Galvanized Scaffold Tube
Galvanized Scaffold Tube is also called galvanized steel tube. This kind of tube is coated with a layer of galvanized steel on the surface of the steel. It prevents corrosion and rusting of steel materials, and at
Galvanized Scaffold Tube
Galvanized Scaffold Tube is also called galvanized steel tube. This kind of tube is coated with a layer of galvanized steel on the surface of the steel. It prevents corrosion and rusting of steel materials, and at the same time, helps to extend the use time of steel materials.
EK is a professional manufacturer and supplier of Galvanized Scaffold tubes in China. EK’s galvanized steel tube surface is welded steel tube with hot-dip galvanized and electro-galvanized. The hot-dip galvanizing layer is thick, the cost of electro-galvanizing is low, and the cover is not very smooth.
All Galvanized Scaffold Tube materials provided by EK are made of carbon steel that meets the standards of Q235 or Q345 and are in compliance with BS1139, EN39, ASTM36, JIS 3444, EN10219, AS 1576 standards.
1.how to make a galvanized scaffold tube?
The galvanizing process of the galvanized tube 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 Rinse——Inspection——Weighing——Warehousing.
- Pre-treatment process for plating
There are five alkaline washing, pickling, rinsing, soaking aids, and drying.
1) There are oil stains on the surface of some steel Tubes, so alkaline washing is required.
2) Use hydrochloric acid for pickling to remove the oxide scale on the surface of the steel Tube.
3) To remove residual acid and iron salts attached to the surface of the steel Tube, the steel Tube needs to be rinsed twice.
4) The function of the flux is to remove all impurities from the surface of the steel Tube to ensure clean contact between the steel Tube and the zinc liquid and form a good coating.
5) To prevent the blasting phenomenon of steel Tubes immersed in the zinc pot, the steel Tubes coated with flux is necessary to dry at a temperature of 120-200℃ and a time, not less than 150s.
- Hot-dip galvanizing process
1) The temperature of the zinc liquid in the zinc pot is strictly controlled at 450±5℃.
2) The dried steel Tubes are removed one by one through the drying furnace chain, immersed in the furnace roller table, then transported to the galvanizing furnace, and rolled into the three dipping spirals in the galvanizing machine.
3) The three spirals have different phases so that the steel Tube is inclined on the spiral. As the spiral rotates, the steel Tube moves downward and forms an inclination angle, then enters the zinc liquid and continues to move downward.
4) The steel Tube is automatically dropped on the slide rail in the zinc pot, and the material shifting mechanism will shift it to the outside, and then the zinc liquid will be lifted out by the Tube lifter.
5) When the steel Tube is lifted to the surface of the magnetic roller, it is sucked and moved to the traction roller table.
- Post-plating treatment process
The post-plating treatment process includes external blowing, dragging, internal blowing, water cooling, inspection, passivation, and printing.
1) The steel Tube passes through the outer blowing ring, on which there is a row of small holes. Through the compressed air, the excess zinc liquid of the steel Tube is blown away to obtain a smooth and clean appearance.
2) When the production rhythm is satisfied, the dragging speed can be reduced to control the zinc loading and lessen the zinc consumption.
3) Internal blowing can remove the excess zinc liquid on the inner surface of the steel Tube to obtain a smooth inner surface. The extracted zinc liquid forms zinc powder and is recycled.
4) The temperature of the water cooling tank is controlled at 80°C, and the cooling water is pumped to the cooling tower for cooling and then recycled.
5) After water cooling, remove the water cooling tank and drop it on the inspection bench. After the inspection, put the missing plating tube into the wastebasket, and the finished tube is sent to the output roller table.