The production process of galvanized steel pipes is restricted by national standards. The galvanized steel pipes we use are in accordance with the current national standards for galvanized steel pipes: GB/T3091-2008 "Welded Steel Pipes for Low-Pressure Fluid Transport", GB/T13793-2008 "Straight Seam Electric Welded Steel Pipes" ", GB/T21835-2008 "Welded Steel Pipe Dimensions and Weight per Unit Length" process to complete the production.
The current national standard of galvanized steel pipe:
GB/T3091-2008 "Welded Steel Pipe for Low-Pressure Fluid Transport"
GB/T13793-2008 "Straight Seam Electric Welded Steel Pipe"
GB/T21835-2008 "Welded Steel Pipe Dimensions and Weight per Unit Length"
Galvanized steel pipe production process standard:
The 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 matrix of the hot-dip galvanized steel pipe and the molten plating solution undergo complex physical and chemical anti-galvanizing reactions 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 tube substrate. Therefore, it has strong corrosion resistance.