Shandong ductile pipes co.ltd is the largest subsidiary company of Jinan iron & steel corporation. The first heat of metal of Shandong province was produced here in 1958. The company imported advanced water-cooled centrifugal casting equipment in 1989 became the first one that produce centrifugal casting ductile iron pipes according to ISO2531(GB13295)in China Through constant development and accumulation the company fix assets has reached 2 billion RMB .the company has sinter machines , pellet ...