The Welding Institute (TWI) state that: “Titanium is a reactive metal; it will burn in pure oxygen at 600°C and in nitrogen at around 800°C. Oxygen and nitrogen will also diffuse into titanium at temperatures above 400°C raising the tensile strength but embrittling the metal. In the form of a powder or metal shavings titanium also constitutes a fire hazard. Despite this reactivity titanium is used extensively in chemical processing, offshore, automotive, medical, aerospace and numerous other applications.“
During the welding of titanium, it is therefore crucial that the oxygen level surrounding the weld is purged of oxygen down to as low as 50 ppm or less. Titanium parts are usually welded inside a welding enclosure, where the entire atmosphere surrounding the weld can be kept at a controlled level of oxygen.
The innovative PurgEye® Desk, a new monitor designed and manufactured by weld purging experts Huntingdon Fusion Techniques HFT®, is leading the way in inert gas purging technology by reading oxygen levels from 1,000 ppm, right down to levels as low as 1ppm (highly accurate to 10 ppm), ensuring welders achieve perfect oxide free, zero colour welds time and time again.
Ron Sewell, Chairman for HFT® said: “The PurgEye® Desk is for use with Welding Chambers and Enclosures, as well as with Orbital Welding Machines and other Automatic Welding Systems. It is ideal for measuring oxygen levels during titanium welding, as well as other reactive metals such as platinum zirconium, Tantalum and even stainless steels.”
The PurgEye® Desk is also manufactured with HFT®’s revolutionary PurgeNet™, for the in-line connection of additional accessories that allows the Weld Purge Monitor® to control welding systems based upon oxygen level as well as to provide indications of high and low oxygen levels.
The rugged, high frequency proof PurgEye® Desk has automatic fault finding diagnostics that can detect and report a number of possible faults. It also features an OLED (organic light emitting diode) display giving brighter, sharper readings at longer distances.
With a unique, fast response, long-life sensor having little maintenance requirement, the PurgEye® Desk Weld Purge Monitor® comes complete with an integral pump to deliver the exhausting purge gas to the measuring sensor on a consistent basis to allow precision control of the welding systems.
The PurgEye® Desk is particularly suitable for use in ultra clean conditions, such as in cryogenics, food and drinks, semi-conductor, aerospace, pharmaceutical sectors and other process industries.
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