Astm A53 Standard DN100 Grooved Galvanized Carbon Steel Pipe
Galvanized pipe ordered under this specifification shall be coated with zinc inside and outside by the hot-dip process.
The zinc used for the coating shall be any grade of zinc conforming to Specifification B6. Weight (Mass) per Unit Area of Coating—The weight
(mass) per unit area of zinc coating shall be not less than 1.8 oz/ft2 [0.55 kg/m2 ] as determined from the average results of the two specimens taken for test in the manner prescribed in 17.5 and not less than 1.6 oz/ft2 [0.49 kg/m2 ] for each of these specimens. The weight (mass) per unit area of coating, ex pressed in ounces per square foot [kilograms per square metre] shall be calculated by dividing the total weight (mass) of zinc, inside plus outside, by the total area, inside plus outside, of the surface coated. Each specimen shall have not less than 1.3 oz/ft2 [0.40 kg/m2 ] of zinc coating on each surface, calculated by dividing the total weight (mass) of zinc on the given surface (outside or inside) by the area of the surface coated (outside or inside).
Hot dip galvanized pipe is to make molten metal and iron matrix reaction to produce alloy layer, so that the substrate and 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 by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent into the hot dip plating tank.Galvanized steel tubes are welded steel tubes with hot dip or electric galvanized coating on the surface.Galvanizing can increase the corrosion resistance of steel pipe and prolong its service life.
Standard | Astm a53, Api 5l psl1 psl2 |
Grade | Gr.b,x42,x52,x60,Gr.2.3,A106B,SS400,St37,St52 |
Length | 5.8m-12m |
Diameter | 1"-48" inch |
Widely Use | construction, machinery, coal mine, chemical industry, electric power |
Corrosion | Zinc Corrosion |
