Pre Galvanized Square and Rectangular Pipes，pre-galvanized for superb corrosion resistance, suitable for diverse conditions. Square and rectangular forms ensure structural strength and wide application, like building frames, fences, industrial enclosures. With accurate dimensions and good workability, they enable easy installation and customization. The top choice for modern construction and manufacturing, offering durability and style.
| Standard | ASTM/ GB/ JIS/ EN Standard |
| Diameter | Square pipe: 10*10mm~600*600mm Rectangular pipe: 20*40mm~400*700mm |
| Length | Fixed length in 6-12m or as per specified |
Parameter of Pre-Galvanized Rectangular Tubes
| Standard | ASTM/ GB/ JIS/ EN Standard |
| GB/T6728-2002, GB/T6725-2002, GBT3094-2000, JG 178-2005, ASTM A500, JIS G3466, EN10210 etc. | |
| Diameter | Square pipe: 10*10mm~600*600mm Rectangular pipe: 20*40mm~400*700mm |
| Thickness | Square and rectangular pipe: 0.5~20mm |
| Length | Fixed length in 6-12m or as per specified |
| Standard | Hollow section: ASTM A500, EN10219, EN10210, JIS3466, GB/T 6728 |
| Material | Gr.A, Gr.B, Gr.C; S235, S275, S355; A36, SS400; Q195, Q235, Q345,etc. |
| Finish of pipe | Hot dipped galvanized with zinc 220~260g/m2;Pre-Galvanized with zinc 30~150g/m2 Painted with black/varnish lacquer; Oil on the surface to prevent rust; Bare pipe without painting: |
| Pipe End | Plain end/ Bevel end;Groove end;Joint with flange; Threaded on two ends, one end with coupling, one end with plastic cap |
| Marking | As per client requirement or mill standard Painting method: Spray white paint |
| Packing | OD not less than 273mm: Loose packing,piece by piece. OD less than 273mm: In hexagonal seaworthy bundles packed by steel strips. small sizes nested into big sizes. |
| Applications | Construction / building materials steel pipe Steel structure Scaffolding pipe Fence post steel pipe Fire protection steel pipe Greenhouse steel pipe Low pressure liquid, water, gas, oil, line pipe Irrigation pipe Handrail pipe |
| Techinical | ERW (high - frequency welded) |
| Rectangular Steel Pipe | |||||
| L1 (mm) | L2 (mm) | Thickness (mm) | L1 (mm) | L2 (mm) | Thickness (mm) |
| 18 | 10 | 0.4-0.8 | 150 | 80-100 | 3.0-14.0 |
| 20 | 8-14 | 0.4-2.0 | 160 | 80-130 | 5.0-16.0 |
| 25 | 12-20 | 0.5-1.5 | 175 | 100-150 | 5.0-20.0 |
| 30 | 10-20 | 0.5-2.5 | 180 | 80-150 | 3.0-20.0 |
| 38 | 25 | 0.7-1.5 | 200 | 80-160 | 3.0-20.0 |
| 40 | 10-30 | 0.7-3.75 | 220 | 120-200 | 3.0-25.0 |
| 45 | 20 | 1.5-4.0 | 250 | 100-225 | 4.0-25.0 |
| 50 | 10-40 | 0.6-4.0 | 260 | 90-175 | 6.0-25.0 |
| 60 | 20-40 | 0.6-5.0 | 280 | 120-240 | 6.0-25.0 |
| 70 | 20-50 | 1.0-6.0 | 300 | 100-250 | 4.0-24.0 |
| 75 | 50-45 | 2.0-8.0 | 310 | 210 | 7.0-25.0 |
| 80 | 40-60 | 0.7-0.8 | 320 | 200 | 7.0-25.0 |
| 90 | 50-60 | 2.0-8.0 | 350 | 150-300 | 7.0-25.0 |
| 100 | 20-80 | 1.0-9.0 | 360 | 200-350 | 7.0-25.0 |
| 110 | 60-75 | 3.0-10.0 | 400 | 150-300 | 7.0-25.0 |
| 120 | 60-100 | 3.0-14.0 | 450 | 150-350 | 7.0-25.0 |
| 125 | 90-100 | 3.0-143.0 | 450 | 150-350 | 7.0-25.0 |
| 130 | 120 | 3.0-14.0 | 600 | 200 | 8.0-25.0 |
| 140 | 80 | 3.0-10.0 | |||
The detailed specification of Pre galvanized hollow section:
| Square Hollow Section (SHS) | WT (mm) | Rectangular Hollow Section (RHS) | WT (mm) |
| 16*16 | 0.8-1.5 | 20*40 | 0.8-2.0 |
| 19*19 | 0.8-2.0 | 25*50 | 0.8-2.0 |
| 20*20 | 0.8-2.0 | 30*40 | 0.8-2.0 |
| 25*25 | 0.8-2.0 | 30*50 | 0.8-2.0 |
| 30*30 | 0.8-2.0 | 37*57 | 0.8-2.0 |
| 32*32 | 0.8-2.0 | 40*60 | 0.8-2.0 |
| 35*35 | 0.8-2.0 | 37*77 | 0.8-2.0 |
| 38*38 | 0.8-2.0 | 25*75 | 1.0-2.0 |
| 40*40 | 0.8-2.0 | 40*80 | 1.0-2.2 |
| 50*50 | 0.8-2.0 | 50*100 | 1.0-2.2 |
| 60*60 | 1.0-2.2 | 50*75 | 1.0-2.2 |
| 80*80 | 1.0-2.2 | 38*75 | 1.0-2.2 |
| 100*100 | 1.0-2.3 | 50*75 | 1.0-2.2 |
Features of Pre-Galvanized Rectangular Tubes
High structural stability. The design of the rectangular cross-section enables it to perform outstandingly when subjected to axial pressure, lateral loads, and torque. Compared with circular pipes, rectangular pipes can provide greater moments of inertia and section moduli in specific directions, thereby more effectively resisting bending and torsional deformations.
Have excellent anti-corrosion performance. The zinc layer on the surface is the key to its anti-corrosion. Whether in special environments or ordinary atmospheric environments, galvanized rectangular steel tubes can maintain structural integrity and service performance for a long time and extend the service life.
Advanced production processes ensure that galvanized rectangular steel tubes have high dimensional accuracy. The errors of dimensional parameters such as side lengths, wall thicknesses, and diagonal lengths are controlled within a very small range. The four corners are precisely right angles, and the tube body is regular and straight.
During the processing, as long as the operation is standardized, the integrity of the zinc layer can be well maintained. The processed rectangular steel tubes still have good anti-corrosion performance, which provides great convenience for on-site construction and customized processing.
Due to its unique structural characteristics, excellent anti-corrosion performance, and good processability, galvanized rectangular steel tubes are widely used in many industries and fields.
Industries Using Steel
