Ductile Iron Pipe (Tube), also namely Ductile Cast Iron Pipe or Ductile Iron Spun Pipe is a centrifugally cast product. A controlled amount of molten iron is introduced into the rotating mold, which generates a centrifugal force that holds the iron in place against the mold until it solidifies. The pipe is then removed and furnaceannealed to obtain the prescribed physical properties and the most common type is T type Ductile Iron Pipe.