Ductile iron pipe has many unique and desirable capabilities which
combines the physical strength of mild steel with the proven longevity
of grey cast iron. This combination enables ductile pipe to bend and
flex under stress while other pipe materials may fail.
Ductile Iron evolved from a metallurgical process which involves the
addition of magnesium to the molten iron. The basic composition remains
unaltered while the flake graphite structure becomes nodular in form
thereby increasing the tensile strength.
This molten metal is then centrifugally cast in water cooled metal
molds. The cast pipe is then subjected to heat treatment in an
annealing oven. After the pipe cools it is then passed to the finish
line which includes hydrostatic testing, cement lining, coating and
final inspection.
The superior strength and toughness of Ductile Iron provides a great
margin of safety against failure and resists breakage during
transportation and installation.
