What are the advantages and disadvantages of galvanized pipes

Galvanized pipe is a galvanized pipe made by bending the strip steel or coil into a spiral shape and welding the inner and outer seams with double-sided submerged arc automatic welding. It is widely used in manufacturing industries such as construction, machinery, coal mining, chemical industry, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery, etc. Let's take a look at the advantages and disadvantages of galvanized pipes.

1. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The galvanized pipe matrix undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.

2. As long as the forming angle is changed, steel pipes of various calibers can be produced with the same width of strip steel, which is easy to adjust.

3. Because it is continuously bent, the fixed length of the spiral pipe is not limited and the length can be set at will.

4. The spiral weld is evenly distributed on the entire circumference of the spiral pipe, so the spiral pipe has high dimensional accuracy and strong strength.

5. It is easy to change the size, which is suitable for the production of small batches and multiple varieties of spiral pipes. The weld of the galvanized pipe is longer than that of the straight seam pipe of the same specification. Under the same specification wall thickness, the hot-dip galvanized steel pipe bears the greatest pressure.

6. The galvanized pipe is a welded steel pipe with a hot-dip or electroplated zinc layer on the surface. Galvanizing can increase the corrosion resistance of the steel pipe and extend its service life.

The defect of the weld of the galvanized pipe is "oblique defect". During use, the equivalent defect length in the main stress direction of the steel pipe, that is, the axial direction of the steel pipe, is smaller than that of the straight seam pipe; secondly, since the pipeline steel is all rolled steel plate, the impact toughness has a large anisotropy, and the CVN value along the rolling direction can be 3 times higher than the CVN value perpendicular to the rolling direction.

The advantages and disadvantages of galvanized pipes can only be known through comparison in use. Galvanized pipes can be detected through various data indicators after use, so here we can only provide you with the theoretical advantages and disadvantages of galvanized pipes. Everything is based on feedback provided by real users.