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Process |
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Pipes and tubes are manufactured
from mild strips slitted from Hot Rolled Low carbon Steel Coils
conforming to BS 1387: (1985), BS21: (1985), ASTM A53 (2002)
and PS 1851: (1987) standards.
 The
strip passes through a series of drive forming and fin rolls
and takes the required closed shaped and is welded continuously
by page of an electric current of high frequency i.e. 4, 50,
000 cycles/second across the edges.
The pipes and tubes thus formed and welded pass through the
sizing section where the pipes are allowed to pass in round
shape while tubes are given the required shapes by passing them
through a series of dies and finally dimensional deviations
if any are corrected before the pipes or tubes are cut into
required length by automatic cutting machine.
The pipes and tubes are then end faced and pressure tested.
Thereafter protective surface finishing operations such as hot
dip Galvanizing or varnishing is done as per specific requirements.
The tubes are offered as plain, beveled, threaded ends or white
flange. |
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