Straight seam pipe is a kind of welded steel pipe, which refers to the steel pipe whose weld seam is parallel to the longitudinal direction of the steel pipe. The seam pipe is formed by rolling a long steel strip of a certain specification through a high-frequency welding unit and welding it with a straight seam. The specification of the straight seam pipe is represented by the nominal diameter, and can be divided into two types: thin-wall straight seam pipe and thick-wall straight seam pipe according to the wall thickness. According to the shape, it can be divided into round, square or special-shaped tubes.

The boiler tube is a seamless tube. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel types used in the manufacture of steel pipes. According to the operating temperature, it can be divided into general boiler tubes and high-pressure boiler tubes.

Spiral seam submerged arc welded steel pipe (SSAW) refers to a metal pipe with a spiral seam welded by submerged arc welding process. Widely used in water supply engineering, petrochemical industry (such as octg casing), chemical industry, electric power industry, agricultural irrigation, urban construction,

The main purpose of alloy steel pipe is to be used in high-pressure and high-temperature pipelines and equipment such as power plants, nuclear power plants, high-pressure boilers, high-temperature superheaters and reheaters. It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel.

Seamless steel pipe is an important type of steel pipe in production and life, and is an important and durable steel in steel pipes. Seamless steel pipes also encounter bending deformation during use. When the seamless steel pipe is bent and deformed, as long as it can be corrected, the seamless steel pipe can continue to be used, otherwise the seamless steel pipe will affect its use. The curvature of the seamless steel pipe can also be controlled, and it should be controlled from the following aspects:

Fluid pipes are pipes (mostly seamless steel pipes) that are specially used to transport media with fluid properties. The media with fluid properties, in addition to liquid media such as water, oil, solution, etc., solid media such as cement, grain, coal powder, etc., can also flow under certain conditions. Fluid pipes can be made of steel, non-ferrous metals such as copper and titanium, or even non-metallic materials such as plastics.