Selling Factory Square Tube 130x130 Square Tube 38x38 Square Tube

Square pipe is a name for square pipe and rectangular pipe, that is, steel pipe with equal and unequal side length.  It is made of rolled strip steel after process treatment.  Generally the strip steel is unpacked, leveled, crimped and welded to form a round pipe, then rolled into a square pipe from the round pipe, and then cut into the required length.  Application fields: widely used in machinery manufacturing, construction industry, metallurgical industry, agricultural vehicles, agricultural greenhouses, automobile industry, railway,highway guardrail, container skeleton, furniture, decoration and steel structure. 
For engineering construction, glass curtain wall, door and window decoration, steel structure, guardrail, machinery manufacturing, automobile manufacturing, household appliance manufacturing, shipbuilding, container manufacturing, electric power, agricultural construction, agricultural greenhouse, bicycle frame, motorcycle frame, shelf, fitness equipment, leisure and tourism products, steel furniture, various specifications of oil casing, oil pipe and pipeline pipe, water, gas, sewage Air,  heating and other fluid transportation, fire fighting and support, construction industry, etc.