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Distinguish hot-rolled steel pipe,welded steel pipe and cold-formed steel pipe from the appearance

Hot-rolled steel pipe: It is relative to cold rolling, cold rolling is rolling below the recrystallization temperature, and hot rolling is rolling above the recrystallization temperature.

Welded steel pipe: refers to a steel pipe with seams on the surface that is welded into a round or square shape with steel strips or steel plates. The billet used for welded steel pipe is steel plate or strip steel.



Cold-formed steel pipe: There are seamless and welded seams. Seamless square pipe is formed by extruding seamless round pipe. Steel sheet piles refer to steel materials used in bank protection works, mining works, and building foundation works. Steel sheet piles mainly include thin sheet piles, combined supporting piles and tubular supporting piles. Taian Kono Section Steel Co., Ltd. specializes in the production of square pipes, sheet piles, high frequency welded pipes, precision welded pipes, cold-rolled strip steel, C-shaped steel, construction shelf pipes, oval pipes, special-shaped pipes, and cold-formed hollow sections.

Seamless steel pipes are divided into two types: hot-rolled and cold-drawn seamless steel pipes. Hot rolled steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. Cold drawn seamless steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes, alloy thin-walled steel pipes, and stainless steel pipes. Wall steel pipe, special-shaped steel pipe.
 

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