Roll Bending Pipe Manufacturing Plant

Roll Bending – Large Diameter Pipe Excellence

The roll bending plant of … operates in a covered facility measuring 413×60 meters, with covered storage (220×30 meters) and open yard (413×160 meters).

The plant produces large-diameter straight seam welded steel pipes with diameters from 20 to 64 inches, wall thickness from 7 to 31.8 mm, and lengths from 6 to 12.2 meters.

Standards: API 5L, AWWA C200, ISO 3183
Annual Capacity: 675,000 tons
Machinery: Hasler, Switzerland

Production Process

1. Plate Preparation – Longitudinal edges are milled.
2. Forming with 3-Roll Bending Machine – Plates shaped into open-seam pipes.
3. Post-Bending – Edges aligned for welding.
4. Root Weld and SAW Completion – Inside and outside seams welded.
5. Expansion – Diameter increased by up to 1.5% for roundness and mechanical properties.
6. Beveling – Ends prepared for field welding.
7. Quality Control – Dimensional checks, visual inspection, UT, fluoroscopy, MT, and hydrostatic testing.