Classification Of Square And Rectangular Tube

Process classification

According to the production process, the square and rectangular pipe is divided into hot-rolled seamless square pipes, cold-drawn seamless square pipes, extruded seamless square pipes, and welded square pipes.

Among them, the welded square tube is divided into

1. According to the process - arc welded square tube, resistance welded square tube (high frequency, low frequency), gas welded square tube, furnace welded square tube.

2. According to the welding seam - straight seam welded square tube, spiral welded square tube.

Material classification

The square and rectangular tube is divided into ordinary carbon steel square and rectangular tubes, and low alloy square and rectangular tubes.

1. Common carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.

2. Low alloy steel is divided into: Q345, 16Mn, Q390, ST52-3, etc.

Production Standard Classification

According to the production standard, the square and rectangular tube is divided into national standard square tube, Japanese standard square tube, British standard square tube, American standard square tube, European standard square tube, and non-standard square tube.

Section shape classification

Square tubes are classified by section shape:

1. Simple section square tube: square tube, rectangular square tube.

2. Square and rectangular tubes with complex sections: flower-shaped square tubes, open-shaped square tubes, corrugated square tubes, and special-shaped square tubes.

Surface treatment classification

According to the surface treatment, the square pipe is divided into hot-dip galvanized square pipe, electro-galvanized square pipe, oiled square pipe, and pickling square pipe.

Category of use

Square pipes are classified by use: square pipes for decoration, square pipes for machine tools, square pipes for the machinery industry, square pipes for the chemical industry, square pipes for steel structures, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel beams and columns, Special purpose square tube.

Wall Thickness Classification

Square and rectangular tubes are classified by wall thickness: ultra-thick-walled rectangular tubes, thick-walled rectangular tubes, and thin-walled rectangular tubes.