Pipe Manufacturing Process

What is Pipe Manufacturing Process?

BST Pipes are made from HR Coils Manufactured & supplied by SAIL / JSW / ESSAR / BHUSHAN / TATA . After being longitudinally slitted & edge preparation, the strip is progressively formed into a circular shape by passing it through a series of forming rolls.

Continuous welding is carried out by a high frequency induction welding machine, and the seam is formed by fusing the edges without any filler metal. The weld bead reinforcement (inside), is removed, if needed. The welded pipe, after cooling, are cut in appropriate length after attaining its roundness and specified outside diameter.

The pipes are conveyed to the finishing bay for testing and inspection. Hydrotesting of pipes is undertaken to detect leaks prior to galvanizing and threading. The pipes are subsequently galvanized / black varnised / threaded as per specification / client requirement.