TPT September 2016

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80 September 2016
T E CHNOLOG Y
Composite repair system applied to own plant
HENKEL’s main manufacturing plant
in Düsseldorf, Germany, incorporates
18km of pipe bridges and 300km of
pipelines. Over time, sections had
become corroded, and their repair was
subcontracted to the company Xervon.
In order to repair leaks quickly, safely
and sustainably, Xervon used Henkel’s
recently introduced Loctite® Composite
Repair System, also creating a reference
site for the process. The system allows
corroded pipes to be repaired without
interrupting operations, avoiding the
high costs associated with unplanned
shutdowns. It effectively eliminates the
need for pipe sections to be replaced,
and extends the lifetime of the repaired
pipework system.
“Our target is to extend the service
life of pipes by 20 years and we are
confident the Loctite Composite
Repair System will last far beyond
that,” commented Carsten Sperlich,
who heads the technical infrastructure
department at the Düsseldorf site.
The first step of the process is
cleaning, by sandblasting the surface
of the defective pipe section to a
cleanliness level of SIS SA 2.5. The
blasting also produces a roughness of
75 micrometres peak-to-valley height
in the steel surface, and the resulting
surface texture ensures physical
anchoring in addition to the adhesive
bonding with the coating material.
Loctite SF 7515 is applied as a short-
term corrosion inhibitor to prevent flash
rust. The pipe is then wrapped with
several layers of the high strength,
glass-carbon fibre tape Loctite PC
5085, which has been impregnated
with the two-part epoxy resin Loctite PC
7210. Finally, several layers of topcoat
– Loctite PC 7255 – are applied as
corrosion protection.
The repair system has been certified
by DNV CL in accordance with the
global quality standard ISO 24817. This
standard defines the criteria for the use
of composite systems in petrochemical,
oil and gas industries. The method
has also been approved by Lloyd’s
Register, in conformity with ASME PCC-
2 standard, and by TÜV Rheinland.
Xervon, one of a growing number
of service providers that make up the
Henkel Certified Applicator network
across Europe, underwent an extensive
qualification process to achieve the
status. The Composite Repair System is
being used in refineries, petrochemical
plants, power plants and water treatment
systems. Core applications are in the oil
and gas industry, where the system can
be used in all upstream, midstream and
downstream areas.
Henkel AG – Germany
Website:
Manchester Tool and Die
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