Press

Welding of Vacuum Tubing and Piping

Posted by Michaela Reay

07-Dec-2016

huntingdonfusion.com


Welds in tubing and pipework for vacuum systems should have many important characteristics. They ideally need to be manufactured from stainless steel, leak tight, the joints should have full penetration with excellent sidewall fusion, there should be no porosity and the finish should be free from oxidation and discolouration.

When welding these stainless steel tubes and pipes, it is important to purge the welding zone with an inert gas, usually argon, to prevent loss of corrosion resistance, oxidation, discolouration, metallurgical defects and to ensure a good internal weld profile.

After 40 years of innovation, design and manufacturing expertise in the field of tube and pipe weld purging, Huntingdon Fusion Techniques HFT® has introduced PurgElite®, a range of low cost Tube and Pipe Purging Systems to achieve a clean, oxide free, zero colour weld in such tubes and pipes. As well as vacuum tube and piping, PurgElite® can be used in any other industry where stainless steel or titanium is used.

Georgia Gascoyne, CEO for HFT® said: “We recently had a customer who was wasting a lot of money in time and inert gas costs by filling entire pipework systems with argon in order to weld the stainless steel pipes in an inert environment. There were several 90O bends in the pipework, so the customer thought filling the whole pipework system with expensive argon gas, was the only option.”

“To save welders the expense of completely filling tubes and pipes with an inert gas, PurgElite® Systems with their double inflatable dams are available, manufactured to suit pipe diameters from 1” to 24” (25 to 600 mm).”

PurgElite® is manufactured with a special spinal tube, joining the two dams, that is resistant to hot metal up to 300OC (572OF) and is super flexible to allow movement around 90O bends. These pipe weld purge systems are made of low outgassing rate materials, which gives them the ability to produce the right environment for high quality welds.

IntaCal®, a purge gas feed device means there is no complicated valve to set. To ensure the PurgElite® System can be positioned accurately inside the tube or pipe, a centrepiece glow positioning indicator RootGlo® comes as standard on all sizes.

HFT®'s innovative PurgeGate® valve is available as an accessory, a unique one way valve suitable for all types of Inflatable Pipe Weld Purging Systems. PurgeGate® regulates the gas flow and pressure during welding to ensure the inflatable dams don't burst resulting in a failed weld.  

Heat Resistant Covers are available as accessories to protect the inflatable dams in the event that the weld process is unusually hot. These covers suit any inflatable purging or blocking system and are held onto each dam by a number of ties. Such covers allow use up to a temperature of 300OC.

There are many fabricators still using poor quality home made devices fashioned from foam, wood, metal and rubber. They are wasting vast amounts of money on expensive argon gas and labour by allowing their welders to continue in their old, often ineffective ways.

By using PurgElite® Tube and Pipe Purging Systems, companies can save significant money in both time and inert gas costs. Contact HFT® for a live demonstration and return on investment charts.

Watch the PurgElite® demonstration video, available at: https://youtu.be/Q-dSRpPvd1s

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



New service from OilVoice
Trip Shepherd is for companies who need to track their staff in areas of risk.
It's free to use, so we invite you to try it.

Visit source site

huntingdonfusion.com

huntingdon fusionhuntingdon fusion techniquesHFTweld purgingweldingPurgEliteZero colour weld

More items from michaelareay


Effective Heavy-Duty 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 tig ...

Michaela Reay


Posted 9 days agoPress > huntingdon fusionaluminium plugspipe stopping +2

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. 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 cos ...

Michaela Reay


Posted 17 days agoPress > weld purge monitorhuntingdon fusionppm trace +1

Low Cost Weld Purge Plugs for Tube and Pipe Weld Purging

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 ...

Michaela Reay


Posted 23 days agoPress > weld purge plugsweld purgingback purging +1

Inflatable Pipe Weld Purging Systems Drastically Restrict Weld Purge Volumes

Inflatable Pipe Weld Purging Systems are in use worldwide, restricting weld purge volumes, making huge savings in time and inert gas. Huntingdon Fusion Techniques HFT® design and manufacture PurgElite®, a range of low cost Tube and Pipe Purging Systems to achieve a clean, oxide free, zero colour w ...

Michaela Reay


Posted 30 days agoPress > huntingdon fusionPurgElitepipe purging +2

Increase the life of your Tungsten Electrode with MultiStrike®

Thoriated tungsten electrodes are still widely used in GTAW/TIG welding despite the potential health hazards. Thoria is added primarily to stabilize the arc but it is radio-toxic and radio-toxic dust is generated during electrode grinding. To overcome the risk posed by harmful products Huntingdon ...

Michaela Reay


Posted 1 month agoPress > multistrikethoriated tungsten electrodestungsten electrides +2
All posts from michaelareay