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Product Details:
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| Standard: | Astm A53, Api 5l Psl1 Psl2 | Grade: | Gr.b,x42,x52,x60,Gr.2.3,A106B,SS400,St37,St52 |
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| Length: | 5.8m-12m-18meter | Quality: | Iso9001 International Certificate |
| Diameter: | 1"-48" Inch | Widely Use: | Construction, Machinery, Coal Mine, Chemical Industry, Electric Power |
| Origin: | China | Corrosion: | Hot Dipped Zinc Coated |
| High Light: | 20 foot 2 inch galvanized pipe,1" seamless carbon steel pipe,1" 20 foot 2 inch galvanized pipe |
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A53 Astm Specification For Hot Dipped Zinc Coated Welded Seamless Galvanized Carbon Steel Pipe
Hot-dip galvanizing (HDG) is the process of coating fabricated steel by immersing it in a bath of molten zinc. There are three fundamental steps in the hot-dip galvanizing process; surface preparation, galvanizing, and inspection.
When the fabricated steel arrives at the galvanizing facility, it is hung by wire or placed in a racking system which can be lifted and moved through the process by overhead cranes. The steel then goes through a series of three cleaning steps; degreasing, pickling, and fluxing. Degreasing removes dirt, oil, and organic residues, while the acidic pickling bath will remove mill scale and iron oxide. The final surface preparation step, fluxing, will remove any remaining oxides and coat the steel with a protective layer to prevent any further oxide formation prior to galvanizing. Proper surface preparation is critical, as zinc will not react with unclean steel.After surface preparation, the steel is dipped in the molten (830 F) bath of at least 98% zinc.
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