Erw Stainless Steel Pipe - Prime Quality, Multi-electrode Tig Welded | High Ductility, Enhanced Corrosion Resistance, Solution Annealed

SWASTIK PIPES LTD with its extraordinary vision into future has started ERW stainless steel pipes production in 2008. Equipped with latest facilities, Swastik is committed to produce quality product in various sizes.

The Process commences with the formation of welded mother tube on the tube mill from prime quality stainless steel strips. The latest TIG multi electrode welding technique is employed for superior weld quality and 100% Fusion with argon purging, No filler metal added

These mother tubes are solution annealed at 1060 D 1100 D. C in continuous annealing furnace followed by immediate quenching to prevent chromium carbide precipitation

Annealing of mother tuber ensures:
* Removal of stress induced during tube forming and cold drawing:
* Sufficient ductility and softness for cold drawing:
* Transformation of the weld zone to austenitic nature,
* Re crystallization of metallic grains to original form and thereby improving corrosion resistance

During annealing, scales are formed on the surface of the tubes. In order to remove these, the tubes are pickled by immersing into hot pickling solution made of nitric acid, sulphuric acid hydrofluoric acid.