Hebei Province-based Chinese pipe producer Xinxing Ductile Iron Pipes Co. (Xinxing Ductile Iron Pipes) has announced that its wholly-owned subsidiary, Guangdong Province-based Guangdong Xinxing Ductile Iron Pipes Co. (Guangdong Xinxing) plans to construct a production line to produce DN350-800 medium diameter cast pipes in Yangjiang, Guangdong Province, which will produce 200,000 mt of cast pipe annually, with an estimated investment of RMB 300 million ($46.7 million).