| Product | Square and Rectangular Steel Pipe | |
| Material | Carbon Steel | |
| Grade | Q195 = S195 / A53 Grade A Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2 Q355 = S355JR / A500 Grade B Grade C |
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| Standard | DIN 2440, ISO 65, EN10219, GB/T 6728, JIS 3466, ASTM A53, A500, A36 |
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| Surface | Bare/Natural Black
Painted Oiled with or without wrapped |
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| Ends | Plain ends | |
| Specification | OD: 20*20-500*500mm ; 20*40-300*500mm
Thickness: 1.0-30.0mm Length: 2-12m |
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The direct square forming process involves bending the strip steel from the first unit, and through step-by-step extrusion and bending, the basic shape of the product is formed before welding. This process is commonly used in the production of square and rectangular steel pipes to meet specific structural and design requirements. The direct square forming process requires specialized equipment and technology to ensure the dimensional accuracy and structural strength of the products.
Strict Quality Control:
1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random.
2) National accredited laboratory with CNAS certificates
3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV.
4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC, CE certificates