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Z200-Z275 HDG Square Pipe 1.5-10mm Wall High Anti-Corrosion for Marine & Coastal Fencing

Our high-zinc galvanized square pipe features a square cross-section for exceptional structural stability and load-bearing capacity, outperforming round pipes in stress distribution and anti-deformation. With premium zinc coating, it delivers strong corrosion resistance, protecting the base steel from oxidation and extending service life while cutting maintenance costs. Precision-manufactured for accurate dimensions and neat right-angle corners, it boasts excellent workability for easy cutting, drilling and welding. Compliant with international standards, it’s highly versatile for outdoor construction, coastal engineering and structural framing projects.

  • 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 Carbon Square And Rectangular Tubes

Standard

ASTM/GB/JIS/EN Standard

GB/T6728-2002,GB/T6725-2002,GBT3094-2000,JG178-2005,ASTMA500,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 lengthin 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:Loosepacking,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,ine pipe

rrigation pipe
Handrail  pipe

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

3.0-14.0

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

  1. Exceptional structural stability is a hallmark of this product. Its rectangular cross-section design delivers superior performance under axial pressure, lateral loads and torsion. In comparison to circular pipes, it offers higher moment of inertia and section modulus in specific directions, enabling more effective resistance to bending and torsional deformation.
  2. It boasts outstanding corrosion resistance, with the surface zinc layer serving as the core protective component. Whether in harsh or normal atmospheric environments, the galvanized rectangular steel tube maintains long-term structural integrity and service performance, effectively extending its operational lifespan.
  3. Advanced production techniques ensure high dimensional precision of the tube. Deviations in side length, wall thickness, diagonal and other key dimensions are tightly controlled within minimal tolerances. Its four corners are precisely formed into right angles, resulting in a regular, straight and well-proportioned tube body.
  4. With standardized processing operations, the zinc layer’s structural integrity can be well preserved. The processed rectangular steel tube retains excellent corrosion resistance, bringing great convenience to on-site construction and custom fabrication work.
  5. Thanks to its unique structural features, superior corrosion resistance and excellent processability, this galvanized rectangular steel tube is widely applied across a diverse range of industries and fields.

Industries Using Ste

Industries Using Ste

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