TPT May 2009

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May 2009 36
Technology Update
›
European official distributor
impeder cores
U.S.M. Mazzucchelli S.r.l.
USM provides top quality products
and services to the Tube and Pipe
industries worldwide. We have a
wide range of top quality items
and devices for tube
manufacturers’ requirements.
Once our products have been
chosen, we can immediately
deliver them from our stock.
Ferrite cores Impeders
Carbide inserts
HSS blades Guillotine blades Other....
Ceramic rolls Inside tube scarfing Cutting rings
Tool holder Copper inductors
Fibreglass tubes
V.le Lombardia,4 - 20052 Monza - MI - Italy
Tel. +39/039.387282 - 2301687 Fax +39/039.387633
Dhatec, Netherlands, has been working
on an R&D programme for the past five
years, focussing on how to keep line
pipes in optimal condition during and after
manufacturing.
During each segment of the logistic trail,
there is a risk of damaging both the pipe
and its coating layer.
As a result of the R&D programme,
particular problems can be isolated and
professional solutions found. In many cases
During research on the issues that pipe
coating companies worldwide are dealing
with, it became clear that there was a need
for a professional coupling. Line pipes are
seldom straight or exactly round. Many
coating plants deal with stability problems
during the process or air seals underneath
the coating layer as a result of radial pipe
movement. Even severe variations in
FBE coating thickness occur because
the distance from the pipe to the spraying
nozzle in the coating cabin varies due to
pipe movements.
Each coating process is different and
experience and fine tuning are needed to
achieve the best results. However, in many
cases results can be improved if the right
coupling is applied. By connecting pipes
with a coupling, the distance between the
coating cabin and the first pipe supporting
roll afterwards can be increased.
Directly after the cabin, the freshly applied
coating is still weak due to the high
temperature. Each time the pipe weld,
spirally or longitudinally, of the rotating pipe
hits the first support roll, the coating can
dent or damage. By increasing the distance,
Professional pipe coupling for external coating
 Dhatec’s Task Environment, the logistic process of a line pipe
these new solutions do not only safeguard
the quality of the pipe and coating, but
also improve the process itself in terms of
efficiency and safety.
One of the new developments is the
premium pipe coupling. A coupling is used
to line up pipes and protect the bevelled
pipe-end during external coating. This
allows coating plants to achieve the optimal
end quality of the coating application and
enhances stability and efficiency of the
coating process.