Gnee Steel (Tianjin) Co., Ltd.

enLanguage
8615824687445
beam@gneesteel.com

High Quality Galvanized Square Pipe Rectangular Tube Gi Steel for Construction

Aug 13, 2025

Leave a message

info-1124-535

Dimensions Table
Specification Zinc layer Material
0.20*1000*C 80 DX51D+Z
0.25*1000*C 80 DX51D+Z
0.3*1000*C 80 DX51D+Z
0.35*1000*C 80 DX51D+Z
0.4*1000*C 80 DX51D+Z
0.5*1000*C 80 S280GD+Z
0.5*1000*C 80 DX51D+Z
0.58*1000*C 80 S350GD+Z
0.6*1000*C 80 DX51D+Z
0.7*1000*C 80 DX51D+Z
0.75*1000*C 80 DX51D+Z
0.8*1000*C 80 DX51D+Z
0.8*1000*C 80 DX53D+Z
0.85*1000*C 80 DX51D+Z
0.9*1000*C 80 DX51D+Z
0.98*1000*C 80 DX51D+Z
0.95*1000*C 80 DX51D+Z
1.0*1000*C 80 DX51D+Z
1.1*1000*C 80 DX51D+Z
1.2*1000*C 80 DX51D+Z
1.2*1050*C 150 CSB
1.4*1000*C 80 DX51D+Z
1.5*1000*C 80 DX51D+Z
1.55*1000*C 180 S280GD+Z
1.55*1000*C 180 S350GD+Z
1.6*1000*C 80 DX51D+Z
1.8*1000*C 80 DX51D+Z
1.9*1000*C 80 DX51D+Z
1.95*1000*C 180 S350GD
1.98*1000*C 80 DX51D+Z
1.95*1000*C 180 S320GD+Z
1.95*1000*C 180 S280GD+Z
1.95*1000*C 275 S350GD+Z
2.0*1000*C 80 DX51D+Z
0.36*1250*C 80  
0.4*1250*C 80 DX51D+Z
0.42*1250*C 80 DX51D+Z
0.45*1250*C 225 S280GD+Z
0.47*1250*C 225 S280GD+Z
0.5*1250*C 80 SGCC
0.55*1250*C 180 S280GD+Z
0.55*1250*C 225 S280GD+Z
0.6*1250*C 80 DX51D+Z
0.65*1250*C 180 DX51D+Z
0.7*1250*C 80 DX51D+Z
0.7*1250*C 80 SGCC
0.75*1250*C 80 DX51D+Z
0.8*1250*C 80 DX51D+Z
0.9*1250*C 80 DX51D+Z
0.95*1250*C 80 DX51D+Z
1.0*1250*C 80 DX51D+Z
1.15*1250*C 80 DX51D+Z
1.1*1250*C 80 DX51D+Z
1.2*1250*C 80 DX51D+Z
1.35*1250*C 80 DX51D+Z
1.4*1250*C 80 DX51D+Z
1.5*1250*C 80 DX51D+Z
1.55*1250*C 80 DX51D+Z
1.6*1250*C 120 SGCC
1.6*1250*C 80 DX51D+Z
1.8*1250*C 80 DX51D+Z
1.85*1250*C 90 DX51D+Z
1.95*1250*C 80 DX51D+Z
1.75*1250*C 80 DX51D+Z
2.0*1250*C 80 DX51D+Z
2.0*1250*C 120 SGCC
2.5*1250*C 80

DX51D+Z

 

 1.Why would you want to paint over galvanized steel?

Called duplex coatings, zinc and paint in combination (synergistic effect) produce a corrosion protection approximately 2X the sum of the corrosion protection that each alone would provide. Additionally, duplex coatings make for easy repainting, excellent safety marking systems, and good color-coding. Painting over galvanized steel that has been in service for many years also extends the life of the zinc coating.

 

2.Is galvanizing more expensive than paint?

Depending on the product mix, square feet per ton, and condition of the steel surface, galvanizing is often less expensive on an initial cost basis. However, as with any purchase, the lifetime costs should be considered when making a project decision on the corrosion prevention system to utilize. And, with galvanizing, the life cycle cost, i.e. the cost per year to maintain, is almost always less than a paint system. Paint systems require maintenance, partial repainting and full repainting several times over a 30-year project life. The costs can be staggering, making the decision to paint a costly one in the long run.

 

3.How long will hot-dip galvanizing protect my steel from corrosion?

The corrosion rate of zinc and how long it will provide protection is a function of the coating thickness and the amount of corrosive elements in the atmosphere. For example, in rural settings where there is less automotive/truck exhaust and plant emissions, galvanized steel can easily last for 100 – 150 years without maintenance. Industrial and marine locations contain significantly more aggressive corrosion elements such as chlorides and sulfides and galvanized steel may last for 50 – 100 years in those cases. The relationship between coating thickness and atmospheric conditions is contained in a popular graph developed by the AGA. Please see the publication Hot-Dip Galvanizing for Corrosion Protection: A Specifier’s Guide on this web site.

 

4.What are the size limitations of steel that is to be galvanized?

The hot-dip galvanizing process can accommodate various different shapes and sizes of steel. Kettle sizes vary in dimensions from one galvanizer to the next. You can view the online listing of all the galvanizers in North America and their kettle sizes.

 

5.What types of products can be galvanized?

Numerous different fabrications for a variety of applications are galvanized each year. To view a list of the different types of products that have been hot-dip galvanized click here.