Pipe Freezing for Quick Pipe Repairs

qwik freezer, pipe freezing, free sealing, valve changing

Avoiding the requirement to drain down pipelines for repair work or to carry out maintenance can save a considerable amount of time and potential loss of product.

Qwik-Freezer™ Pipe Freezing System eliminates the need to drain pipework by creating a freeze plug. Available from the Pipestoppers® Division of Huntingdon Fusion Techniques HFT® Qwik-Freezer is a very cost effective and quick way to perform pipeline maintenance without draining the system, meaning very little or no system downtime.

Luke Keane, Technical Sales Manager for HFT® said: “Qwik-Freezer™ is a simple, low cost method for pipe repairs. A 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 low cost 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.”

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Unique, all in one, 10 ppm Weld Purge Monitor®

weld purge monitor, huntingdon fusion, oxygen monitor, gas analzyer, ppm trace

Metals that are classed as reactive are sensitive to oxygen when they are heated, therefore the oxygen must be purged from the welding zone before, during and after welding. When welding reactive metals such as titanium, zirconium and nickel alloys, it is therefore important to monitor the oxygen level before, during and after welding.

Weld Purging Experts Huntingdon Fusion Techniques HFT® have designed and manufactured the PurgEye® 600, all in one Weld Purge monitor®, which reads from atmospheric level of oxygen (20.94%), down to one part per million (0.0001%).

Weld Purging with a minimal level of oxygen present will avoid discolouration of the weld and heat affected zone and limit oxidation that could lead to a loss of metals’ corrosion resistant properties. It will help to guarantee the greatest weld joint strengths and the highest resistance to corrosion.

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Heavy-Duty Pipe Blocking with Steel Plugs

steel plugs, pipestoppers, blocking pipes, debris stopping, leak testing

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.

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.”

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Precise Tungsten Electrodes Tips with the TEG-1000

tungsten electrode grinder, teg-1000, diamond wheel grinder, huntingdon fusion

Correctly preparing each Tungsten Electrode for welding is crucial. It is one of the most important variables in TIG / GTA welding and each Tungsten Electrode must be ground properly to improve arc starting, stability and subsequently weld quality.

Manufactured with a diamond wheel, the TEG-1000 Tungsten Electrode Grinder from Huntingdon Fusion Techniques HFT® will ensure the grinding of each Tungsten Electrode results in clean and smooth finishes, with no splintering and eliminating arc jumping.

Luke Keane, Technical Sales Manager for HFT® said: “It is very important to have a dedicated Grinder for Tungsten Electrodes. This will help to ensure that the wheel and tungsten tip do not become contaminated during the grinding, which can possibly transfer foreign material to the weld.”

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Weld Purging CMV Steels

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

CMV Steels (chromium / molybdenum / vanadium) are widely used for their high temperature creep properties especially in the steam turbine industries.

Both pre and post weld heat treatment is necessary to achieve the optimum mechanical strength, 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.

Huntingdon Fusion Techniques HFT® has designed and developed HotPurge® Pipe Purging Systems capable of operation at these elevated temperatures.

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Low Cost Weld Purge Dams

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

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.”

“Where Tandem Weld Purging Systems are unsuitable, Weld Purge Dams are available for pipe diameters from 6 to 88” (152 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.

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High Temperature Weld Backing Tape®

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

Supporting the liquid weld root with a high temperature Backing Tape will ensure minimal oxidation and will require much less post-weld cleaning.

Argweld® glass fibre Weld Backing Tape® from Huntingdon Fusion Techniques HFT® supports weld roots and eliminates the creation of slag, whilst removing contact with air to dramatically reduce the amount of contamination.

Ron Sewell, Chairman for HFT® said: “Available up to 600 amps, our Weld Backing Tape® has no true melting point so it works satisfactorily with TIG or MIG welding (GTAW or GMAW) where temperatures can reach up to 6,000ºC. This overcomes the concerns associated with ceramic fibre versions that have a melting point of 1,800ºC.” 

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Monitor Your Weld Purge at a Distance

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

When welding long pipelines, one problem operators often face is not receiving a fast and true weld purge reading from the weld zone.

Huntingdon Fusion Techniques HFT® make it possible to have an immediate reading of the weld purge gas from any distance up to 1,000 metres away with the PurgEye® 1000

This unique Weld Purge Monitor® has a stainless steel sensing head that can be fitted onto any Pipe Weld Purging System or simply left in the welding zone and have the oxygen levels transmitted electronically to a monitor up to 1 km away.

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Premium Quality Rubber Plugs

rubber plugs, inflatable plugs, pipe stopping, pipe blocking

Lightweight Inflatable Rubber Plugs are available from the Pipestoppers® Division at Huntingdon Fusion Techniques HFT® for sealing, stopping and blocking pipes where oils, hydrocarbons and petrochemicals are present.

Challenging pipe stopping conditions can cause major inconveniences but many alternative products are not able to handle such situations.

Luke Keane, Technical Sales Manager for HFT® said: “Our Rubber Plugs are manufactured from high quality materials, ensuring a long life span of each Plug. They serve many purposes for a range of different industries and are highly resistant to oils, hydrocarbons and petrochemicals.”

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Effective Heavy-Duty Pipe Stopping

aluminium Plugs, drain plug, leak testing, pipe plugging, pipe stopping

HFT® Pipestoppers® Aluminium Plugs have been designed for use in applications where pipes carrying fluids need to be plugged or sealed. They are available up to 36’’ (900mm) and can accommodate temperatures up to 250⁰C.

These heavy-duty plugs are manufactured with a low-friction washer to ease tightening of the ring nut that expands a rubber ring and make a completely leak-tight seal. In addition, because the plugs are neutrally buoyant they can also be used in sub-sea environments.

Standard plugs are fitted with a natural rubber seal, but alternatively silicone, nitrile, neoprene or Viton can be supplied if required.

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Oxygen Monitor for Welding

purgeye 100, low cost welding, welding stainless steel, weld purging, weld purging technology

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

Before 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.

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Low Cost Weld Purge Plugs for Tube and Pipe Weld Purging

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

Due to tight budgets, welders sometimes have to construct their own Weld Purging Equipment, often made from materials such as paper, card, sponge or foam. Homemade dams made from such materials can often lead to loss of welds when they leak or slip from position thus flooding the welding zone with oxygen.

The Pipestoppers® Division of Huntingdon Fusion Techniques HFT® manufacture a range of low cost, lightweight Weld Purge Plugs for a variety of applications where the pipe sizes are 0.5 to 6” (12 to 150 mm) diameter.

Ron Sewell, Chairman for HFT® said: “Our Weld Purge Plugs are a great barrier for purging pipes when welding alloys and stainless steel. Manufactured with a hollow shaft, these plugs can be used for weld purging smaller diameter pipes and miscellaneous stubs.”

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