Manufacturing of stainless steel pipes & tubes commences with formation of welded mother pipes / tubes on custom designed sophisticated tube mills where stainless steel strips are slit to precise widths and are continuously set into a tubular shape and welded by Tungsten – Inert Gas (TIG) welding. The welding is highly precise and completely automated whereby the edges of the strips are headed and fused together under protective atmosphere of argon through a non-consumable electrode without the addition of any filler. Welding is continuously monitored by precision electronic devices to ensure perfect arc stability and direction in a magnetic field.
In the following sequence to welding, a continuous bead hammering / surface grinding is performed to smooth out weld bead and achieve perfect bore. The tube is then cut to desired length employing a flying cut off machine on the tube mill line.
Depending on the final tube sizes and specification, the tubes are then subiected to series of operations namely picking, coating, drawing, solution annealing in a continuous & temperature controlled furnace, final picking and passivation, followed by thorough inspection and dispatch.