Press

Low cost welding accessories

Posted by Michaela Reay

06-Jun-2017

huntingdonfusion.com


Titanium, stainless steel and other corrosion resistant materials are used for tubing and pipework especially where there are highly corrosive materials flowing through them.

When such pipework is welded for joining or repairs, it is necessary to protect the material in and close to the weld joint, carried out by a technique called Weld Purging. Oxygen and nitrogen can be harmful to the weld joint in particular as they will combine very easily with the hot material, forming oxides and nitrides, until the temperature falls below its oxidation point.

One inexpensive accessory called a Weld Trailing Shield® can be added to a GTAW/TIG welding torch before beginning a pipe weld. This lightweight tool, designed and manufactured from Weld Purging Experts Huntingdon Fusion Techniques HFT®, is easily manoeuvred around the pipe joint as it is being welded, with no inconvenience to the welder.

The Trailing Shield® is connected to an argon gas source and when the weld is started, it has extra argon flooding to the sides of the weld and covering the heat affected zone adjacent to the weld. As the welding torch is moved forward, because of the length of the Trailing Shield®, the weld remains under an argon gas shield until the welded metal has cooled below its oxidation temperature.

For manual welding, the welder finds that with this lightweight and low cost tool, there is no difficulty in dragging it along the surface being welded. One further benefit is that it carries the welding torch at 90º to the weld. 

With automatic welding machines it is possible to raise the welding speed dramatically and enjoy the major benefits of automatic welding. Each Trailing Shield® is delivered with a variable diameter connector so that it can fit any size of TIG/GTAW/PAW welding torch for manual or mechanised welding.

Savings on expensive cleaning and pickling costs to remove oxidation and discolouration on these corrosion resistant materials pay for these shields in the first weld and the shields can be used for years without replacement.

Trailing Shields® are available immediately for any diameter of tube and pipe from 17 mm upwards. They are also manufactured in flat format for sheet metal welding.

Luke Keane, Distributor Support for HFT® said: “The Trailing Shield® is connected to the argon gas supply and it diffuses gas out evenly without turbulence through the multi layers of stainless steel mesh built into the body of the shield. At each side, removable silicone rubber side shields provide a barrier to prevent the argon escaping sideways and remaining over the weld metal. These silicon shields are a consumable and are replaceable as they become worn.”

YouTube Video available at: https://youtu.be/X6dHUIRh3Ow


Visit source site

huntingdonfusion.com

weld trailing shieldsinert gas coveragehuntingdon fusionweld purgingback purging

More items from michaelareay


New: Unique 10 ppm Colour Touch Screen Weld Purge Monitor®

It is essential to monitor the oxygen level when welding reactive metals. Metals that are classed as ‘reactive' (titanium, zirconium and nickel alloys) are sensitive to oxygen when heated. When welding these metals, the oxygen must be purged from the welding zone, down to as low as 10 parts per mil ...

Michaela Reay


Posted 13 days agoPress > purgeyeweld purge monitorweld purging +2

Heavy-duty Flow and Line Stopping with Steel Plugs

There are occasions where pipes need to be repaired whilst liquids are still flowing. Heavy-duty flow stopping and line plugging may require plugs and stoppers to have long immersion in chemicals or exposure to high temperatures, which many such items are not capable of withstanding. Providing th ...

Michaela Reay


Posted 19 days agoPress > flow stoppingline stoppingline plugging +2

Improve Tungsten Electrode and Welding Arc Performance with the TEG-1000

Tungsten Electrode Grinders are essential with TIG/GTA welding. Using a Grinder that has been designed and manufactured specifically for tungsten metal is not only a much safer option, they provide more accurate results leading to as many as ten times greater number of arc strikes and giving very d ...

Michaela Reay


Posted 26 days agoPress > tig weldingteg1000thoriated tungsten electrodes +3

Weld Purging Post Weld Heat Treated (PWHT) Pipework

Welding processes can weaken metals by imparting residual stresses into a material, leading to a reduction in corrosion resistance properties. Post Weld Heat Treatment (PWHT) is regularly used to retain the strength of a metal when welding certain materials including high strength stainless steel a ...

Michaela Reay


Posted 1 month agoPress > weld purgingpwht pipeworkhotpurge +1

Weld Purging: Replace Paper, Foam and other unsuitable Materials with Argweld® Weld Purge Dams

Weld Purging is essential when welding tubes and pipes made of reactive metals such as stainless steels, titanium and zirconium. Usually weld zones are confined with purge dams so that the use of argon purge gas is limited and waiting times are reduced. Homemade dams fabricated from paper, sponge ...

Michaela Reay


Posted 1 month agoPress > huntingdonhuntingdon fusionHFT +2
All posts from michaelareay