Galvanized Erw Round Carbon Steel Tube Od 21mm
Product Details
od 21mm round carbon steel tube
,erw round carbon steel tube
,od 21mm galvanized carbon steel tube
Round Pipe Tube Carbon Steel Tube Gi Galvanized Steel Pipe
Hot dip galvanized pipe:
It is to make the molten metal react with the iron matrix to produce an alloy layer, so as to combine the matrix
and the coating. Hot dip galvanizing is to pickle the steel pipe first. In order to remove iron oxide on the surface
of the steel pipe, after pickling, it is cleaned in ammonium chloride or zinc chloride aqueous solution or ammonium
chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot dip galvanizing tank. Hot dip galvanizing
has the advantages of uniform coating, strong adhesion and long service life. Most of the processes in the North adopt
the process of directly rolling pipe with galvanized strip for zinc supplement.
Production process:
Black parts inspection → hanging → degreasing → rinsing → pickling → cleaning → dipping plating aid
→ hot air drying → hot dip galvanizing → internal and external blowing → cooling → passivation and rinsing
→ unloading → inspection and finishing → typing identification → packaging, warehousing and transportation.
Galvanized strip → uncoiling → stretching → rolling pipe → welding → scarring → passivation and rinsing
→ zinc supplement → setting → typing identification → cutting → packaging → drying → weighing.
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