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What Is Hot Dip Galvanized Pipe?
Time: 2024-01-26
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Hot dip galvanized pipe, also known as galvanized strip steel pipe, refers to a steel pipe with a layer of zinc plated on the surface of the steel pipe. In order to improve the corrosion resistance of the steel pipe, general steel pipes are galvanized. Galvanized steel pipes are divided into two types: hot dip galvanizing and electro-galvanizing. Hot-dip galvanizing has a thick zinc layer, while electro-galvanizing has low cost and the surface is not very smooth.

This kind of steel pipe is widely used in construction, transportation, communications, electricity and other fields. It is an important metal product.

1. Introduction to corresponding features

  • Uniformity of the galvanized layer: The steel pipe sample shall not turn red (copper-plated color) after being immersed in copper sulfate solution for 5 consecutive times.
  • Surface quality: The surface of galvanized steel pipes should have a complete galvanized layer. There should be no uncoated black spots and bubbles. Small rough surfaces and local zinc tumors are allowed.
  • Galvanized layer weight: According to the requirements of the purchaser, galvanized steel pipes can be measured for zinc layer weight. The average value should not be less than 500g/square meter, and any sample should not be less than 480g/square meter.

2. Manufacturing process of hot dip galvanized pipe

  • Raw material preparation: Select high-quality steel as raw material, and go through cutting, straightening, rust removal and other processes to ensure the quality and surface quality of the raw material.
  • Pickling treatment: Put the steel into the pickling solution to remove the oxide scale and rust on the surface to ensure the adhesion and uniformity of the galvanized layer.
  • Hot-dip galvanizing: Put the pickled steel into molten zinc, and after a certain time and temperature, the zinc liquid forms a uniform galvanized layer on the surface of the steel.
  • Cooling treatment: The galvanized steel is cooled to make the galvanized layer more stable and firm.
  • Finished product inspection: Conduct quality inspection on finished products, including appearance, size, galvanized layer thickness and other indicators to ensure that product quality meets standards.

Hot Dip Galvanized Pipe 1

3.Does Galvanized Steel Rust?

For more information on whether galvanized pipes will rust and how to prevent them, you can check out our other article – Will galvanized pipes rust?

Quanshuo Metal Materials is a manufacturer that has passed ISO9001:2015, TUV, SGS, and CE certification. It mainly produces Galvanized Steel, etc., with an annual output of 300,000 tons. Looking forward to your inquiry.

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+86 13027616811