According to the production process, the square moment tube is divided into: hot rolled seamless square tube, cold drawn seamless square tube, extruded seamless square tube and welded seamless square tube.
The welded square pipe is also 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 line - straight seam welded square pipe, spiral welded square pipe.
Folded material classification
Square pipe by material: plain carbon steel square pipe, low alloy square pipe.
1. General carbon steel is divided into :Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.
2. Low alloy steels are divided into :Q345, 16Mn, Q390, st52-3, etc.
Folding production standard classification
According to the production standard, the square pipe is divided into: national standard square pipe, Japanese standard square pipe, British system square pipe, American standard square pipe, European standard square pipe and non-standard square pipe.
Folding section shape classification
Square pipes are classified by section shape:
1. Simple square pipe: square pipe and rectangular pipe.
2. Square pipe with complex section: square pipe with flower shape, square pipe with open shape, square pipe with corrugated shape and square pipe with special shape.
Folding surface treatment classification
The square pipe is divided into surface treatment: hot galvanized square pipe, electric galvanized square pipe, oil coated square pipe, pickling square pipe.
The square pipes are classified by purposes: square pipes for decoration, square pipes for machine tools, square pipes for mechanical industry, square pipes for chemical industry, square pipes for steel structure, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel girders and columns, square pipes for special purposes.
Folding wall thickness classification
The square moment tubes are classified according to the wall thickness: ultra thick wall square moment tubes, thick wall square moment tubes and thin wall square moment tubes.
Application: widely used in machinery manufacturing, construction, metallurgy industry, agricultural vehicles, agricultural greenhouses, automobile industry, railway, highway guardrail, container skeleton, furniture, decoration and steel structure fields.
Used in engineering building decoration, glass curtain wall, doors and Windows, steel structure, guardrail, machinery manufacturing, automobile manufacturing, electrical home appliances manufacturing, shipbuilding, container manufacturing, electricity, agricultural construction, agricultural greenhouse, bike rack, motorcycle frame, shelves, fitness equipment, leisure and tourism supplies, steel furniture, all kinds of specifications of the oil casing, tubing and line pipe, water, gas, water, air, heating and other fluid transport, fire and bracket, construction etc.
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