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.

Weldability refers to the difficulty of obtaining excellent welded joints for welded pipes under the conditions of certain welding processes, including welding methods, welding materials, welding specifications and welding structures.

Spatter is the metal that flies out of the molten pool during the welding process of seamless pipes. Splashes are easy to scratch seamless pipes, pollute the protective glasses of welding helmets, pollute the filters and frosted glass of equipment cameras, etc.