Today, whether it is construction, machinery, coal mining, chemical industry, or electric power, automotive industry, highways, Bridges and other manufacturing industries, are inseparable from galvanized pipe. It has a hot dip plating or electric galvanizing layer on the surface, which can increase the corrosion resistance of the steel pipe, thereby extending the service life.
Chemical Component
(1) Carbon; The higher the carbon content, the higher the hardness of the steel, but the worse its plasticity and toughness.
(2) sulfur; It is harmful debris in steel. And steel with high sulfur content is easy to be brittle when it is processed under pressure at high temperature, usually called hot brittleness.
(3) Phosphorus; Can make the plasticity and toughness of steel significantly decreased. Especially at low temperatures more serious, this phenomenon is called cold brittleness. In high-quality steel, sulfur and phosphorus should be strictly controlled. However, on the other hand, the low carbon steel contains higher sulfur and phosphorus, which can make it easy to cut. And it is advantageous to improve the machinability of steel.
(4) Manganese; Can improve the strength of steel, can reduce and eliminate the adverse effects of sulfur, and can improve the hardenability of steel, high alloy steel with a high manganese content (high manganese steel) has good wear resistance and other physical properties.
(5) Silicon; It can improve the hardness of steel. But the plasticity and toughness decline, electrical steel contains a certain amount of silicon, can improve the soft magnetic properties.
(6) Tungsten; It can improve the red hardness and thermal strength of steel, and improve the wear resistance of steel.
(7) Chromium; It can improve the hardenability and wear resistance of steel. And it can also improve the corrosion resistance and oxidation resistance of steel.
(8) Zinc; In order to improve the corrosion resistance, the general steel pipe (black pipe) is galvanized.
Connection Mode: Thread, Welding
Take welding methods as an example:
1. The galvanized steel pipe mouth is not in a straight line after docking and the steel pipe has the problem of diagonal, it is recommended to cut off a small section of the steel pipe head before processing.
2. Galvanized steel pipe mouth docking after the two pipe mouth docking phenomenon, resulting in uneven welding thickness; As well as the steel pipe due to its own reasons or transportation bump, resulting in the pipe mouth oval, it is recommended to cut off a small section of the pipe head before processing.
3. After the galvanized pipe port docking, sand holes appear at the pipe port:
4. Welding due to technical reasons.
Applications of Galvanized Pipe
1.Fire engineering: The current fire water pipe is basically galvanized pipe. And a layer of paint is applied to the outer layer of galvanized pipe, so that everyone can see the red fire pipe that is actually galvanized pipe.
2.Steel structure, welding engineering: There are many scaffolding workshops outside. And the old workshops are built with welded steel pipes, but welded steel pipes are easy to rust. To prevent rust, a coat of paint should be applied. New steel structure projects directly use galvanized pipes, which can save man-hours and have a longer service life.
3.Agriculture: Mainly used for the construction of warm greenhouses, flower sheds and pillars for flowers and melons.
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