Square tube is a kind of square tube with good corrosion resistance and good effect, which has been loved by many users. With the continuous progress of manufacturing technology and the increase of people's demand, there are many different categories of the product. So you know what? Let the small editor of Jinan square tube manufacturer take you to have a brief understanding.
1. Process classification
Square tubes are divided into hot-rolled seamless square tubes, cold drawn seamless square tubes, extruded seamless square tubes and welded square tubes according to the production process.
The welded square pipe is divided into:
(a) According to the process, it is divided into arc welding square tube, resistance welding square tube (high frequency and low frequency), gas welding square tube and furnace welding square tube.
(b) According to the weld - straight welded square pipe and spiral welded square pipe.
2. Material classification
Square tubes are divided into ordinary carbon steel square tubes and low alloy square tubes according to material. Ordinary carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc; Low alloy steels are divided into Q345, 16Mn, Q390, St52-3, etc.
3. Production standard classification
Square tubes are divided into national standard square tubes, Japanese standard square tubes, British standard square tubes, American standard square tubes, European standard square tubes and non-standard square tubes according to production standards.
4. Section shape classification
Square pipes are classified according to section shape:
(1) Simple section square tube - square tube, rectangular tube.
(2) Square pipe with complex section - flower shaped square pipe, open square pipe, corrugated square pipe and special-shaped square pipe.
5. Classification of surface treatment
Square pipes are divided into hot-dip galvanized square pipes, electro galvanized square pipes, oiled square pipes and pickled square pipes according to surface treatment.
6. Use classification
Square tubes are classified by purpose - square tubes for decoration, square tubes for machine tool equipment, square tubes for mechanical industry, square tubes for chemical industry, square tubes for steel structure, square tubes for shipbuilding, square tubes for automobile, square tubes for steel beams and columns, and square tubes for special purposes.
7. Wall thickness classification
Square tubes are classified according to wall thickness - super thick wall square tubes, thick wall square tubes and thin wall square tubes.