TPi July 2015

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July 2015 Tube Products International 43
products & developments
Safety tubes and system efficiency
Wieland Thermal Solutions presented its
GEWA-safe double-wall safety tubes at
ACHEMA in Frankfurt in June.
The GEWA-safe tubes feature defined
leakage paths between the inner and
outer tube for the reliable separation
of fluids, eg reactive, hazardous or
explosive fluids, without the need for
additional circulation (closed loop
intermediate fluid).
This ensures system availability,
efficiency and safety, as damage to
inner or outer tube is immediately
recognisable and can be fixed as part
of regularly scheduled maintenance.
The thermal contact of the two tubes
results in outstanding heat transfer
without additional heat transfer
fluid. GEWA-safe tubes enable the
manufacture of very compact heat
exchangers, reducing material costs
and fill levels.
Depending on the
desired application,
the tubes are available
with either smooth
or profiled surface in
copper, cupronickel
and stainless steel.
The safety tubes are
used, for example, in
the pre-heating of fuel
gas for gas turbines,
for protection against
environmentally harmful and toxic
substances, for the isolation of heat
transfer oil in transformer stations,
and for drinking water protection
according to DIN EN 1717 in heat-pump
systems.
They are also used in so-called safety
heat exchangers for high standards
regarding system safety in chemical
processes, for example in the production
of polysilicon.
Wieland also presented current solutions
for system efficiency increase in the
oil, gas and petrochemical industries,
as well as in the power generation
industries. GEWA-PB tubes enable a
compact design of heat exchanger. The
surface structure of the tube enhances
the effect of nucleate boiling, intensifying
the evaporation process.
For different requirements regarding
thermal conductivity, mechanical
properties and corrosion resistance in
the oil and gas processing industries,
Wieland Thermal Solutions also
presented at ACHEMA its portfolio of
low-finned tubes in a wide range of
materials. GEWA-K, GEWA-KS, and
Trufin S/T and Turbo-Chil tubes are
manufactured in the materials carbon
steel, stainless steel and titanium.
They are mainly used in coolers,
preheaters, condensers and evaporators
to achieve savings in both equipment
and overall plant design.
Wieland-Werke AG – Germany
Low-finned tubes
GEWA-safe double-wall safety tubes