Pipe Mills is useful enterprises that help in manufacturing pipe and tubing. These are used for various applications, such as electrical cable assembly, oil & gas, construction, petroleum refining, petrochemical, chemical, pharmaceutical, heating & power, communications, and others. They are also used in municipal road works and bridges, petroleum refineries, chemical plants, power plants, and others. The main manufacturing units in the industry are found in US, UK, China, Japan, Korea, and Philippines. Pipe Mills manufactures pipes and tubes of different shapes and sizes.
Pipe Mills uses a variety of technologies for enabling the seamless flow of desired products. They are generally manufactured in two ways – by hand or by machine. Hand-mills can work at higher speeds than machine ones. However, they are expensive and not suitable for large-scale operations. These are manufactured in pipe and tube mills through seamless or welding technology, based on the actual operating conditions.
In most cases, pipe and tube mills produce pipes and tubes of single diameter and larger. However, they are also capable of working with curved wall tubing as well. There are many different technologies that are used for the fabrication of these machines. The two most common types of welding process used by the tube and mill machinery is:
Straight Pipe – In this welding process, a wire is heated and then welded on to the flat or curved surface to be produced using heat energy. When this process is finished, the resulting product is in the form of a neat and clean slice. This is mainly used in the case of small pipe and tubes. The second common type of welding process is called ’ema’ welding. In this process, a wire is heated and then welded using the energy released during the welding process.
Longitudinally Welded Pipe – In this process, a piece of high-carbon stainless steel is fed into a machine called a mig welder. Then a gas shielding of varying compositions is supplied. The piece of stainless steel is then fed into the machine, which is turned on and burns the gas to form the weld. Afterward, the piece of stainless steel is fed into a table-top or longitudinally welded pipe mill to produce long and short pieces of pipe or tubes.
Flux Cored Mill – In this machine, a wire feed is first fed into a table-top torch. A wire-feed shield is then provided to prevent the weld puddle from forming. Once all the wire has been welded, the torch is turned off and the weld puddle is expelled through a tube. This type of mill is mostly used for industrial welding applications as it provides high quality welds at a low cost.