High Zinc Coating Z275 Galvanized Square Tube Q235B 20x20-200x200mm for Outdoor Construction
Parameter of Carbon Square And Rectangular Tubes
Our high zinc layer galvanized square tubes hold ISO 9001 quality certification and comply with EN 10219/ASTM A500 international standards, with third-party inspection reports available for all batches. Crafted from Q235B/Q355B high-quality steel via hot dip galvanizing, the Z200-Z275/Z350 zinc coating ensures uniform coverage and superior anti-corrosion. Sizes range 20x20-200x200mm with 1.5-10mm wall thickness, supporting custom cutting. Rigorous quality control throughout production guarantees high load-bearing capacity and durability, perfect for outdoor, coastal and marine engineering projects with strict quality requirements.
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Standard |
ASTM/GB/JIS/EN Standard |
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GB/T6728-2002,GB/T6725-2002,GBT3094-2000,JG 178-2005, ASTM A500,JIS G3466,EN10210 etc. |
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Grades |
Q195,Q215,Q235,Q345,S235JR,St37-2 |
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Sizes |
Thickness:0.5-20mm |
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Diameter:10x10mm to 600x600mm |
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Length:6m,9m,12m,or other length as request. |
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Surface |
Oiled,Black Painted or Hot Dip Galvanized |
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Packing |
strapped with steel strips to prevent damage from transportation,wrapped by PP cloth, |
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Applications |
Structure pipe in constructions,Low-pressure fluid service,Bridge,Highway,Windows of model steel door,Fence, Heating facilities etc. |
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Square Steel Pipe |
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L1 (mm) |
L2(mm) |
Thickness(mm) |
L1 (mm) |
L2(mm) |
Thickness(mm) |
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10 |
10 |
0.3-1.0 |
115 |
115 |
2.0-12.0 |
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12 |
12 |
0.3-1.0 |
120 |
120 |
2.0-16.0 |
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15 |
15 |
0.4-1.4 |
135 |
135 |
2.0-16.0 |
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10 |
10 |
0.5-1.5 |
140 |
140 |
2.0-18.0 |
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18 |
18 |
0.4-1.5 |
150 |
150 |
2.0-20.0 |
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20 |
20 |
0.5-2.0 |
160 |
160 |
3.0-20.0 |
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25 |
25 |
0.5-2.5 |
180 |
180 |
3.0-20.0 |
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28 |
28 |
0.5-1.5 |
200 |
200 |
4.0-22.0 |
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30 |
30 |
0.5-4.0 |
220 |
220 |
4.0-22.0 |
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35 |
35 |
0.6-1.8 |
240 |
240 |
4.0-22.0 |
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40 |
40 |
0.6-6.0 |
250 |
250 |
4.0-22.0 |
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50 |
50 |
07-6.0 |
260 |
260 |
4.0-25.0 |
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60 |
60 |
0.7-6.0 |
280 |
280 |
6.0-25.0 |
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70 |
70 |
0.9-6.0 |
300 |
300 |
6.0-25.0 |
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75 |
75 |
1.0-7.5 |
350 |
350 |
6.0-25.0 |
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80 |
80 |
1.0-8.0 |
400 |
400 |
6.0-25.0 |
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90 |
90 |
2.0-10.0 |
500 |
500 |
6.0-25.0 |
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100 |
100 |
1.5-12.0 |
600 |
600 |
6.0-25.0 |
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110 |
110 |
2.0-12.0 |
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Features of GI Square Tubes
- A square cross-section gives the galvanized square pipe superior structural stability and load-bearing capacity. Unlike circular pipes, it distributes stress more effectively under axial pressure and lateral loads, significantly reducing the risk of bending deformation.
- The surface zinc coating provides robust anti-corrosion protection, effectively shielding the pipe’s base material from oxidation and corrosion. This allows the galvanized square pipe to maintain optimal performance over a long service life, extending its durability and lowering maintenance and replacement costs.
- Advanced manufacturing techniques ensure high dimensional precision in the pipe’s side length, wall thickness and other key parameters. Additionally, its four corners are precisely formed into right angles, delivering a neat, uniform and well-defined profile.
- This carbon steel galvanized square pipe features excellent workability, enabling easy cutting, drilling, welding and bending processes. It can be flexibly fabricated to meet custom design specifications, offering great versatility for a wide range of engineering applications.
Industries Using Ste
