TUBE NEWS 2017 TN November 2017 - Page 5

The monitor can equally be used to check purge gas quality from the main source as well as from the exhaust end of a purging system and to find air leaks in purging hose connections anywhere in a system. Due to the constant upward trends in Quality Control procedures, there is growing pressure on certain Industries to carry out their welding in the absence of oxygen to an ever increasingly lower level. Metals such as stainless steel, titanium, zirconium and nickel alloys are now available to these industries to ensure the greatest strengths, the highest resistance to corrosion and of course the lowest failure rates. These metals are commonly welded with the GTAW (TIG) process that needs the arc and its surrounding zone to be shielded with a high specification inert gas that has the minimum amount of oxygen. If the welds and their adjacent metal become oxidised, which leads to a lower resistance to corrosion and that has to be prevented. For this purpose, Weld Purge Monitors® were invented in the 1970’s to measure the oxygen levels for welding by World Leading Weld Purging Experts Huntingdon Fusion Techniques HFT®. At the time, 100 parts per million of oxygen in argon was deemed to be a good level for most stainless steel and other metals, however research shows that it has become necessary these days to try to attain a purity approaching 1 ppm of oxygen in argon when shielding the welds zones in front and behind. HFT® has a Family Range of PurgEye® Weld Purge Monitors® for every application. The range includes hand held, battery operated monitors and mains powered monitors, which can read oxygen levels from atmospheric concentrate, right down to 1 ppm. Ron continues: “All of Huntingdon Fusion Techniques HFT®’s Weld Purge Monitors® and Inflatable Tube, Pipe and Pipeline Weld Purging Systems are manufactured in the UK. We do not sacrifice on quality. We guarantee to help you achieve zero colour welds, time and time again.” . Huntingdon Fusion Techniques HFT® have a worldwide Exclusive Distributor network which can be found at www.huntingdonfusion.com. TUBE NEWS November 2017 5