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


Portable 10 ppm Weld Purge Monitor

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 specifica ...

Michaela Reay


Posted 12 days agoPress > weld purgingweld purge monitorpurgeye +2

Weld Purging: Replace Foam with Film for High Quality Welds

The use of home made sponge foam purge dams for pipe weld purging is still very familiar throughout the welding industry. However, operators are unaware as to how the use of sponge foam can adversely influence the metallurgical strength of a joint. When sponge foam starts to warm up from the heat ...

Michaela Reay


Posted 19 days agoPress > weld purgingweld purge filmhuntingdon +3

Zero Colour Titanium Welds with the PurgEye® Desk

Titanium is the metal of choice in a variety of industries due to its excellent corrosion resistance to acids, chlorides and salt. Titanium has a wide continuous service temperature range, from liquid nitrogen (-322°F) to 1,100°F and the highest strength-to-weight ratio of any metal. Titanium is a ...

Michaela Reay


Posted 26 days agoPress > purgeyepurgeye deskhuntingdon fusion +2

No Draining the Pipe System with Pipe Freezing

Eliminating the need to drain long sections of pipe for repairs or modifications and reducing shut down time is now possible with Pipe Freezing Systems. The Pipestoppers® Division at Huntingdon Fusion Techniques HFT® provides a cost saving solution with Qwik-Freezer™, the industry standard portabl ...

Michaela Reay


Posted 1 month agoPress > pipe freezingqwik freezeraccu freeze +2

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 1 month agoPress > purgeyeweld purge monitorweld purging +2
All posts from michaelareay