Hydrocarbon Resistant PetroChem® Stoppers

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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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Welding Enclosures for Wire Arc Additive Manufacturing

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TWI (The Welding Institute) states that: “Wire arc additive manufacturing uses arc welding power sources and manipulators to build 3D shapes through arc deposition. This process commonly uses wire as a material source and follows a predetermined path to create the desired shape. This method of additive manufacture is usually performed using robotic welding equipment.”

The use of Flexible Welding Enclosures® during the Wire Arc Additive Manufacturing process has helped to keep an inert gas shield around the titanium and other reactive alloy components with special protective enclosures designed and manufactured by Weld Purging Experts Huntingdon Fusion Techniques HFT®.

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Weld Purge Monitor for On-Site Conditions

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Welding on site can pose difficult challenges, including exposure to extremes of heat and cold, harmful sand and dust and even hazardous fumes. Contamination during welding can lead to loss of corrosion resistance and a reduction in strength so control of oxygen levels is crucial.

With another innovative development, Huntingdon Fusion Techniques HFT® have designed a virtually non-destructible Weld Purge Monitor® to work accurately within extreme environments. The PurgEye® Site is a guarded oxygen monitor in a secure, safe, waterproof and dustproof, tough carry case.

Technical Sales Manager Luke Keane said: “The PurgEye® Site is our on-site monitor, that has been specifically designed for extreme conditions. By using the PurgEye® Site, welders can ensure non-oxidised, zero colour welds are achieved regardless of conditions.”

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Low Cost Pipe Stopping for Tight Access

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Pipe blocking, plugging and sealing for duties such as repair work, leak testing, weld purging and debris stopping 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 a variety of applications.

The Low Profile Stopper is available for applications where insufficient length of pipe is available for the regular Cylindrical or Spherical Inflatable Stopper.

Ron Sewell, Chairman at HFT® said: “The Low Profile 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.”

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QuickPurge® Your Large Diameter Pipes for Perfect Welds

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Purging large diameter pipework ready for welding can be expensive. Without restricting the volume, there is a high cost involved in inert gas used and time spent waiting for the oxygen level to reach a level low enough for welding to begin.

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

HFT® was recently tasked with a special project in the USA, where pipes with 90o elbows, up to 54” (1,371 mm) ø were required to be purged.

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Secondary Inert Shielding Gas Application with Weld Trailing Shields

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A secondary inert shielding gas application is often required when welding reactive metals such as titanium alloys and stainless steels, to protect the weld from oxidation until it has cooled to a safe temperature.

The low cost Argweld® Weld Trailing Shield® provides additional inert gas coverage during welding and is available from Huntingdon Fusion Techniques HFT® in flat and radiused versions.

Ron Sewell, Chairman for HFT® said: “Our Trailing Shields® simply attach onto any TIG/GTAW, PAW/Plasma and MIG/GMAW welding torch, ensuring that the weld stays under a protective inert gas coverage while the hot weld metal is cooling, preventing it from oxidising on contact with air.”

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Safe Pipe Repair with Accu-Freeze™

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Pipe freezing for temporary pipe isolation has now become the safest, quickest and most cost-effective method for pipeline leak testing, maintenance work or for making pipe repairs including valve and other control system replacements.

It is still very common for maintenance workers to drain down entire systems before repairs can be made but this can lead to time lost spent draining and disposing of the product.

To dramatically reduce costs whilst maintaining the highest level of safety, Accu-Freeze™ pipe freezing systems are available from the Pipestoppers® Division of Huntingdon Fusion Techniques HFT®.

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Pressure Testing Pipework up to 6 Psi with Inflatable Stoppers

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Vessels such as pipelines, gas cylinders and fuel tanks are often pressure tested for strength and leaks.

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: “Our range of Inflatable Stoppers can be used for carrying out pressure tests as an alternative to mechanical test plugs.”

“Depending on the size plug, these Inflatable Stoppers have an inflation pressure of up to 10 Psi (680 mb) and will hold a back pressure of 400 mbar (5.8 Psi).”

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Low Cost Weld Purge Monitor for Welding Titanium

purgeye nano, weld puge monitor, gas analyzer, oxygen reader, ppm trace

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.

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.

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No Burst Pipe Purging Systems with PurgeGate

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Pipe welders are now turning more and more to Inflatable Pipe Purging Systems because of their easy use to complete a weld faster and with less risk of oxidation, to save money from the speed and the avoidance of reject or cut outs.

These unique systems restrict weld purging zones, saving time waiting for pipes to be completely filled with argon, purged down to a low enough oxygen level to start welding safely, without the risk of oxidation.

It is still common however for some Inflatable Pipe Purging Systems to burst due to over-inflation, resulting in a lost weld and additional re-work.

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.

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High Quality Feed Hose for Inert Gas Supply

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Using a high quality gas welding hose will ensure a leak tight method of feeding non-contaminated gas into the welding zone for weld purging.

Continuing their pursuit to advance in Weld Purging Technology, Huntingdon Fusion Techniques HFT® now manufacture tailor made Inert Gas Feed Hose assemblies with leak tight fittings and a low outgassing rate.

Luke Keane, Technical Sales Manager for HFT® said: “It is important when welding all reactive metals that the welding zone is purged of oxygen, even down to as low as 20 parts per million (ppm). Our Inert Gas Feed Hose assemblies are the best way of transporting argon, helium and other inert gasses to the welding zone where a guaranteed leak tight, non contaminated delivery is required.”

“All of our products are made to the highest quality and standard and are the best available for argon and helium gas use.”

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Portable 10 ppm Weld Purge Monitor

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With ever-improving standards in Quality Control, measuring the oxygen level around welds before, during and after welding reactive metals is crucial.

The hand held PurgEye® 200 is a Weld Purging Monitor® specifically developed and designed for use when welding titanium, zirconium, high specification stainless steel and nickel alloy joints, so that the user can produce metallurgically sound and oxide-free welds every time.

Manufactured by Weld Purging Experts Huntingdon Fusion Techniques HFT® the PurgEye® 200 is equipped with PurgeNet™, allowing accessories to be connected. These include an automatic welding machine interface so that the oxygen level in the vicinity of the weld can be continuously monitored and the welding machine can be switched on or off according to pre-set oxygen levels, an external audible and visual warning devices and a dew point monitor.

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