The Art of Processing
Hot-rolled
or cold - rolled close annealed strips from indigenous as well as import
source are used in the manufacture of tubes depending and applications.Manufacturing begins in a separate preparatory section where the initial raw material are slit into required tube widths. Then they are processed through the modern, strip-pickling plant to removal all surface defects before feeding into the tube mills.
Mill has its won 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 mill, the tube is welded by the high frequency Solid State welding process.
The induction coil encircles the strip which is formed into a tubular section by its progressive movement through sets 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.
Quality
Assurance begins at the raw material stage itself. Material is inspected for
chemical composition and tested for other parameters like mechanical
properties, guage variation etc. for a total evaluation of the raw material
to ascertain its suitability for the intended end - use applications. At the
surface - pickling operations, the material is checked for surface finish
before its is fed into the tube mills.
