Seamless Pipes

Hot Finished Pipes & Tubes

Hot Finished Seamless (HFS) as differentiated from Cold Drawn Seamless (CDS) pipes and tubes are made by heating a solid billet or bloom and then punching or piercing it to make a hollow out of it. This hollow is subsequently passed through one or multiple stands with or without a tool inside to give it the final pipe or tube dimensions.

It is possible to manufacture large diameter and thick pipes of various grades in high volume through the HFS process. With the improvement in technology, HFS pipes & tubes now come with close dimensional tolerance & good surface finish.

Cold Pilgered / Cold Drawn Tubes

Cold Drawn Seamless (CDS) as implied is made by cold drawing a larger mother seamless pipe, which is generally manufactured through a HFS process. In the CDS process, the mother pipe is pulled through a die & plug in cold without any heating. Because of the tool on outside and inside the surface and tolerances are better in CDS. While this is an additional process over HFS, it is necessary to get smaller size pipes which otherwise cannot be manufactured in HFS. Some applications which require close tolerances and smooth surfaces also specify the requirements to be necessarily CDS. CDS pipes & tubes are extensively used in Heat-Exchanger, Bearing & Automotive sectors.

Boiler Tubes

Boiler has played an important role in the modern world from the early days of industrial revolution. Now-a-days boilers are widely used by Utility, Industrial, Commercial & Institutional sectors for heating and power generation. With the ever increasing demand for power, the requirements of utility boilers have gone up manifold in recent years. Tubes & pipes form the major part of any boiler in various applications like economizer, super-heater & headers. Size, grade, quantity of tubes & pipes depend on the design of the boiler which is based on fuel, temperature, pressure & volume of steam-flow. There is also continuous efforts to increase the efficiency of the boiler. With the demand for high capacity & high efficiency boilers, the demand for higher grade tubes & pipes have increased substantially.