ductile-iron pipe

ductile-iron pipe

A pipe that is fabricated of a cast-iron alloy in which graphite replaces the carbon that is present in cast-iron; provides the same advantages as cast-iron pipe along with the added advantage of a higher external load-bearing capacity; not as brittle as cast-iron pipe (thus permitting rougher handling) but higher in cost.
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Written for designers, managers and operators of water distribution systems, this manual contains all the technical specifications and applications information regarding ductile-iron pipes and fittings.
Ductile-iron pipe and fittings, 3d ed
A second reason ductile iron tends not to hold up as well under comparable biocorrosion attack, King says, is that because of their superior strength, ductile-iron pipes tend to be made thinner.
When iron isn't stronger

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