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Diameter 250mm 100mm 80mm Std C40 ISO2531 Pn40 C40I Pn25 Pn10 Ductile Iron Pipe, Find Details and Price about Ductile Iron Pipe K9 Ductile Iron Pipe from Diameter 250mm 100mm 80mm Std C40 ISO2531 Pn40 C40I Pn25 Pn10 Ductile Iron Pipe - Shandong Hongqiao Energy Equipment Technology Co., Ltd.