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Monitor your weld purge at a low cost

Weld Purge Monitors® are essential instruments to help obtain non-oxidised, zero colour welds. By measuring the oxygen content before, during and after welding, high quality welds are achieved when welding metals such as stainless, chrome and duplex steels as well as titanium and nickel alloys.

Advancing in the science of manufacturing beyond other designs, Huntingdon Fusion Techniques HFT®'s market leading PurgEye® 100 can help to eliminate the significant post weld cleaning costs that occur when the oxygen level has not been monitored correctly during welding.
 
Ron Sewell, Chairman for HFT® said: "We recently had a European Gas Turbine Manufacturer who was spending a lot of time and money cleaning oxidised stainless steel welds. They were using an unsuitable means to guess the reduction of oxygen. 

They contacted one of our Exclusive Distributors, who were able to visit them onsite and demonstrate the PurgEye® 100. This low cost monitor accurately measures from atmospheric level (20.94%) down to 100 parts per million (ppm), meaning the welder knows exactly when to commence welding in order to achieve a perfect weld every time."

The PurgEye® 100 is IP65 rated and comes with innovative 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.

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 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).

PurgEye® 100 video can be viewed at: https://youtu.be/quw_xtSZDAw

Huntingdon Fusion Techniques HFT® - footnotes
Huntingdon Fusion Techniques HFT® have a Worldwide Exclusive Distributor network.

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.

For further information, e-mail: michaelareay@huntingdonfusion.com or view website: www.huntingdonfusion.com

Weld Backing Tape™ for weld purging

It is important when welding metals such as stainless steel, titanium and zirconium that the welding zone is purged of oxygen even as low as 10 parts per million (ppm) before, during and immediately after welding, in order to achieve a clean, oxide free, zero colour weld.

During a recent trip to South America, Weld Purging Experts Huntingdon Fusion Techniques HFT® were supporting their Exclusive Distributor and local customers when an exciting discovery was made concerning the use of their Argweld® Backing Tape™.

One customer showed how the use of his former ceramic backing tiles and the tiny space available for the weld root formation, prevented adequate argon flow and caused the welding arc to blow back at the welder. 

Luke Keane, Distributor Support for HFT® said: "Ceramic backing tiles are designed for Submerged Arc Welding where oxidation is prevented by powder as opposed to argon, so the customers were using the wrong product for GTAW / TIG welding. A demonstration of Argweld® Backing Tape™ followed, which allowed the argon to flow freely, eliminating the blow back of the arc that was happening previously and enabling the welders to produce a perfect root weld."

Huntingdon Fusion Techniques HFT®'s Weld Backing Tape™ comprises a 3" (75mm) wide aluminium adhesive tape backing strip, in the centre of which is a 1" (25mm) wide band of woven glass fibre matting.

Once the tape is positioned with the glass fibre matting under the centre of the weld joint, the welders can start their arc. The welding torch argon flow has plenty of space to move between the pores of the matting, which allows the welding arc to stabilise and start forming the weld root.

Measured by a Weld Purge Monitor®, all contaminating oxygen below 100 parts per million (ppm) is removed and the stainless steel weld root is completed successfully, with the molten metal being cast onto the fibre glass with excellent side wall fusion and underbead profile.

The customer was so enthusiastic with the clean, metallurgically sound, non-oxidised weld that they placed a large order for HFT®'s Weld Backing Tape™ for immediate delivery. Fortunately, the local Distributor had sufficient stock levels, were able to accommodate their wishes within hours and have them welding the same day.

Weld Backing Tape™ demonstration video can be viewed at: https://youtu.be/F6amA6rX2og

For further information, e-mail: michaelareay@huntingdonfusion.com or view website: www.huntingdonfusion.com

Inflatable stoppers for pipe plugging and blocking

Reducing volume in pipes or tanks for weld purging, for blocking pipe ends or open orifices in systems in order to conduct routine maintenance or perhaps even to prevent the entry of foreign bodies into pipes or vessels can be much easier with an Inflatable Pipestopper®.

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

Ron Sewell, Chairman for HFT® said: "These versatile Inflatable Stoppers are used to service a wide variety of industrial applications. As "overnight stoppers" they provide a strong barrier in pipeline activities, to prevent foreign bodies entering the line during 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 turbines etc.

"When welding large tanks and vessels, stoppers inflated with air can dramatically reduce the volume inside, so that the argon purging process takes little time and uses the minimum of expensive gas. The stoppers can pay for themselves in one weld or application and can be used multiple times."

Other applications include leak testing of pipework systems, whether commercial, domestic or industrial, in pipes made of any materials.

All Inflatable Stoppers are manufactured with a strong internal latex balloon covered in a waterproof polyurethane coated nylon bag for low friction and to prevent the production of static electricity or accidental sparking.

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.

The standard range of Inflatable Stoppers is available for immediate delivery in Cylindrical or Spherical formats with sizes ranging from 1 to 96" (25 to 2,440 mm).

Inflatable Stoppers are available with heat resistant covers to protect them against high temperatures.

HFT® also has a range of Rubber Inflatable Stoppers that are suitable for petrochemical applications and are resistant to all hydrocarbon fluids and gases.


For further information, e-mail: michaelareay@huntingdonfusion.com or view website: www.huntingdonfusion.com

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