Innovative、Steady、Honest

Innovative、Steady、Honest

The Production Flow Chart of Ductile Iron Pipes
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1.Molten

The raw materials are molten in electric induction furnace. The temperature and composition of the molten iron are monitored and controlled in the holding furnace.
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2.Desulfurizing, Spheroidizing and Inoculation Treatments

The molten iron is treated with magnesium and become spheroidized.
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3.Centrifugal casting

Two methods are applied in the centrifugal casting: one is metal mold water-cooling process, the other is wit-spray hot mold process.
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4.Continuous heat treatment

After casting, the pipe is sent to the heat treatment furnace to change its metallographic structure.
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5.Test and inspection

After mechanical processing, metallographic examination, flattening test, hydrostatic pressure test and scale inspection are applied.
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6.Inspection and Testing

After inspection, the internal of pipe is applied with a cement mortar lining or epoxy powder coating.
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7.Lining, Coating and Final Inspection

The outside of pip is applied with metallic zinc, on top of metallic zine, bitumen paint is applied.
The Production Flow Chart of Ductile Iron Fittings
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1.Molten

The raw materials are molten in electric induction furnace. The temperature and composition of the molten iron are monitored and controlled in the holding furnace.
proimages/ability/02/B2.JPG

2.Modeling and casting

The molten iron is treated with magnesium and become spheroidized.
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3.Modeling and casting

According to the size of fittings: Either furan resin sand molding method or cement molding method is applied.
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4.Spray cleaning and machining

After the casting is taken out, the casting is sprayed and grounded, and then machine processed.
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5.Test and inspection

After mechanical processing, metallographic examination, flattening test, hydrostatic pressure test and dimensional inspection are applied.
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6.After inspection, the internal surface of fitting is applied with epoxy powder coating.
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7.The external surface of fitting is applied with metallic zinc and bitumen coating.