 Ductile iron pipe so far in the world has become the material of
choice on the water, and it should be gradually extended gas
pipeline system, the reason is that with the strength of steel,
ductile iron pipe and the required elongation, but the corrosion
resistance is more than twice the steel pipe. Flexible interface
can effectively play the vibration damping effect.
GB / T 13295-2008 water and gas pipes with ductile iron pipes,
fittings and accessories
Ductile iron pipe as a new pipe, its better performance in:
excellent mechanical properties, saving metal; simple
construction, integrated project cost economy, high reliability,
corrosion resistance, safe water gas; pipelines for water
supply, water supply pipe network, pipeline network, gas
pipeline network in the field of long life is a ductile iron,
carbon, silicon alloys, in which spherical carbon-free state in
the presence of graphite.
Gray cast iron, iron flake graphite matrix production
"fragmented" effect. Make it brittle. Nodular cast iron,
spheroidal graphite eliminate this damaging effects to make it
tough. Nature has iron, steel properties.
Ductile iron pipe with excellent mechanical properties and from
external quality, is the cause of piped water bearer, its
superior bearing capacity, reliable sealing performance,
unmatched corrosion protection and water quality assurance
system, making piped water Branch near perfect, even in complex
terrain balanced saline soils, wetlands and high slope and
deserts, but also supply task well done
Centrifugal ductile iron pipe and pressure resistance and
tensile strength steel rather than gray cast iron pipe extending
rate is greatly improved, with good tough type; not only
overcome the shortcomings of gray iron pipe easy to break, but
also to avoid the pipe in under greater pressure variable type
of undesirable phenomena. Thus, ductile iron pipe on the seismic
capacity of the effect is significant, but also significantly
extend the useful life, as long as 50-70 years.
Ductile iron pipe has replaced ordinary cast iron pipe, most
currently seen in the municipal engineering and installation
works, water supply, gas and other pipeline.
Ductile iron pipe is a pipe produced by centrifugal casting
process, the material is ductile iron. It is widely used in
metallurgy, mining, water, petroleum and urban public
construction projects of various pipeline can transport water,
gas and other fluids. It has the essence of iron, steel
performance, high strength, good toughness, corrosion
resistance, is the traditional cast iron pipe and ordinary steel
replacements. In addition, the centrifugal ductile iron pipe
straight is good, smooth surface, accurate size, wall thickness,
good mechanical properties, coating adhesion firm, using
T-socket type flexible interface, apron seal, easy to install.
[Ductile iron pipe strength than ordinary cast iron pipe]
Ductile iron and cast iron in general contain graphite monomer,
that is a mixture of cast iron and graphite. Ordinary flake
graphite cast iron in the presence of very low intensity of
graphite, so the gap is equivalent to the existence of much
sheet iron, so ordinary cast iron strength is relatively low,
more brittle. Graphite cast iron is spherical graphite, many
equivalent spherical voids in the presence of iron. Effects of
spherical voids strength than cast iron sheet gap are small, so
many high-strength ductile cast iron than ordinary strength.
High-strength ductile iron pipe, of course the more popular it!
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