DI Pipe (Ductile Iron Pipe) is a high-strength metallic pipe made from ductile cast iron, widely used for potable water supply, sewerage, and industrial pipelines. It is known for its excellent mechanical strength, durability, and long service life. A DI pipe is manufactured by adding magnesium to molten iron, which changes the graphite structure into a ductile (spheroidal) form. This makes the pipe stronger, tougher, and more flexible than traditional cast iron pipes.