October 14, 2022
Process classification
Square tube according to the production process: hot rolled seamless square tube, cold drawn seamless square tube, extruded seamless square tube, welded square tube.
The welded square pipe is divided into
1, according to the process - arc welding square pipe, resistance welding square pipe (high frequency, low frequency), gas welding square pipe, furnace welding square pipe
2. According to the weld, it is divided into straight seam welded square pipe and spiral welded square pipe.
The material classification
Square pipe according to material: general carbon steel square pipe, low alloy square pipe.
1, general carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel and so on.
2, low alloy steel is divided into: Q345, 16Mn, Q390, ST52-3 and so on.
Classification of production standards
According to the production standard, the square tube is divided into: national standard square tube, Japanese standard square tube, British system square tube, American standard square tube, European standard square tube, non-standard square tube.
Section shape classification
Square pipes are classified by section shape:
1, simple section square tube: square tube, rectangular square tube.
2, complex section square tube: flower shaped square tube, open shaped square tube, corrugated square tube, special shaped square tube.
Surface treatment classification
Square pipe according to surface treatment: hot dip galvanized square pipe, electric galvanized square pipe, oil coated square pipe, pickling square pipe.
Use classification
The square pipes are classified by use: decorative square pipes, machine tool and equipment square pipes, machinery industry square pipes, chemical square pipes, steel structure square pipes, shipbuilding square pipes, automobile square pipes, steel beam and column square pipes, special purpose square pipes.
Classification of wall thickness
Square rectangular tube according to the wall thickness classification: super thick wall square rectangular tube, thick wall square rectangular tube and thin wall square rectangular tube.
