Square tube uses construction, machinery manufacturing, steel construction and other projects, shipbuilding, solar power bracket, steel structure Engineering, Electrical Control Quality Engineering, power plants, agricultural and chemical machinery, glass curtain wall, car chassis, airport, boiler construction, highway railing, housing construction, pressure vessel, oil storage tanks, bridges, power plant equipment, lifting transport machinery and other high load of welded structures and so on.
Wherein the welded pipe is divided into:
(a)according to the process points-arc welding square tube, resistance welding square tube (high frequency, low frequency), gas welding square tube, furnace welded square tube
(b)according to the weld points-straight seam welded pipe, spiral welded pipe
Square tube according to the material: carbon steel square tube, low alloy square tube.Carbon steel is divided into:Q195, Q215, Q235, SS400, 20 # steel, 45 # steel;low alloy steel is divided into Q345, 16Mn, Q390, ST52-3 and so on.
Square tube surface treatment points: hot-dip galvanized square tube, galvanized square tube, coated square tube, pickling square tube.
Square tube by use classification--decorative square tube, Machine Tool Equipment square tube, Machinery Industry square tube, chemical square tube, steel structure square tube, shipbuilding square tube, automobile square tube, steel beam column square tube, special purpose square tube.
