Manufacturing process of ductile iron pipe:
1. Molten Iron Preparation.
2. Spheroidization
3. Core Making.
4.Centrifugal Casting
5. Annealing.6. Zinc Coating.
7. Finishing and Hydraulic Testing
8. Cement Linning.
9. Cultivating.
10. Bitumen Coating
11. Marking and Packing.
