Press

Improve Weld Root Profiles with Backing Tape®

Posted by Michaela Reay

23-May-2017

huntingdonfusion.com


During the welding of tanks, chambers and vessels, an uneven root profile can cause product entrapment that may contaminate a process as well as interrupting flow characteristics. Many weld joints require a controlled underbead profile of the first root pass.

Where manual welding cannot control the weld root profile sufficiently, or when an automatic weld process is unable to reach satisfactory speeds while still obtaining satisfactory underbeads, it is common to use a method of backing below the weld. A cost-effective way to provide support for molten metal below a weld joint, is to use Weld Backing Tape®.

Weld Purging Experts Huntingdon Fusion Techniques HFT® have a Range of Backing Tape® to support all welding currents, from 80 amps, up to as high as 600 amps, providing the support to produce perfect weld underbeads.

Georgia Gascoyne, CEO for HFT® said: “Weld Backing Tape® is a glass fibre weld backing system that supports and protects the weld root from oxidation. It will trap the inert gas from the weld torch to hold the gas surrounding the weld pool, effectively providing a back purge facility. We manufacture four grades of Weld Backing Tape® for use up to 80, 160, 240 or 600 Amps.”

“Each 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 running down the centre. The glass fibre matting has differing thicknesses to match the welding current in use.”

“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.”

Using Backing Tape® it is possible to weld with MIG, TIG (GTAW) or Plasma (PAW) techniques for the joining of all weldable metals without change to the chemistry or metallurgy of the weld.

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



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

weld purgingbacking tapeweld backinghuntingdon fusionweld purging techniques

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 3 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 11 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 17 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 24 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 27 days agoPress > multistrikethoriated tungsten electrodestungsten electrides +2
All posts from michaelareay