TPT September 2017

T E CHNOLOG Y

Tube welding accessories TITANIUM, stainless steel and other corrosion-resistant materials are used for tubing and pipework especially where there are highly corrosive materials flowing through them.

Savings on expensive cleaning and pickling costs to remove oxidation and discolouration on these corrosion-resistant materials pay for the 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 17mm 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.” Huntingdon Fusion Techniques – UK Fax: +44 1554 836 837 Email: hft@huntingdonfusion.com Website: www.huntingdonfusion.com

to an argon gas source and when the weld is started it allows extra argon to flood to the sides of the weld, 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 this lightweight and low cost tool is easy to drag along the surface being welded. One further benefit is that it carries the welding torch at 90° 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.

When such pipework is welded for joining or repairs, it is necessary to protect the material in and close to the weld joint using 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 accessory – called aWeld Trailing Shield ® – can be added to a GTAW/TIG welding torch before beginning a pipe weld. This lightweight tool, designed and manufactured by weld purging expert 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

www.kraussmaffeiberstorff.com

Your advantages at a glance: – Low tolerances for wall thickness and diameter – Significant material costs reduction thanks to exact layer and thickness distribution – Short flushing and cleaning times

Power for your multi-layered pipes Pipeheads for PO processing

Engineering Value