TPT May 2015

Technology News

Producing zero-colour, non-oxidised weld roots

joints, the PurgExtra series allows the operator to purge normally at first, and then, when conditions are correct, to introduce additional gas at high flow rates to create a faster purge and a more efficient removal of unwanted gases. One of the key reasons to use a PurgExtra system is for the operator to achieve zero-colour welds. The extra gas flow possible with PurgExtra models purges additional gases that are expelled by outgassing

to safely purge the space between the dams. IntaCal replaces the complicated valves that might sometimes fail and cause the dams to burst. The highly flexible hose allows the PurgExtra systems to be pulled or pushed easily around bends and elbows. A strip of RootGlo ® material, located in the centre of the hoses between the dams, allows the welder to see clearly when the PurgExtra system has reached the correct position in the pipe. RootGlo can be charged by leaving it in daylight for 30 minutes, after which it will provide up to 24 hours of bright illumination inside the pipe. As an option, the PurgeGate accessory may be fitted to the PurgExtra systems to protect the inflatable dams from accidental or faulty opening of gas supply valves significantly above the recommended flow rate, giving further protection to the dams against bursting. Huntingdon Fusion Techniques – UK Fax: +44 1554 836 837 Email: hft@huntingdonfusion.com Website: www.huntingdonfusion.com

PURGEXTRA™ is the latest weld purging product range from Huntingdon Fusion Techniques (HFT) for the weld purging of tubes and pipes from 1" to 24" diameter. The range complements the PurgElite ® series, but in addition has extra purge gas inlets and corresponding exhaust ports. Designed for the weld purging of titanium in particular, as well as ultra high purity stainless steel joints, corrosion- resistant alloy welding and Duplex steel

that occurs as the metal is being heated. The extra gas flow will prevent these expelled gases from combining with the hot metal and oxidising them, which causes the metal to discolour. PurgExtra comprises two inflatable dams connected by a heat- resistant, highly flexible gas hose that has the IntaCal ® II gas release system integrated. The IntaCal ® II allows the dams to be inflated correctly and then releases the inert gas

PurgExtra’s dams are connected by a highly flexible gas hose

Spark protection for welding fume extraction units

disposed of easily and simply according to their risk classification. The ProtectoSpark is available from stock for next-day delivery. Extractability operates from purpose- built facilities in Letchworth Garden City, Hertfordshire, UK, supplying portable, mobile and fixed welding fume extraction installations, including custom-designed solutions, to the UK distributor market and exporting to a number of countries around the world.

taken inside the filter unit via the air intake. There, the air hits the baffle plate and is led along the baffle plate towards the collecting tray. At this point, air deflects by 180°, into the particle filter. Induced by the deflection, larger particles such as extinct spark particles fall into the collecting tray and stay there. Removal of dust is carried out simply by opening the maintenance door on the front and taking out the collecting tray. Without the ProtectoSpark, much of the welding fumes would have hit the filter directly and greatly reduced its lifespan. Instead, the particles can be

EXTRACTABILITY, a division of Weldability-Sif, is a UK-based ‘one- stop source’ for welding fume extraction solutions. The company has introduced ProtectoSpark, a new product for the UK market, designed to prolong the life of filters. Ready to use within minutes, ProtectoSpark consists of two components – a baffle plate and a collecting tray – and provides spark protection for the ProtectoXtract welding fume extraction unit. It can also be retrofitted. Using the ProtectoXtract welding fume extraction unit, the polluted air is sucked in via extraction elements and

Extractability – UK Fax: +44 8009 707757

Email: sales@extractability.eu Website: www.extractability.eu

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M ay 2015