Hot rolled/cold rolled close annealed strips procured from indigenous as well as import sources are used in the manufacture of tubes depending on end applications. Separate in-group cold rolling mills also cater to raw material requirements of bright tubings.

Manufacturing begins in a separate preparatory section where the initial raw materials are slit into required tube widths.

Each of the tube mills has its own design specialties so that our wide range of products such as bright finish tubes, high tensile strength tubes, sectional tubes, etc. are produced to the close precision required by our customers.

In the tube mills, the tube is welded by high frequency welding process: The induction coil encircles the strip which is formed into a tubular section by its progressive movement through set of specially designed rolls. The butted ends of the tube are welded without any filler by electric resistance welding, which results in a close and tight weld-joint, free from inclusions and other defects maintaining the parent material integrity. The final rolls situated towards the end of the tube mill ensure straightening and sizing of tubes.

Sectional tubes of rectangular or square sections may be achieved through specially designed, contoured rolls. Cutting machines installed on the tube mill cut length with close tolerance while in operation. The ERW precision tubes thus produced are collected in the turn-table.

For special applications, the tubes are required to undergo a series of additional processes like annealing pressure testing, eddy current testing, straightening or further cutting as per customer's requirements.