Galvanized pipes are divided into two types: hot-dip galvanizing and electric galvanizing. Hot-dip galvanizing has a thick galvanized layer, which has the advantages of uniform coating, strong adhesion, and long service life. The cost of electro-galvanizing is low, the surface is not very smooth, and its corrosion resistance is much worse than that of hot-dip galvanized pipes.

The drill pipe is a steel pipe with threads at the end, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or the bottom hole device at the bottom of the drilling well.

Petroleum cracking seamless steel pipe is a seamless steel pipe suitable for pressure pipelines such as petroleum and chemical furnace tubes, refining and chemical equipment, cracking equipment, hydrogenation equipment, and heat exchangers.

Pressure piping refers to all piping subjected to internal or external pressure, regardless of the medium in the pipe. A pressure pipe is a part of a pipeline that is used to convey, distribute, mix, separate, discharge, meter, control and stop fluid flow. An assembly consisting of pipes, fittings, flanges, bolted connections, gaskets, valves, other components or pressure parts and supports.

Compared with other pipes, large-diameter plastic-coated steel pipes have smooth walls, good drainage performance, small fluid resistance, and no scaling, which can greatly reduce losses. At the same time, the linear expansion coefficient of the large-diameter plastic-coated pipe is very small, which makes it very beneficial as the main water delivery pipe, and greatly overcomes the defects of the large linear expansion coefficient of other common pipes. Large-diameter plastic-coated steel pipes are cost-effective products upgraded from traditional seamless pipes and galvanized pipes.

The weld seam of the high-frequency electric resistance welded pipe (ERW pipe) is formed by melting the base material of the steel strip body, and its mechanical strength is better than that of ordinary welded pipes. Smooth appearance, high precision, low cost and small weld reinforcement, which is beneficial to the coating of 3PE anti-corrosion coating.