Page 33 - ITA Journal 3-2018
P. 33
Technical Papers
The product range, which includes QuickPurge® and PurgElite® (Figures 5 and 6), has been used successfully and internationally during the welding of reactive and refractory alloys for the nuclear, liquid natural gas LNG, aerospace and process industries.
Fig. 5 Fig. 6
Flexible Enclosures
The highest level of protection is afforded by undertaking welding in a vacuum as in, for example, the electron beam process. A less effective process uses a metal enclosure, the ‘glove box’, which can be lled with inert gas. Both these techniques are relatively expensive to manufac- ture and only justi ed by companies involved in high volume produc- tion where the cost can be easily amortised.
Ultra violet stabilized engineering polymers are used throughout during manufacture of Flexible Enclosures. Material thickness is nominally 480 microns.
A large principle access leak-tight zip is tted. Additional entry points provide for operators gloves access ports for welding torches, electrical supplies and cooling water along with purge gas entry and exhaust ports are incorporated into each enclosure.
Fig. 7:. Glands for electrical, weld torch and water Fig. 8: Medium size standard enclosure showing feed through large entry zip, two sets of glove ports and a
posting port
ITAtube Journal No3/October 2018
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