TPT January 2017

WE LD I NG

Orbital TIG welding FOR high quality orbital TIG welding it is important that the tungsten electrode is ground precisely or the weld will never be correct. Such precision requires experience and skill.

With accurate grinding it is possible to weld longer; that means greater efficiency and at the same time the weld seams are higher quality. The Ultima-Tig-Cut model serves a double function: precision grinding and cutting of tungsten electrodes. The electrodes can be cut down to just 8mm, thereby making it possible to make the exact electrode length needed for the orbital welding head and minimising waste of the expensive electrodes. Ultima-Tig-Cut is also an environmentally friendly wet grinder that collects toxic dust particles so they can be safely disposed of. With an AutoGrind module on Ultima-Tig-Cut or Ultima-Tig the user is guaranteed the same precise grinding every time as AutoGrind takes care of it automatically, effectively and reliably. This results in a more effective work process and better welds. For workers, grinding with AutoGrind is also more ergonomic as it cuts out repetitive wrist and arm movements. The electrodes are ground and centred with 100 per cent precision, so

A tungsten grinder offers high quality welds, and Inelco Grinders have developed several machines based on this technology that uses tungsten electrodes.

it is easier to achieve top quality welds. Full adjustability ensures the proper angle every time. Waste of electrodes during grinding is minimised with each grinding job. Grinding is not needed as often when the electrode has been ground with an Inelco grinder, and the company’s grinders can grind down to 8mm.

Inelco Grinders – Denmark Website: www.inelco-grinders.com

Purging large diameter pipes for welding WAITING for pipes to be purged ready for welding can take hours, depending on the diameter of the pipe being welded and the method chosen for purging. can be introduced for applications such as this, achieving a faster purge down to the lowest oxygen levels, which is suitable for larger diameter pipes where quality welds are required.

it possible to safely inflate the dams with argon gas, for purging the space between the dams where the weld joint is located. With PurgeGate, burst dams are prevented in the event of undue pressure increase or accidental flow increase of the purging gas. All systems are manufactured as standard with a hose for connecting a Weld Purge Monitor ® , which can read oxygen levels down to as low as 10 ppm, depending on the model. Materials used in the manufacture of QuickPurge are resistant to the higher weld temperatures present, and they do not outgas, preventing weld contamination. For pre-heated chrome steel and high strength stainless steel pipe joints, HFT designs and manufactures the HotPurge™ range for a higher and longer temperature exposure. Huntingdon Fusion Techniques – UK Email: hft@huntingdonfusion.com Website: www.huntingdonfusion.com

Huntingdon Fusion Techniques (HFT) designs and manufactures a range of QuickPurge ® inflatable pipe purging systems that reduce waiting times. The company was recently tasked with a special project in the USA, where pipes with 90° elbows, up to 54" Ø were required to be purged. Georgia Gascoyne, CEO at HFT, said, “We manufactured QuickPurge systems with longer sleeves so that they could easily be pulled around the sharp bends in the pipework. The welders were previously spending half a day purging the pipe, which was costing a considerable amount in time and gas costs. With the help of QuickPurge the pipe was purged down to 100 ppm ready for welding in just 55 minutes. The dramatic savings in time and argon paid for the system in just one weld.” QuickPurge has an additional gas input line, which means extra purge gas

The design of the QuickPurge system means that zero-colour welds can be achieved, and there will be no loss of corrosion resistance caused by oxidation. Using IntaCal ® combined with the integrated PurgeGate ® device makes

HFT’s QuickPurge systems

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J anuary 2017