Angang Group Yongtong Ductile Cast Iron Pipe Co., Ltd. is a holding subsidiary of Angang Group. It was restructured and established on December 30, 2005, through the merger of Angang Group's subsidiary, Shuiye Iron & Steel Co., Ltd. and Yongtong Ductile Cast Iron Pipe Co., Ltd. Yongtong is the production base for pig iron in Henan, China, with an annual output of 1.5 million tons. The pig iron produced has characteristics such as low phosphorus, low sulfur, and low titanium, with excellent product quality. In 1999, the company passed the ISO 9001 quality management system certification. Its products are widely used by large precision casting enterprises in China and are exported to more than ten countries and regions in the Americas, Europe, and Asia.