Ductile iron pipes are are mode of ductile cast iron and hence the name. They find extensive application for potable water transmission and distribution. Ductile iron pipes are produced by centrifugal casting method. Internal linings and external coatings are applied to prevent corrosion of ductile iron pipes.
Nominal Diameter or DN, a dimensionless term is used to specify ductile iron pipe dimensions. Similar to steel pipes, the outside diameter of ductile iron pipes is kept constant, and depending on the pipe thickness the inner diameter varies. Ductile iron pipe dimensions vary from region to region. The dimension also varies according to the design code used. In the following paragraphs, the dimensions of ductile iron pipes are provided according to the design codes and regions.
