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Düker manufactures castings to customer specification in small, medium and large series. The manufacture of casting cores, enamelling and paint removal on the customer's behalf are also possible.
The material used for the manufacture of cast iron sewage
pipes and fittings is cast iron with lamellar graphite,
grey cast iron GG as per EN 1561 - type at least EN-GJL-150
- an iron carbon alloy with a high graphite quota, which
is integrated in lamella form and finely distributed
within the material. This structure, typical for Düker,
gives the material a high stability, wear resistance,
temperature and fire resistance, excellent corrosion
resistance (as compared with steel) and a high damping
capacity.
Düker cast iron sewage pipes distinguish themselves
by their robustness, durability, fire resistance and
noiseless use - even without special insulation and
sound damping measures.
Düker is the only company to manufacture Hubless cast
iron sewage pipes and fittings in Germany. The works
are in Karlstadt/Main in Northern Bavaria. The pipe
production applies the centrifugal casting procedure.
The liquid cast iron is poured into a pipe-shaped mould,
which rotates rapidly around its longitudinal axis.
This rotation makes the cast iron spread very evenly
on the inside walls of the mould, and after cooling
the result is a pipe with extremely smooth inside surfaces
and equal wall thickness on its whole length. Fittings
are cast in so-called dead moulds made of molding sand
and core sand. |
Quality Manufacture
