Process for assembling piping or components by TIG welding

Abstract

A process to avoid or limit corrosion at the junction of two piping comprising devices welded together, said piping comprising devices being adapted to flow corrosive gases through them, said process comprising the steps of: a) providing a first piping comprising device and connecting it to an inert gas source; b) purging it with an inert gas comprising substantially not more than 10 ppb of an oxidizing gas selected from the group consisting of oxygen, carbon dioxide, water vapor or mixtures thereof, said inert gas flowing from a first opening to a second opening of said piping comprising device; c) providing a second pipe comprising device in flow communication with the first one, while continuing to purge the first piping comprising device; d) welding the two piping comprising devices, said welding being carried out under an inert gas atmosphere; and e) repeating steps c and d if necessary.

Dependencies are inferred from the claim text.