Galvanized Round Tubing | GI Round Steel Tube for Sale

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Galvanized Round Tubing

Galvanized round tubing is a kind of steel pipe with a circular cross-section. It is more durable than carbon steel tubes but more cost-effective than stainless tubes. Besides, round tubing has one continuous surface with no edges, which makes it more resistant to flexing and torsional twisting under weight and pressure. It is commonly used for transporting fluid, such as oil, water, gas, etc. Wanzhi Steel offers a wide range of galvanized steel tubes in a variety of sizes to better meet your needs. Welcome to contact us for more details!

Galvanized Round Steel Tubing

Galvanized Round Steel Tubing

Galvanized Round Tube

GI Round Tube

Galvanized Round Tubes

Galvanized Round Tubes

Galvanized Steel Round Tubing Sizes

Specification External Diameter (mm) Wall Thickness (mm)
DN15 21.3 1.8-2.8
DN20 26.9 1.8-2.8
DN25 33.7 1.8-3.25
DN32 42.4 1.8-3.5
DN40 48.3 1.8-3.5
DN50 60.3 1.8-3.8
DN65 76.1 2.2-3.8
DN80 88.9 2.2-4.0
DN100 114.3 2.0-4.25
DN125 140 2.5-4.5
DN150 168.3 2.5-4.5
DN200 219.1 2.75-6.0

How to Calculate Weight of Galvanized Round Tubing?

You can estimate the theoretical weight of your galvanized round tubing with the following formula:

(Outer Diameter (mm) – Wall Thickness) * Thickness(mm) * Length(m) * 0.02466*1.0599= (kg/pcs)

For example, if your galvanised steel round tube is 21.3 mm in external diameter, 2.8 mm in thickness, 6 m in length, the weight of each piece will be ((21.3-2.8)*2.8*6*0.02466*1.0599 ≈8.123 kg/pcs ). If you order 3000 pieces, the total weight is about 24 tons. Then it requires a 20 GP container for shipping. Except for quality products, we will also offer professional shipping tips and other value-added services. Contact us for more details!

Galvanized Round Tube for Sale

Galvanized Round Tube for Sale

GI Steel Tubes in Stock

GI Steel Tubes in Stock

Round Galvanized Tubes

Round Galvanized Tubes

Application

The lightweight and corrosion-resistant material allow its use in many outdoor installments. Below are the detailed applications of the galvanized round tube.

1. Galvanized round tubings are used for pipelines, water, gas pipes, cooler, coal distillate oil exchanger pipe, and trestle pipe pile, etc.

2. Galvanized steel round tubings suitable for the oil industry, especially in offshore oil fields, oil heaters and condensation of chemical cooking equipment, etc.

3. GI round pipes apply to steel structure engineering, trestle pipe pile, support pipe for mine tunnel, etc.

4. Galvanised round tubes are used for machinery manufacturing and chassis, etc.

Trans Pipeline

Trans Pipeline

Handrail

Handrail

Electrical Circuit

Electrical Circuit

Galvanized Round Tubing Making Process

The process flow is:

Black tube→Alkaline washing→Water washing→Pickling→Water rinsing→Soaking agent→Drying→Hot dip galvanizing→Outside blowing→Internal blowing→Air cooling→Water cooling→Passivation →Water rinsing→Drying→Warehousing

1.Alkaline washing: to remove the oil on the surface of the steel pipe.

2.Pickling: to remove the oxide scale on the surface of the steel pipe.

3.Water rinsing: to remove residual acid and iron salts attached to the surface of the steel pipe.

4.Soaking agent: to remove all impurities on the surface of the steel pipe, ensure that the steel pipe is in clean contact with the zinc liquid to form a good coating.

5.Drying: to prevent explosion when a steel pipe is immersed in a zinc pot.

6.Hot Dip Galvanizing: the whole steel tube is soaked in a zinc bath so that the surface of the steel tube is evenly coated with zinc.

7.Outside Blowing & Internal Blowing: to blow away the excess zinc liquid of the steel pipe, obtain a smooth and clean appearance.

8.Water cooling: to reduce the temperature of the round galvanized pipe, the temperature of the water cooling tank is controlled at 80℃.

9.Passivation: the surface of the galvanized pipe is passivated by spraying and blowing the finished pipe with passivation liquid.

10.Water Rinsing: to wash off the excess passivation liquid.

11.Drying: the galvanized round pipes pass through a drying rack with steam heating pipes, and are packaged after being dried.

Hot-dipped Galvanizing Process

Hot-dipped Galvanizing Process

Should Galvanized Round Tubing Be Painted With Anti-rust Paint?

After the round steel pipe is galvanized, the surface is covered with a layer of zinc coating. The thin and dense zinc protective layer can protect the steel sheet from further oxidation. That’s why the galvanized steel tube is durable to use. Generally, the service life of GI tubing is 30+ years. You may wonder should the galvanized tube be painted with another anti-rust paint. The paint layer can also protect the base metal. Also, it will make the tubing more beautiful. But it will increase the cost. We suggest that to be painted or not should depend on the use environment, budget, and the expected service life. For example, you can paint the tubes as you like for aesthetic purposes if you have enough budget.

What Is The Life Expectancy of Galvanized Round Tubing?

The galvanized round pipe is used in fabrication, construction, numerous applications, and maintenance due to the long service life. But in different conditions the lifetime of use is different.

Generally speaking, 10-15 years in the heavy industrial district, 25-30 years in the city, 50-60 years for the ocean environment, over 100 years in suburbs.

However, GI round pipes are well-built, well-installed, and well-maintained can easily exceed the typical lifespan.

Galvanized Steel Tubes for Sale

Galvanized Steel Tubes for Sale

GI Round Steel Tube in Stock

GI Round Steel Tube in Stock

Wanzhi Steel Factory

Wanzhi Steel Factory

Conclusion

Galvanized round tubing is protected from rust and corrosion. So it has strong corrosion resistance and long service life. While it requires lower cost than stainless steel. Besides, it is easy to cut, weld, rivet, drill, and screw for different uses. Wanzhi Steel provides tubing solutions for all of your application needs, with different sizes, materials, and shapes. In addition, we also offer full service from pre-sales consulting to after-sales service. Welcome to contact us for more details.

 

  • 17 years+

    Metal material industry exprience

  • 12 years+

    Import and export experience

  • 120 +

    Countries / regions have global cooperation

  • 1000 +

    Annual export volume