Ductile Cast Iron Pipe 1.Material:GGG500-7 &400-12 or ASTM-A-536 Grade 80-55-06 2.Inspection:Third Party inspection available Ductile Cast Iron Pipe1) Product Information The ductile iron pipes manufactured by SYI foundry are mainly used for conveying many fluid media such as water, oil and gas, are widely used in various pipeline projects for metallurgy, mine, water conservancy, petroleum and ...