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Spiral welded
tube & pipe is manufactured from stainless and mild steel hot or cold
rolled coil strip. The coil is loaded on a mandrel from which it is
decoiled, flattened, edged trimmed. The strip is guided into a forming
station at a predetermined
angle and spiralled to produce a cylindrical hollow ensuring proper
welding gap between abutting edges.
The diameter of the tube or pipe is determined by altering the angle of
the coil
strip feed entering the spiral weld mill and welded.
The strip is welded internally and externally either by M.I.G. or T.I.G.
or Sub-arc depending on the steel and the ultimate end use requirement of
the tube or pipe
and cut to a predetermined length using a automatic cutting off device.
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