manufactured in cylindrical and spherical formats from 1 – 44” (25 – 1,118 mm) in diameter.

Inflatable Stoppers are particularly useful when one or more can be inserted into a small opening close to a work location, rather than at the end of the pipe, tank or vessel. No high-pressure equipment is needed for inflation.

PetroChem® Stoppers are also available with optional Heat Resistant Covers to protect them against high temperatures of up to 300ºC (572ºF), ensuring the Stopper is not damaged when exposed to high temperatures. Inflatable Stoppers weigh much less than most of their counterpart sizes of mechanical plugs, making them easier to transport and safer to use at height.

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

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Published inProduction

Weld Purging Techniques are now used in most industries especially when welding reactive metals. Whilst the welding torch provides a protective cover to the top of the fusion zone, inert gas coverage is also required at the weld root.

By sampling the gas and testing the oxygen content around the weld, the welder knows when to start welding for safe results.

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The basic-entry level Weld Purge Monitor®, called the PurgEye® Nano, designed and developed by Weld Purging Experts Huntingdon Fusion Techniques HFT®, will show oxygen levels down to 1 ppm (accurate to 10 ppm), which can be used to monitor the oxygen content when welding titanium, zirconium and all other reactive metals. 

Luke Keane, Technical Sales Manager for HFT® said: “Our low cost PurgEye® Nano is a no frills monitor, perfect for those with restricted budgets. The Monitor is small, lightweight and easy to use.”

The PurgEye® Nano has been developed for weld purging where data logging, alarms and machine control are not necessarily required. The monitor has been developed with a unique long life sensor that has a warm up time under 60 seconds.

With leak-tight connectors for weld purge hoses, the PurgEye® Nano can be used with optional accessory hand pump and gas sampling probe. It can be used to check purge gas quality from the main source and at the exhaust end of a purging system, as well as to find air leaks in purging hose connections anywhere in a system. The monitor can also be used to check the quality of the gas source to ensure that no contamination is present.

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HFT® has a Family Range of PurgEye® Weld Purge Monitors® for every application. The range includes hand held, battery operated monitors and mains powered monitors, which can read oxygen levels from atmospheric level of 20.94%, right down to 1 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 as well as our inflatable welding enclosures are manufactured in the UK. We do not sacrifice on quality. We guarantee to help welders achieve zero colour welds, time and time again.”

As the major international authority on weld purging, Huntingdon Fusion Techniques HFT® provide a very comprehensive technical support system and in addition, they have a Worldwide Exclusive Distributor network which can be found at www.huntingdonfusion.com 

Published inProduction

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 inProcessing

There are occasions where pipes need to be repaired whilst liquids are still flowing.

Heavy-duty flow stopping and line plugging may require plugs and stoppers to have long immersion in chemicals or exposure to high temperatures, which many such items are not capable of withstanding.

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Providing the user with the opportunity to isolate a section of pipeline whilst essential repair work can be carried out, the Pipestoppers® Division manufacture a range of single Steel Plugs, which are ideal for more arduous duties and also available as double versions for even tougher applications involving higher pressures. 

Luke Keane for HFT® said: “Our line stopping products are regarded as one of the most effective and cost saving methods of pipe isolation. Often, stopping the flow in a heavy-duty operation can be difficult. Our range of Steel Plugs is specifically designed for heavier duty applications such as long immersion in water, for use at higher temperatures or for contact with acidic or alkaline environments for which other Plugs are not suitable.”

“The Steel Plugs can be used for low pressure testing as well as plugging pipes, pipelines and pipework fabrications and other orifices between 2 and 48” (50 to 1,200 mm) diameter.”

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

www.huntingdonfusion.com

Published inProduction

Tungsten Electrode Grinders are essential with TIG/GTA welding. Using a Grinder that has been designed and manufactured specifically for tungsten metal is not only a much safer option, they provide more accurate results leading to as many as ten times greater number of arc strikes and giving very directional arcs without flicker or wander.

The Tungsten Electrode is one of the most important variables involved in TIG welding. Preparing your Tungsten Electrode correctly will help to improve arc starting, arc stability and consequently weld quality.

Huntingdon Fusion Techniques HFT® now manufacture the TEG-1000 Tungsten Electrode Grinder with a diamond wheel, producing smooth, perfect surface finishes that eliminate arc jumping leading to consistent welds.

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Ron Sewell, Chairman for HFT® said: “Many welders today are using belt sanders or bench grinders both of which are unsuitable. Bench sanders and grinders are used for a wide selection of materials and are therefore likely to contaminate the tungsten with unwanted material, which in turn will risk a negative influence on the welded joint.”

“Sanders and bench grinders are not designed for tungsten grinding, so they can cause danger to the operators. They are also rarely able to provide the type of finish to a tungsten electrode tip as the TEG-1000 does with its diamond wheel.”

“An incorrectly ground Tungsten Electrode tip may drop into the weld pool and create a tungsten inclusion that could lead to a weld cut-out or reject, either way, leading to additional welding costs and lost time. It can also result in a huge reduction in tip life and changes in arc voltage.”

The use of the TEG-1000 Grinder will give repeatable Tungsten Electrode points every time, enabling consistent arc performance and welding results. Sizes 1.0 to 3.2 mm can be ground as standard, with other sizes catered for on request.”

Savings can be achieved because of the increased life of properly ground Tungsten Electrodes. With the special collet accessory, shorter Tungsten Electrodes can be held, significantly increasing the lifetime of each Tungsten Electrode before it is discarded.

TIG welding requires Tungsten Electrodes to have perfectly ground and polished tips. HFT®’s TEG-1000 provides these, time after time, to exactly the same size and shape.

The design of the TEG-1000 is such, that the diamond wheel grinds the Tungsten Electrodes longitudinally, preventing arc flicker or wander caused by circumferential lines or ridges found on electrodes, which have been ground incorrectly.

With Tungsten Electrodes ground and polished, mechanised welding can produce identical results every time. With manual welding, the shape of the Tungsten Electrode is just as important. With a correctly shaped tip, the arc can be precisely positioned with none of the preferential arcing experienced when using poorly shaped manually ground tips.

HFT® also manufacture MultiStrike® Tungsten Electrodes that are designed to address the growing concerns about the radio-toxic thoria that is present in standard red tipped Tungsten Electrodes. MultiStrike® Tungsten Electrodes are non-radiotoxic, non-thoriated, non-carcinogenic. They will also strike 10 times more arcs than red tipped thoriated tungsten, when tested under identical conditions. Eliminate the thoriated dust in the atmosphere by changing to MultiStrike® Tungstens so that when there is tungsten grinding dust, it is not radiotoxic.

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

Published inEquipment

Measuring the oxygen level with a Weld Purge Monitor® before, during and after welding stainless steel is crucial to achieve oxide free, zero colour welds that are metallurgically sound. It is important not to use “oxygen analyzers” or “oxygen safety monitors” as they are calibrated for accuracy only at ambient conditions.

The low cost, hand held, battery operated PurgEye® 100, designed and developed by Huntingdon Fusion Techniques HFT® is perfect for welding stainless steel, reading accurately from atmospheric oxygen level (20.94%), right down to 100 parts per million (ppm) of oxygen

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Ron Sewell, Chairman for HFT® said: “We are extremely proud of the PurgEye® 100, our Flagship Product. This monitor is specifically designed for weld purging and is available at a competitive price, so that it will pay for itself in just a few welds.

The PurgEye® 100 is IP65 rated and comes with leak-tight push buttons, auto calibration features, vacuum-sealed leak-tight probe assembly, wrist/neck strap and tripod mount.

The extra long life sensor provides approximately 18 months life before it requires changing. A low sensor indicator will appear on the screen, warning that a new sensor is required. Once that icon appears, it provides the user with adequate time to obtain a new sensor, which can be fitted like changing a battery and the monitor can be re-calibrated easily by the user.

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With a clear, easy to read LCD screen, the PurgEye® 100 boasts a 24 mm high display 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.

The Weld Purge Monitor® was invented by HFT® in the 1970’s 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).

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

Published inProduction

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 inProcessing
Wednesday, 22 November 2017 07:23

Handy oxygen measuring Instruments for welders.

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Welders need to measure oxygen near the weld when they are joining metals like titanium, stainless, chrome and duplex steels.

A fast and reliable way to do this, is to use a hand held monitor near the joint to ‘sniff’ samples of the gas and to check the amount of oxygen present.

Ordinary oxygen monitors are not suitable for use in this application, because they are calibrated to be accurate at atmospheric pressure for health and safety purposes, so special oxygen monitors are available that are calibrated to be accurate at 100 ppm of oxygen, which is a suitable value to guide those welding stainless steel and 10 ppm which is an excellent value for the welding of titanium.

Using these  two instruments, known as the “PurgEye® 100 and the PurgEye® 200 operators have easy to use monitors that can be carried with them in all situations, so that they can guarantee to produce a perfect, non oxidized, no colour weld

 A customer recently said: “The PurgEye® 100 is one of the best, if not the best residual oxygen detector instruments on the market today. With its digital residual oxygen level LCD screen readouts measuring as low as 100 ppm and its large user friendly viewing screen making it easier for me to read. The PurgEye® 100 also has a great accuracy of residual oxygen, with speedy measurement's being displayed within seconds.”

Both of these instruments are IP65 rated and have leak-tight push buttons, auto calibration features, vacuum-sealed leak-tight probe assembly and wrist/neck straps

The extra long life sensors allow these instruments to operated for several years without attention although calibration documents and service can be carried out by the manufacture on a yearly basis if required.

As already quoted, the PurgEye® 100 has a clear, easy to read LCD screen, with a 24 mm high display. The display also shows a low battery icon. When the monitor is not in use, an automatic sleep mode activates to conserve battery life.

The PurgEye® 200 has extra facilities with, in particular a PurgeNet™ connection that allows it to join up with a humidity monitor for measuring water vapour present  at the same time.

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 inEquipment

Tungsten is a rare metallic element used for manufacturing gas tungsten arc welding (GTAW) electrodes. Tungsten Electrodes are available in a range of sizes and lengths and are made up of either pure tungsten or an alloy of tungsten and other rare-earth elements and oxides. Choosing an electrode depends on the base material type and thickness and whether you weld with alternating current (AC) or direct current (DC).

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Each electrode is color-coded at the tip to eliminate confusion over its type. Unlike the red-tipped thoriated Tungsten Electrode, which contain 2% thoria, Huntingdon Fusion Techniques HFT®’s blue-tipped MultiStrike® Tungsten Electrodes contain a mix of non-radioactive rare earth elements, eliminating the risk to health posed by thoriated Tungsten Electrodes.

A customer in the UK recently said: "We have tested your MultiStrike® under production conditions where we need to make short lengths welds using the TIG process. On a batch of 50 components only 2 light re-grinds were required compared to 7 heavy regrinds when using thoriated electrodes. Even when the welder occasionally touched the work with the electrode there was no material change in performance whereas we would normally expect to have to re-grind. Better weld quality and finish was observed. We were particularly impressed with the health and safety aspects and have taken the decision to remove all thoriated electrodes from site."

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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 stocks and purchasing requisitions.

Other tungsten electrodes work at higher temperatures so their oxide additions (mostly radioactive) burn out, or evaporate much faster than those non-radioactive ingredients in MultiStrike®, so much so that they give at least 10 times more arc striking capacity of other tungsten electrodes, when tested under the same conditions.

With most tungsten electrodes in use still containing radioactive and carcinogenic 2% thorium oxide, MultiStrike® provide the TIG and Plasma welder with a safe and superior alternative.

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.

MultiStrike® Tungsten Electrodes demonstration video is available at: https://youtu.be/bx1BeepVMaw

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

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

Published inProcessing
Friday, 03 March 2017 08:07

Rapid Purge your Pipes with QuickPurge®

Weld Purging is the act of removing oxygen within the vicinity of a joint when welding, especially when joining metals such as stainless steel, nickel alloys, titanium, zirconium etc. However, completely filling tubes and pipes with expensive inert gas such as argon for weld purging is time consuming.

2017-03-03 080704Such costly time loss and excessive waste of argon gas can be avoided now because of QuickPurge® Tube, Pipe and Pipeline Weld Purging Systems designed and manufactured by weld purging specialists and developers, Huntingdon Fusion Techniques HFT®.

Whatever the size of pipe, QuickPurge® Systems reduce waiting times so dramatically that they pay for themselves in less than one weld. QuickPurge® is simply inserted into a tube or pipe, inflated within the pipe, restricting the area that is to be welded and removing the oxygen within minutes.

For example, a 36” diameter stainless steel pipe can be purged down to 100 parts per million (ppm) of oxygen in under 32 minutes. Comparing this with weld purging using foam dams or other home-made devices that will outgas heavily into the welding zone, taking many hours.

Some features of QuickPurge® Systems include:

  • An additional gas input line, allowing extra purge gas to be introduced for extra high speed purging down to the lowest oxygen levels, which is perfect for larger diameter pipes where quality welds are required. This extra cold argon gas input is perfect for mitigating the extra heat produced by the Plasma / TIG process.
  • The advanced design of the QuickPurge® System means that oxygen levels as low as 10 parts per million (ppm) can be reached every time, allowing zero colour welds to be achieved with no loss of corrosion resistance caused by oxidation.
  • IntaCal®combined with the integrated PurgeGate®device makes it possible to safely inflate the systems with argon gas, for sealing and then purging the space between the dams where the weld joint is located. With PurgeGate®, any risk of over inflation is due to pressure or flow increase is eliminated.
  • All systems are manufactured as standard with a hose for connecting a Weld Purge Monitor®, which can read oxygen levels down to as low as 1 ppm (accurate to 10 ppm).
  • Materials used in the manufacture of QuickPurge® are such that they are resistant to the higher weld temperatures present and they don't outgas, thus preventing weld contamination.

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

QuickPurge® Demonstration Video is available on YouTube at: https://youtu.be/Q4MJTssaxN0

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 inProcessing
Thursday, 29 December 2016 10:00

We Have The Key to Your Perfect Weld Purge

A unique Weld Purge Monitor® has been designed and developed that reads from atmospheric level of oxygen (20.94%), down to one part per million (0.0001%), breaking all technological boundaries in one instrument.

Huntingdon Fusion Techniques Limited HFT® continues to grow its innovation of Weld Purge Monitors® / oxygen analysers that were first invented and manufactured by the company over 40 years ago.

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CEO for HFT®, Georgia Gascoyne said: “The PurgEye® 600 incorporates the features and benefits of all the other Weld Purge Monitor® designs in the HFT® Family Range, but for the first time, this one instrument has a full range of measurement reading from atmospheric concentration (20.94%), down to 1 ppm, accurate to 10 ppm. Readings are indicated either as parts per million or in percentage.”

Using ground breaking technology, the PurgEye® 600 has a life time sensor that won’t need replacing or recalibrating. This high level, advanced instrument has been designed with a large, full colour touch screen (3.2"/ 81 mm) and on-screen graph displaying the oxygen levels during the welding process.

USB data logging capability allows the operator the ease of data transfer without the need for a computer connection. These stable, accurate results can be logged for each weld, using the PurgeLog™ Software.

Not only has HFT® been able to achieve these features, they have also included an internal sampling pump with gas filtration, which means there is no requirement for an external hand pump.

Quick fit / disconnect, leak tight fittings are manufactured as standard on the PurgEye® 600. In addition, control alarms will activate in the event of rising or falling oxygen level, which can be pre-set by the user.

The PurgEye® 600 Weld Purge Monitor® is ideal for industries such as aerospace, pharmaceutical, semi-conductor, cryogenics, specialist gas manufacture and food and beverage, as well as many others where oxide free, zero colour welds have to be achieved and where traceability is a major advantage for the requirements of high-end Quality Control systems.

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

Published inProduction

Blocking pipes in order to carry out routine maintenance, repair work or even for weld purging is easy with Pipestoppers®.

The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® design and manufacture a range of Mechanical and Inflatable Pipestoppers® and Plugs to suit every application. Their newest addition to the Inflatable Pipestoppers® Range is the Pancake Stopper, for applications where insufficient length of pipe is available for the regular Cylindrical or Spherical Stopper.

Ron Sewell, Chairman at HFT® said: “With their low profile, the Pancake Stopper can fit into a pipe end that may be directly on an elbow or just inside a flanged neck on a casting. Other applications include blocking pipe ends to keep gases inside or to keep debris and vermin out.

When used in a vertical mode, these Pancake Stoppers have already been used to prevent machine swarf or tools from falling into pipes, into an unrecoverable and dangerous situation, in a nuclear power steam turbine.”

Manufactured from tough, robust fabric, these new Pancake Stoppers are available in sizes 6 to 96” (150 to 2,440 mm) and provide excellent grip inside the pipe, with an effective airtight seal.

Each Pancake Stopper is fitted with a standard Schrader Valve connected to a 1.2m hose, is easy to inflate using a foot pump or compressor and is heat resistant up to 90oC (194oF).

Pancake-Stopper-PSIP-PHO-02W-NL-NB

The Pipestoppers® Inflatable Stoppers Range comprises:

•    Cylindrical and Spherical Stoppers: an easy way to stop the flow of gas or liquid inside pipes and ducts. Available up to 96” ø (2,440 mm). For higher temperatures, these Inflatable Stoppers can also be manufactured with a Heat Resistant Cover for temperatures up to 300oC (572oF).
•    PetroChem™ Stoppers: manufactured from high-grade latex, they are used for stopping off pipes with hydrocarbon gases and liquids inside.
•    Inflatable Rubber Plugs: a wide diameter range and are tough, durable, can withstand chemicals and hydrocarbons, for higher-pressure applications, with a long life.

The Pipestoppers® Division also manufactures a range of Mechanical Stoppers and Plugs for industrial and domestic plumbing operations, water drainage systems as well as offshore operations. These Mechanical Stoppers are negatively buoyant for sub-sea work and can be used in all kinds of pipes and other vessels where there are orifices to be sealed or blocked.

The Pipestoppers™ Division of HFT® also provide Pipe Freezing Systems that make ice plugs inside pipes, to stop the flow of liquids so that maintenance can be carried out on valves, etc. This technique avoids the draining of a complete pipe system that might have an expensive product inside, ranging from heated water to expensive petrochemical fluids. Freezing can be carried out remotely, which is excellent for nuclear service personnel.

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

Published inEquipment
Monday, 29 February 2016 20:14

QuickPurge® Your Pipes for Perfect Welds

Time is money! Waiting for pipes to be purged ready for welding can take many hours, depending on the diameter of the pipe being welded and the method chosen for purging.

Huntingdon Fusion Techniques HFT® design and manufacture a range of QuickPurge® Inflatable Pipe Purging Systems which reduces waiting times so dramatically that they pay for themselves in less than one weld.

The company was recently tasked with a special project in the USA, where pipes with 90o elbows, up to 54” ø were required to be purged.

Georgia Gascoyne, CEO at HFT® said: “We manufactured QuickPurge® Systems with longer sleeves so that they could easily be pulled around the sharp bends in the pipework.

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The welders were previously spending half a day purging the pipe, which was costing a considerable amount in time and gas costs. With the help of the QuickPurge® the pipe was purged in just 55 minutes.

The dramatic savings in time and gas 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 6” 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 argon 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.

All systems are manufactured as standard with a hose for connecting a Weld Purge Monitor® to, which can read oxygen levels down to as low as 10 ppm depending on the model.

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

Published inProduction

Freeze sealing pipes for repair or maintenance is an increasingly popular alternative to ‘hot-tapping’ and eliminates the need to shut 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.

The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® manufactures Qwik-Freezer™, the industry standard portable CO2 Pipe Freezing System. With thousands of kits in use around the world for over 40 years, Qwik-Freezer™ covers pipe diameters from 3/8” – 8” (9 – 200 mm).

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Qwik-Freezer™ is very quick and easy to use, requires almost no set-up time and is the only CO2 Pipe Freezing System capable of freezing up to 8” pipe. Even for smaller diameter freezes, Qwik-Freezer™ produces ice plugs that are significantly more reliable and robust, capable of withstanding far more pressure than the smaller plugs that other types of systems will produce.

Georgia Gascoyne, CEO for Huntingdon Fusion Techniques said: “Qwik-Freezer™ has become the preferred solution for a very wide range of water-carrying pipework, where valves need to be changed, in industry sectors such as: petrochemical, building and maintenance services, food and beverage, hospitals, water treatment, shipping and aerospace.”

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A specially designed flexible jacket is wrapped around the pipe at the point where the freeze is required. A nozzle in the jacket is then coupled to a cylinder of liquid carbon dioxide by means of a high-pressure hose.

When the CO2 is injected into the space between the jacket and the pipe, at a temperature of -78OC, the pipe contents freeze and a secure ‘ice plug’ is formed, which seals the pipe. The ‘ice plug’ forms only in a section of the pipe covered by the jacket, so the resulting rise in pressure is very small and there is no damage to the pipe. The technique can be used safely on iron, lead, stainless steel, copper, brass and plastic pipe.

By not having to drain systems of liquids to make repairs, the savings made are able to justify the low relative cost of the Qwik-Freezer™ System.  

Huntingdon Fusion Techniques HFT® have an Exclusive Distributor network.

For your nearest Exclusive Distributor, please visit www.huntingdonfusion.com

Published inProcessing

When welding titanium, stainless steel and other reactive metal pipework and sheet metalwork, it is important to prevent the welds from oxidising or coming into contact with any air during their welding and cooling periods.

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The use of products called Trailing Shields®, designed and manufactured by Huntingdon Fusion Techniques HFT® ensure the weld stays under a protective argon gas coverage, while the hot weld metal is cooling, preventing it from oxidising on contact with air.

Titanium and stainless steels are chosen for their corrosion resistant properties in particular and if they are then allowed to oxidise during the weld cycle, expensive post welding cleaning techniques become necessary.

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With the use of a simple, low cost accessory called a Trailing Shield®, this oxidation and expensive cleaning process is eliminated.

Georgia Gascoyne, CEO at Huntingdon Fusion Techniques HFT® said: “Our range of Trailing Shields® are available in flat format for sheet metal welding or in curved format for welding circular items like tubes, pipes and tanks. Use of Argweld® Trailing Shields® will allow much faster welding, offering savings in production costs when welding stainless steels and titanium.”

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Trailing Shields® are manufactured for all diameters of tubes, pipes and vessels and they can be fitted to all brands of TIG/GTAW and Plasma welding torches. As well as the shields for manual welding there are longer and wider versions manufactured for automatic welding.

In summary, one simple low cost Trailing Shield® will prevent oxidation, reduce gas costs and eliminate expensive post weld cleaning, giving payback in less than one weld.

For further information, please contact:

Michaela Reay, Marketing Associate,

Huntingdon Fusion Techniques HFT®

01554 836 836 (office)

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Sales: This email address is being protected from spambots. You need JavaScript enabled to view it.

www.huntingdonfusion.com

Huntingdon Fusion Techniques HFT® are Weld Purging Innovators, Designers and Manufacturers with offices located globally.
TIG is tungsten inert gas and is the type of welding generally used for clean material welding.
GTAW is an alternative name for TIG welding often used by the American Welding Industry. It means Gas Tungsten Arc Welding.
PAW/Paw stands for Plasma Arc Welding and is an alternative process to the TIG or GTAW process, for faster welding or thinner materials.
Published inProduction
Monday, 07 December 2015 08:45

We have the key to your perfect weld

Weld Purge Monitors® are an essential instrument to help obtain non-oxidised, zero colour welds by monitoring the oxygen leve­ls when welding metals such as titanium, stainless, duplex and chrome steels as well as zirconium and nickel alloys where a high quality weld is required.

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The Weld Purge Monitor® was invented by HFT® in the 1970’s and with over 40 years of innovation, design and manufacturing experience, the company now has a Family Range of PurgEye® Weld Purge Monitors® to measure oxygen levels from atmospheric content (20.94%) down to 10 ppm (0.001%) at which point no discolouration in welds should occur.

By striving for zero colour welds, companies can eliminate the post-weld cleaning costs, which can be very high and in those cases making the cost of each weld ultra significant.

The Argweld® PurgEye® Family Range of Weld Purge Monitors® comprises:

  • PurgEye® 100 IP65, low cost, dustproof and waterproof hand held unit for reading down to 100 ppm. With innovative push button auto calibration, enlarged screen, low sensor indicator, tripod mount, sleep mode, vacuum sealed leak-tight probe assembly, wrist or neck strap, rubber housing protector and so much more.
  • PurgEye® 200, hand held, rechargeable battery driven Weld Purge Monitor® for reading very accurately down to 10 ppm complete with electromechanical pump. The PurgEye® 200 also has an IP65 rating for its housing that is sealed against the ingress of dust and water.
  • PurgEye® 300 Nano, the worlds first and only super low cost, entry level, mains power driven Weld Purge Monitor® measuring accurately down to 10 ppm.
  • PurgEye® 300, small, lightweight and inexpensive with switching capabilities at high and low oxygen for alarms or welding power supplies. This monitor comes complete with software for recording purging results for evaluation and provision of a quality control document.
  • PurgEye® 500 that uses an internal electro-mechanical pump to draw the gas across the sensor. It also has the switching capabilities and the PurgeLog™ software as per the 300 model above. This equally attractively priced instrument includes a unique, fast response, lifespan sensor with virtually no maintenance required.
  • PurgEye® 600, a computerised, touch screen model measuring very accurately from atmospheric level of oxygen, down to 10 ppm, with high and low oxygen level switching capabilities, data capture via USB using PurgeLog™ software for recording purging results for evaluation and provision of a quality control document. Readings are indicated either as parts per million or in percentage.
  • PurgEye® 1000 monitor has been developed for those instances where the measuring point is more than 20 metres away from the monitor. The very slow time for the gas to travel and reach the sensor and the contamination of actual reading that can take place inside the gas tube, leads to serious delays and erratic readings. To improve this, the sensor is placed in a small module attached to a weld purge system and the reading transmitted instantaneously to a hand held display via a data cable.

The PurgEye® Weld Purge Monitor® is ideal for industries such as aerospace, pharmaceutical and food and drink, as well as many others where oxide free, zero colour welds have to be achieved and where traceability is a major advantage for the requirements of high-end Quality Control systems.

For more information, please contact:

Sales: This email address is being protected from spambots. You need JavaScript enabled to view it.

www.huntingdonfusion.com 

Published inProduction

Chrome steel pipe joints, such as those used in the power industry for high pressure, high strength pipework, need to be pre-heated for welding and also require a post weld heat treatment too.

Weld joints of this nature need to be purged of oxygen and welded in an inert atmosphere, to prevent oxidation that leads to loss of corrosion resistance and undesirable change to the metallurgy.

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With the high temperatures and length of time at such temperatures, most weld purging systems are unsuitable. However, Huntingdon Fusion Techniques HFT® has now developed the HotPurge™ Inflatable Tube and Pipe Purging System for Heat-Treated Chrome Steel Pipe Joints where the temperatures might be as high as 760OC.

Using HotPurge™ Systems 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.

Each HotPurge™ is manufactured as standard with PurgeGate® to prevent over inflation of the dams. No matter how high the user raises the pressure in order to deliver more gas flow, PurgeGate® prevents too much pressure being delivered to the inflatable dams, but allows the increased flow, should it be required, to achieve a lower oxygen level, or for faster cooling of the pipework.

The large central collar dramatically reduces the space to be purged and makes it easier to reach the lower oxygen levels faster than with conventional purging systems. Each HotPurge™ System incorporates an innovative central band for easy positioning inside the pipe. This band, known as RootGlo® will illuminate inside the dark pipe, for up to 20 hours, with only 10 minutes previous exposure to daylight.

Each system is available in sizes 6 to 96” (150 to 2440 mm) and both inflatable dams have pull handles securely sewn with high temperature resistant Kevlar thread that will withstand a pulling force of 1,000 lb.

HotPurge™ Tube and Pipe Purging Systems can be used repeatedly for weld purges and will keep the oxygen levels below 100 parts per million (ppm) throughout the welding cycle, ensuring oxide and coke free welds, without the metallurgical imperfections caused by exposure to too much oxygen.

For more information, please contact:

Press: This email address is being protected from spambots. You need JavaScript enabled to view it.           

Sales: This email address is being protected from spambots. You need JavaScript enabled to view it.

www.huntingdonfusion.com

Published inProcessing
Friday, 04 September 2015 15:10

MultiStrikeR Tungsten Electrodes

MultiStrike® Tungsten Electrodes Offer Safer,

Cheaper TIG Welding

A 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.

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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.

Because MultiStrikes® have no radiotoxic and carcinogenic dopants such as thoria, there is no hazardous dust to be inhaled during grinding of the tips, which is actually much less anyway with these electrodes.

Suitable for a wide variety of welding operations, MultiStrikes® are said to be particularly effective in the welding of titanium, stainless steel and aluminium AC and DC, in industry sectors such as aerospace, petrochemicals, pharmaceuticals and motor sport.

­Each packet of MultiStrike® Tungsten Electrodes carries a total traceability identification that makes these electrodes particularly valuable for companies operating to ISO9000 standards or to any similar Quality Control standard.

MultiStrike® Tungsten Electrodes provide savings through longer life, more strikes per electrode before re-grinding, less re-work, less wastage and lower power requirements. There is now no need to stock a range of electrode types – MultiStrike® does everything.

More information from:

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www.huntingdonfusion.com

Published inEquipment

Weld 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.

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With over 40 years of innovation, design and manufacturing experience, Huntingdon Fusion Techniques HFT®’s hand held, battery driven PurgEye® 100, 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 Weld Purge Monitor®1 is now a fully accredited IP65 standard rated instrument that can be used out on site, in rainy and dusty conditions.

This advanced model is equipped with a push button ‘auto calibration’ feature, which allows the monitor to be calibrated both at atmospheric level (20.94%) and again at 100 ppm, to ensure the accuracy of oxygen levels for quality results.

The newly designed, extra long life sensor allows the user to continue to use the monitor for up to three years before the ‘new’ low sensor indicator appears on the screen. Once that icon appears, it provides the user with adequate time to obtain a new sensor, which can be fitted on site without any complicated electrical wiring to change, thereby saving the operator from having to return it to the manufacturer for recalibration and saving the equivalent of 50% of a new monitor.

It pays to buy the best!

The improved one piece probe assembly is a significant advantage over other models that can leak oxygen, thus distrorting readings.

The PurgEye® 100 has a clear, easy to read LCD screen, offering a 24 mm high display, which is approximately a 41% larger display than the ones used by other instruments. The display also shows a low battery icon as well as the low sensor icon already mentioned.

When the Weld Purge Monitor® is not in use, an automatic sleep mode will activate to conserve battery life.

Quick connect / disconnect, leaktight fittings are an advatage for gas purge tubing. A tripod mount is integrated in the housing, to ensure the Weld Purge Monitor® can be located securely in an accessible viewing position without having to resort to additional clamping fixtures.

The PurgEye® 100 Weld Purge Monitor® is shipped in a new, low volume ergonomically designed, attractive, more robust carry / presentation and storage case to maintain the instrument in good condition and and keep it together with all accessories.

This model can be used with any tube or pipe weld purging system, any weld chamber or weld purging enclosure.

1Huntindon Fusion Techniques Limited, owns the European Registration Mark ® for the Weld Purge Monitor®.

More information from:

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Published inProcessing
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