Introduction of square/rectangular steel pipe


Square/rectangular steel pipe is with equal or unequal length of sides, is made of steel strip by coiling after processing. Generally, steel strip is unpacked, flattened, coiled, welded to form a circular pipe, then rolled into a square pipe from the circular pipe and cut into the required length.


It is widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural greenhouse, automobile industry, railway, highway guardrail, container skeleton, furniture, decoration, steel structure, doors and windows decoration, machinery manufacturing, automobile manufacturing, household appliances manufacturing, shipbuilding, container manufacturing, power, agricultural construction, agricultural greenhouse, bicycle frame, motorcycle rack, shelf, fitness equipment. Material, leisure and tourism supplies, steel furniture, etc.


  • ASTM A500 — Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
  • EN 10219 — Cold formed welded structural hollow sections of non-alloy and fine grain steels

Common Sizes:

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