Welding Enclosures for Titanium Parts

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Welding titanium alloys often has to be carried out in an environment where oxygen can be eliminated throughout the welding cycle. If the parts were to come into contact with oxygen ay any point, the reactive metal can become contaminated, oxidising which can lead to reductions in corrosion resistance and mechanical strength.

Metal glove boxes, which are still in use today, can be used to provide an inert gas coverage. However these glove boxes are often large, heavy and expensive. Welders are challenged by their lack of flexibility when welding small parts.

Ultra low cost Flexible Welding Enclosures® designed by Huntingdon Fusion Techniques HFT® are easy to use. They are manufactured from an optically clear ultra-violet resistant engineering grade pvc, providing excellent vision and ease of access.

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Oxygen Monitor for Field Welding

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Welding under site conditions introduces problems that are not found in normal factory environments. Exposure to heat and cold, sand and dust, damp and wet atmospheres place demands on standard Weld Purge Monitors® for which they are not designed to meet

The PurgEye® Site, available from Weld Purging Experts Huntingdon Fusion Techniques HFT® is protected inside a secure, safe, waterproof and dustproof, tough carry case, perfect for field welding.

Georgia Gascoyne, CEO for HFT® said: “Field welding does not eliminate the need to measure oxygen levels when welding metals such as stainless steel, zirconium and titanium. Often, welders are left to guess at purge levels, due to some Weld Purge Monitors® not being able to handle various on site conditions.”

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Purging Large Stainless Steel Pipes

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Restricting the volume when welding large stainless steel tube and pipes can save huge amounts of time and inert gas costs.

Previously, welders have spent many hours waiting for oxygen levels to be low enough to start welding.

Leading the way in Weld Purging Innovation and Technology, 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).

Ron Sewell, Chairman for HFT® said: “The deflated QuickPurge System is placed inside the pipe and inflated. RootGlo® luminescent positioning strip illuminates the joint position ensuring that the System is positioned in the pipe correctly. The QuickPurge® is then inflated and connected to a Weld Purge Monitor® to measure the exact oxygen level throughout the welding cycle.”

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Liquid Nitrogen Pipe Freezing

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Pipe freezing is a simple and efficient way of sealing a pipe or system while pipe repairs or general pipework maintenance is carried out, without the need to drain the system.

Accu-Freeze™ Pipe Freezing Systems are available from the Pipestoppers® Division of Huntingdon Fusion Techniques HFT®.

Accu-Freeze™ works by reducing the pipe fluid to a temperature below its freezing point and developing a freeze plug. This controlled method of pipe freezing uses liquid nitrogen (LN2) to freeze stationary liquids in a section of pipe or tubing. The nitrogen is passed through a coil surrounding the pipe producing a frozen plug inside and hence preventing flow through the part to be removed.

Luke Keane, Technical Sales Manager for HFT® said: “Accu-Freeze™ ensures very little drain-down or refill and little to no system downtime.”

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Flow Stopping Solutions for all Applications

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

Flow and line stopping equipment gives the user the opportunity to isolate a section of pipeline to carry out repair and maintenance work.

The Pipestoppers® Division from Huntingdon Fusion Techniques HFT® design and manufacture a Range of standard and non-standard Inflatable Stoppers for tanks, chambers, tubes, pipes and pipework fabrications, offering a range of pipe stopping and blocking requirements.

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.”

 

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Monitor your Titanium Welds for High Quality Results

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

Preventing oxidation when welding tubes and pipes can be achieved by purging the inside with an inert gas. This simple procedure saves both time and cost. By knowing the exact level of oxygen inside the pipe at all times, the welder knows when to start welding for high quality results.

With restricted budgets in mind, the basic-entry level 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 alloys.

A customer recently said: “The PurgEye® Nano is really easy to use, with excellent results. Previously, each welder would let argon flow as much as possible before starting to weld, to be sure that purging was sufficient. Now, they know when to reduce it prior to welding and in such a way they save good amount of argon. There is no guessing and welders and their assistants can use it after only a few minutes of instruction.”

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Argon Regulator for Pipe Purging Systems

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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.

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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Pipe Purging accurately down to 10 ppm

purgeye 200, weld purge monitor, oxygen reader, ppm trace, gas analyzer

Measuring the oxygen level during Pipe Purging is crucial. Stainless steel has to be monitored down to at least 100 ppm, however alloys such as titanium and zirconium may need to be monitored down to as low as 10 ppm.

Pipe Purging Experts Huntingdon Fusion Techniques HFT®’s PurgEye® 200 Weld Purge Monitor® will ensure zero colour, non-oxidised welds are achieved every time, with accurate readings down to 10 ppm.

The PurgEye® 200 is a portable, hand held 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.

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Successful Low Cost Weld Purging

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Weld Purging is the act of removing oxygen from the vicinity of a joint before, during and after welding. Metals that require weld purging include stainless steels, titanium and zirconium.

Weld Purging various sizes of tubes and pipes can be challenging as well as expensive, which is why many welders today continue to construct their own dams to cut costs. Homemade dams made from material such as foam, sponge or paper can often lead to loss of welds when they leak or slip from position thus flooding the welding zone with air.

Leaders in Weld Purging Technology, Huntingdon Fusion Techniques HFT® offer low cost Weld Purge Film® Kits which can be cut to each pipe size.

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Oxide Free Titanium Welds with the PurgEye® Desk

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The Welding Institute states that “Titanium is a reactive metal; it will burn in pure oxygen at 600°C and in nitrogen at around 800°C. Oxygen and nitrogen will also diffuse into titanium at temperatures above 400°C raising the tensile strength but embrittling the metal. Despite this reactivity titanium is used extensively in chemical processing, offshore and aerospace applications."

In critical welding applications, it is therefore crucial that the oxygen level surrounding the weld is purged of oxygen to 50 ppm or lower. Measuring the oxygen level is the most efficient way to know exactly when to commence welding.

The PurgEye® Desk is leading the way in inert gas purging technology by reading oxygen levels from 1,000 ppm, right down to levels as low as 1ppm (highly accurate to 10 ppm), ensuring titanium welders achieve perfect oxide free, zero colour welds time and time again.

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Pipe Freezing for Quick Pipe Repairs

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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®

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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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