Large pipes, from DN1000X6000 to DN1600X6000, are casted out from resin sand shell adhered and solidificated inside hot mold in which resin sand is spreaded on its internal wall in advance. As thicker and better isolation of resin sand layer, cooling speed of this kind casting method is the slowest among 3 kinds of methods of centrifugal casting pipe. easy operation and good durability of metal mold are also its¨ remarkable features.

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