Hi-Tech Pipes, an ISO 9001 company. It excels as a reputed manufacturing unit of flat and tubular products. The company is a renowned manufacturer and exporter of corrugated sheets, gc sheets, corrugated steel sheets, ERW tubes, steel galvanised coil, CRCA coils and sheets and galvanised products.

Slitting

HR Coils are slitted to predetermined widths for each size of pipes.

Uncoiling, End Shearing And Welding

Slitted coil is uncoiled at the entry of ERW mill and the ends are sheared and welded one after another to make it a single endless strip.

Forming

Slitted coils are initially formed into U shape and then into a cylindrical shape with open edges using a series of forming rolls.

Welding

The open edges are heated to the forging temperature through high frequency low voltage high current and press welded by forge rolls making perfect and strong but weld without filler materials.

Debeading

Weld flash on top and inside (if needed) is trimmed out through carbide tools.

Seam Annealing

Whenever required, welding portion and heat affected zone is put to normalising and then cooled down in air cooling bed.

Sizing

After water quenching, slight reduction is applied to pipes with sizing rolls to give them desired accurate outside diameter.

Cutting

Pipes are cut to required lengths by flying cut off disc/saw cutter.

End Facing And Bevelling

The pipes ends are faced and bevelled by the end facer.

All the processes are continuous with auto arrangements. These plain ended tubes go for further processing as per the customer need like galvanizing, threading, black varnishing etc.

Manufacturing and Testing Flow Diagram of High Frequency Induction Welded / Electric Resistance Welded Black and Galvanised Pipes / Tubes