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- An important advantage arises with the choice of
the base material. Pipes
with standard sizes are used, i.e. the same pipes as
demanded for your
piping system. Hot forming of fittings usually requires
special non standard
sized pipe as base material which often leads to long
delivery time - or in
case of exotic steels additionally to mini-mum production
quantities.
The WS-cold forming technique offers easy solutions even
for your most
urgent demands:
You supply the pipe - we produce the fittings from your
pipe.
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Stress calculations show that the tension occurs in the
crotch area. Therefore
the reinforcement of this area becomes very important.
The WS-cold forming
fully complies with this requirement. The wall thickness
on the inner radius is
always heavier than on the outside. By using the hot
forming method, the wall
thickness is the same on all parts of the elbow. Therefore,
the elbow has to
be manufactured with a heavier wall. The different technology
automatically
results in different base material weights. The method
that we have chosen
therefore clearly lowers costs.
-
The tools used in WS coldforming correspond exactly to
the outside of the
elbow, tee or reducer. The result is: a high dimensional
accuracy of the final
product.
-
WS-cold forming eliminates the possibility of mechanical
damage to the
inside of the elbow. Even pipes with extreme diameter/wall
thickness
proportions (DN 5"x1.3" wall thickness) can be formed
without difficulties.
-
The cold forming process chosen and further developed
by us guarantees
an ex-tremely gentle handling of material. The degree
of deformation in radius
direction is almost 0% and in axial direction less than
10%.
-
The WS-cold forming guarantees a low degree of forming.
The material will
not be exposed to thermal stress during the manufacturing
process. The
structure of the formed fittings is absolutely free of
any structure loosening
and micro cracks. The grain structure remains unchanged.
All WS-fittings
with wall thicknesses up to 6 inches are cold formed
and then solution
annealed. This method has numerous advantages over hot
forming, which
has mainly been used up till now. We would like to point
out that the above
cold forming advantages are based on a heavy wall elbow
as an example.
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