Seamless line pipe is OCTG pipelines used for transportation of crude oil and natural gas from the rig field to the oil refineries and storage facilities. They are also useful for transportation to the different shipment and distribution points. As the name suggests, Seamless pipe is pipe without a seam or welded joint. In welded pipe, the joint where the pipe is welded is the weakest part, whereby limiting the strength of the pipe. Since Seamless pipe does not have any welded joints, they have a uniform structure and strength. They can endure and hold up against high pressure, high temperature and high mechanical stress. They are corrosive resistant in nature, making them ideal for use in the Oil, Gas and Petroleum industry.
Seamless line pipe is manufactured by heating cylindrical bars of steel at very high temperatures. When the pipe reaches the required temperature and becomes red hot, they are pierced with a probe for creating the required size holes into it. After the hole is pierced, the red hot cylindrical bar is then processed on rollers for acquiring the required wall thickness and diameter.