Knowledge

09Feb, 2025

Water Quality Requirements for Cooling Galvanized Steel Pipes
The cooling water used for cooling galvanized steel pipes should preferably be clear river water or groundwater. Water with high turbidity, chroma, suspended solids, and oil slicks
09Feb, 2025

Cooling Methods for Galvanized Steel Pipes
The cooling process for hot-dip galvanized steel pipes consists of two parts: air cooling and water cooling. The details are as follows: Air Cooling Process Air Cooling Time: 20 to
21Jan, 2025

The reason for water cooling galvanized steel pipes
After a certain process time of air cooling, hot-dip galvanized steel pipes must be immediately subjected to water cooling. During air cooling, the temperature of hot-dip galvanize
21Jan, 2025

The reason for using lightweight aluminum alloy idler rolls to transport galv...
After undergoing the external zinc blowing and wiping surface treatment, the galvanized steel pipes have completed the final finishing process for the galvanized layer. However, si
21Jan, 2025

What parameters determine the air cooling time for galvanized steel pipes?
Air cooling time is actually a rather crucial parameter. Neglecting this factor can affect the production output and quality of hot-dip galvanized steel pipes. Therefore, it should
21Jan, 2025

The reason for air cooling after internal and external blowing and wiping tre...
After galvanized steel pipes are removed from the zinc bath, there is always an air cooling period, the duration of which depends on the production process. Practical production ex
21Jan, 2025

The reason for initially increasing the gas flow rate during external blowing...
At the beginning of external blowing and zinc wiping for galvanized steel pipes, it is required to double the gas flow rate to ensure the pipes enter the gas field. There are two r
20Jan, 2025

The reasons for preferably using superheated steam for internal blowing and w...
The gases commonly used for blowing and wiping the unsolidified zinc liquid on the inner wall of galvanized steel pipes include superheated steam, compressed air, pressurized hot a
20Jan, 2025

The Reason for Blowing and Wiping the Inner and Outer Surfaces of Galvanized ...
After emerging from the molten zinc bath, steel pipes must undergo blowing and wiping treatment on both their inner and outer surfaces for the following reasons: (1) To remove zinc
20Jan, 2025

Impact of Pretreatment on the Adhesion of Galvanized Coatings
If the "solvent (or flux) method" is employed for pretreatment before galvanizing, the steel pipe surface may exhibit various issues such as oxide scale left from insuffi
20Jan, 2025

Impact of Molten Zinc Temperature on Zinc Dross
When the temperature of molten zinc is very high, a large amount of iron is dissolved in it. For example, when heated to 510°C, 0.10% of iron is dissolved, which reacts with 1.
20Jan, 2025

Impact of Zinc Dross on the Galvanized Layer of Galvanized Steel Pipes
During hot-dip galvanizing, zinc dross in the molten zinc becomes mixed within the zinc bath and subsequently incorporated into the galvanized layer when applied to steel pipes. Su

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