In-depth | COMPOSITE REPAIR
Belzona Polymerics launch new pipe
repair system
Belzona Polymerics Limited unveiled its new ISO, ASME standard compliant
pipe repair system at ONS 2008 in Stavanger.
K-based protective coatings Technology
and polymer repair composites During a presentation at ONS 2008,
Ucompany, Belzona Polymerics Belzona’s Strategic Manager for Oil
Limited, has released SuperWrap, a new & Gas, David Rice, showed Offshore
compliant composite pipe repair system. Marine Technology how the polymer
Developed in accordance with ISO/TS repair composite works. Th e composite
24817 “Composite Repairs for Pipework”, can be applied in a matter of minutes
draft ed by the International Organisation by a licensed and validated applicator,
for Standardization and ASME PCC-2 complying with international composite
Article 4.1 “Repair of Pressure Equipment repair standards and allows corrosion-
and Piping”, drafted by the American damaged components to be back up and Belzona’s new compliant composite
Society of Mechanical Engineers, running within 24 hours. pipe repair system shown on a pipeline
SuperWrap is Belzona’s fi rst composite The strength of the composite has application (credit: Belzona).
repair system to be designed to comply been achieved by using a glass-fibre
with these technical standards. reinforcement. This reinforcement
SuperWrap is suitable for thin- and contains bi-axially orientated fi bres that During the testing, pipe spools with
through-walled defects on Class 1 water reinforce the composite both in axial different diameter circular through-
systems, Class 2 safety-critical systems and circumferential directions. It can be wall defects were repaired using the
and Class 3 hydrocarbon systems. The cut to fi t the application without fraying composite repair system. Aft er full cure
composite is able to withstand pressures of and is both heavyweight and fl exible to fi t had been achieved in each repair, the pipe
250bar and temperatures of up to 85°C. narrow diameter pipes and can be applied spool was then fi lled with water and all
By providing repairing solutions for in situ. outlets sealed. Th e repair was then tested
vessel and pipeline defects, the polymer Rice went on to say: “Having validated to failure by attaching the spool to a
is purported to be capable of a longer engineering design algorithms has hydraulic pump and gradually increasing
asset life than that of the component. moved composite repair into the asset the pressure inside the spool until the
Th e versatility of the polymer composite integrity engineers’ approved options for pressure exceeded the adhesive strength
allows a time-saving alternative to consideration when faced with thinning of the polymer. Th is testing demonstrated
traditional welding. Th e system also allows and or holed pressure systems’ substrates.” that the mode of failure is compliant with
for complex pipeline geometry, such as ASME and ISO standards.
bends, tees and is resistant to a number of Testing For repairs to be fully compliant a design
chemicals, oils and process fl uids. The ISO and ASME standards dictate calculation must be carried out before the
that a wide range of mechanical testing actual repair takes place. Th is calculation
must be carried out to ensure that the will require data such as: the service pressure,
composite complies. The mechanical service temperature, pipe diameter, wall
property testing carried out has in thickness and size and shape of the defect.
the past included determination of Th e calculation will then determine what
shear modulus, flexural modulus, length the thickness should be and the
coefficient of thermal expansion, tensile number of composite layers, or thickness,
shear adhesion and heat distortion required to safely retain the pressure.
temperature. In additional to mechanical Belzona is a founding member of
property testing, extensive pressure the Association of Composite Repair
testing has to be carried out. This testing Suppliers (ACoReS), a group of leading
has used a specially designed hydraulic composite repair manufacturers whose
Complex pipeline geometry can be pressure test rig complete with pressure members undertake audits every two years
accommodated for with Belzona’s gauge, release pressure valve, pipe spool to ensure compliance with new standards
composite system (credit: Belzona). and hydraulic pump. and directives. OMT
10 Offshore Marine Technology 4th Quarter 2008
OOMT_4Q08_p10.indd Sec2:
10MT_4Q08_p10.indd Sec2:10 110/20/08 2:18:25 PM0/20/08 2:18:25 PM
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