Shandong Upsun Industry Co.,Ltd. is located in the heavy industry province of Shandong , Which have second biggest iron and steel company of China.Base on this, we begin to produce and export Ductile iron pipes, Ductile Iron Pipe Fittings,Joints, Valves, Manhole Covers and accessories from 2010.Now our product cover the standards such as ISO2531, EN545, EN598,DIN3352,ISO7005,EN10742,EN1092.WRAS and other widely used for water supply accessories. After more than 10 years developing, our product a