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".

Large-diameter steel pipes are steel pipes with an outer diameter of 1000MM or more. Large-diameter steel pipes are mainly completed by tension reduction and continuous rolling of hollow base metals without mandrels. On the premise of determining the welded steel pipe, the whole welded steel pipe is heated to a high temperature above 950°C, and then rolled into seamless steel pipes of various specifications through a tension reducing machine.

Welded pipes can be divided into carbon steel welded pipes and stainless steel welded pipes in terms of material. Carbon steel welded pipe can also be called carbon welded steel pipe, and carbon steel can also be called magnet alloy steel.

Galvanized degaussing steel pipe is used as a material for pre-embedded threading in subways, high-speed rail stations, civil air defense construction, and high-voltage substations. It has a wide range of applications. Degaussing steel pipes can effectively prevent signal loss caused by wires and cables passing through pipes.

The galvanized square tube is a hollow steel tube with a square cross-section shape and size made of hot-rolled or cold-rolled galvanized strip steel or galvanized coil as a blank, which is formed by cold bending and then high-frequency welding.