Hot-dip galvanized pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in the tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the in the hot dip bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate, so it has strong corrosion resistance.

Production process of galvanized steel pipe:

Clarinet—alkali cleaning—water washing—pickling—water rinsing—soaking aid—drying—hot dip galvanizing—outside blowing—inside blowing—air cooling—water cooling—passivation - water rinsing - inspection - weighing - storage.

Shanganglian's steel products will be inspected before they leave the warehouse to provide customers with high-quality steel products and ensure quality.

How to remove rust from galvanized steel pipe?

Galvanizing is divided into hot galvanizing and cold galvanizing. Hot galvanizing is not easy to rust, and cold galvanizing is easier to rust.

1. First, use a solvent to clean the surface of the steel to remove the organic matter on the surface.

2. Then use tools to remove rust (wire brush), remove loose or inclined rust, welding slag, etc.,

3. Use pickling method.

Why try to avoid galvanized steel pipes as water supply pipes?

Galvanized pipes are used as water pipes. After several years of use, a large amount of rust and scale will be generated in the pipes. The yellow water flowing out will not only pollute the sanitary ware, but also be mixed with bacteria that grow on the rough inner wall. The rust will cause excessive heavy metal content in the water, which will seriously endanger human health.

Current national standards for galvanized steel pipes:

GB/T3091-2015 Welded steel pipes for low-pressure fluid transportation

GB/T13793-2016 straight seam electric welded steel pipe

GB/T21835-2008 Welded steel pipe dimensions and weight per unit length

Shanganglian steel production fully meets the national standards. The core advantage is to provide customers with high-quality steel, establish a high-quality brand in the steel industry, and establish long-term cooperative relationships with customers.