Seamless steel pipes have hollow cross-sections and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water and certain solid materials.

Seamless steel pipe is a round, square, or rectangular steel with a hollow section and no seams around it. Seamless steel pipes are made of steel ingots or solid tube blanks that are perforated into capillary tubes, and then made by hot rolling, cold rolling or cold drawing.

Seamless steel pipe is a pipeline widely used to transport fluids, such as natural gas, oil, and water pipelines.Seamless steel pipes can be divided into hot-rolled seamless steel pipes and cold-rolled seamless steel pipes. Hot-rolled seamless steel pipes are also called general steel pipes, which can be divided into low and medium pressure boiler steel pipes.

Oil casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after the drilling process and completion. Each well uses several layers of casing according to different drilling depths and geological conditions.

Straight seam steel pipe is a welded steel pipe in which the weld seam is parallel to the longitudinal direction of the steel pipe. According to the production process, it can be divided into ERW steel pipe and LSAW steel pipe. The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is rapid.

Continuous seamless oil pipe is a new type of oil steel pipe with a single length of several thousand meters that can be bent repeatedly and achieve multiple plastic deformations. Continuous seamless tubing and its operating equipment are called "universal working machines".