Cement-mortar lined ductile iron pipe is a
ductile iron pipe
Ductile iron pipe is pipe made of ductile cast iron commonly used for potable water transmission and distribution.Moser, A. P. and Folkman, Steven L. (2008) ''Buried Pipe Design'' (3rd edition) McGraw-Hill, New Yorkp. 336-337 This type of pipe ...
with
cement
A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel ( aggregate) together. Cement mix ...
lining on the inside surface, and is commonly used for
water
Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a ...
distribution.
Cement-mortar lined ductile iron pipe is governed by standards set forth by DIPRA (Ductile Iron Pipe Research Association), and was first used in 1922 in
Charleston, South Carolina
Charleston is the largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston–North Charleston metropolitan area. The city lies just south of the geographical midpoint o ...
.
Ductile Iron is commonly used in place of
cast iron
Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impuriti ...
pipe for fluid distribution systems, the idea of lining the formerly cast iron and currently ductile iron was put into practice for the first time in Charleston, South Carolina in 1922. The purpose of installing a cement/mortar lining to the interior wall of the pipe is to reduce the process of tuberculation inside the pipe network. The cement/mortar lining provides an area of high
pH near the pipe wall and provides a barrier between the water and the pipe, reducing its susceptibility to
corrosion
Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engine ...
.
Piping
1922 introductions
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