Square tubes are classified according to their cross-sectional shapes: simple cross-section square tubes: square tubes and rectangular tubes. After the process is processed, it is rolled into strip steel. Generally, the strip steel is unpacked, flattened, crimped, and welded into a round tube, then the round tube is rolled into a square tube, and then cut to the required length. According to the production process, the square tube is divided into: hot-rolled seamless square tube, cold-drawn seamless square tube, extruded seamless square tube, and welded square tube. Rectangular pipes are divided into ultra-thick-walled rectangular pipes, thick-walled rectangular pipes and thin-walled rectangular pipes according to their wall thickness.

Item	Square pipe
Standard	ASTM, DIN, ISO, EN, JIS, GB, etc.
Material	Q195、Q215、Q235、Q345、Q355、S195T、GR.B、X42、X52、X60、CC60、CC70、ST35、ST52、S235JR、S355JR、SGP、STP G370、STP G410、GR12、GR2 etc.
Size	Wall thickness: 0.5mm-30mm, or as required. Outer diameter: 10mm-500mm, or as required. Length: 1m-12m, or as required.
Surface	Galvanized, 3PE, painting, coating oil, steel stamp, drilling, etc.
Application	Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural greenhouses, automobiles Industry, railway, highway guardrail, container frame, furniture, decoration, steel structure, etc.
Export to	America, Australia, Brazil, Canada, Peru, Iran, Italy, India, United Kingdom, Arab, etc.
Package	Standard export package, or as required.
Price term	EXW, FOB, CIF, CFR, CNF, etc.
Payment	T/T, L/C, Western Union, etc.
Certificates	ISO, SGS, BV.