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July 2008 Tube Products International
59
T
he use of fibreglass in the construction of
pipelines is increasing, particularly in the power
industry, because the material is insensitive to the
exposure of raw gas, heat, chemical and physical
influences.
Lightweight and favourable handling characteristics
allow rapid assembly, resulting in economic
savings.
Pipes from Fiberpipe, Germany, a specialist in
fibreglass pipelines, are manufactured through a
network of worldwide partners. By adhering to ISO
dimensions, the pipes are completely compatible
with existing systems. Customisation is part of the
company’s core business.
The following examples illustrate how fibreglass
pipelines and devices became established in the
power industry.
Temperature resistance with chemical
barrier: flue gas preheating in a coal
power plant
For the replacement of the gas preheaters of the
flue gas desulpherising plant (FGD) in the coal
power plant of RWE Power, Germany, Alstom
Power Recovery was the awarding authority for
Fiberpipe. The coal blocks use hard coal in the
world’s largest molten ash chamber boiler of this
construction type.
Out of procedural view it makes sense to preheat
pure gas – ie raw gas after it has been cleaned.
Therefore a gas preheater was constructed,
feeding the gas streams against each other, where
the raw gas cools down and the pure gas warms
up. The combustion air from the boiler should run
through pipes, resistant to a temperature of 160°C.
Corrosion resistant pipelines:
solutions in the power industry
▲
Precisely tailored prefabrication: closed circular pipeline in a cooling tower