1. erw steel pipe made from pre galvanized steel coil , zinc coating normally: 60gms total on both size , special order specification:

80gms , 100gms, 120gms, 140gms, 160gms, 180gms, 200gms ,220gms 

2.erw steel pipe hot dipped galvanized , zinc coating normally: external 220gms, internal 180gms , special order specification: 

280gms   320gms , 350gms, 400gms , 450gms , 500gms , 550gms ,600gms 

3. erw steel pipe electrical galvanized, zinc coating normally: 20gms