A presentation of our Structural Health Monitoring Solutions for Offshore Platforms, presented at the 2019 Offshore Mediterranean Conference in Italy.

1. 1
STRUCTURAL HEALTH
MONITORING SOLUTIONS
FOR OFFSHORE PLATFORMS
EUGENIO CENTENARO, SGS ITALIA SPA
MARC LANY, AIMSIGHT LTD.
THOMAS MEYER, SGS GROUP
MANAGEMENT LTD.
ENRICO GASPARIN, AIMSIGHT LTD
OMC, RAVENNA, ITALY, MARCH 27-29, 2019

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INNOVATIVE INSPECTION & CRACK MONITORING
How can I run an underwater
inspection with no
operational impact?
How can I handle a crack
identified during the inspection?
ROV-based advanced eddy
current inspection
Real-time monitoring of crack
growth or crack initiation
How do I ensure safe
operations while reducing
downtime?

3. 3
ROV-based advanced eddy current inspection

4. 4
EDDY CURRENT - THEORETICAL BACKGROUND
Eddy current induction principle
Direction of the variation observed
on the impedance plane, in case of
change of material parameters
 Non-contact technique: Works through coating and marine life
residue
 Well established (>50 years) and standardized (ISO, BS etc.)
 Same physical principle as ACFM

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UNDERWATER EC INSPECTION SOLUTION
STATE OF THE ART
Inspection-related downtime
 Conventional PT & MPI:
Downtime due to dry-docking
and surface preparation (high-
pressure cleaning, sandblasting)
 Inspection with divers: No
drilling allowed during dives
 Expensive underwater
cleaning operations (marine
growth removal, cleaning to bare
metal)
SGS-AIMsight solution benefits
 ROV-based advanced eddy
current inspection
 Compatible with drilling
operations
 Reduced surface preparation
needs
 Traceable through full digital
record

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UNDERWATER EC INSPECTION SOLUTION
HARDWARE & RESULTS
Underwater EC instrument (UWEC)
with 12mm, 20mm and 40mm probes
Operate down to 2000m depth – Ocean-
floor version on demand
S235 steel A5 reference block
compliant with ISO 15542-2.
Inspection with 40mm underwater
probe at 200 kHz scan with 6mm lift-off.
 Optimized for real-world POD
 Evolution of the BS1711 standard

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UNDERWATER EC INSPECTION SOLUTION
EXAMPLE
Jack-up rig chord inspection with UWEC probe Compatible with the smallest
observation-class ROVs
Used on North Sea and Persian Gulf jackup rigs for over 2 years

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Real-time crack monitoring

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CRACK MONITORING SOLUTION
STATE OF THE ART
Crack discovery-related downtime
 Risk of downtime while planning
for repairs or waiting for
replacement
 Potentially drastic impact on the
availability of the infrastructure
SGS - AIMsight solution benefits
 Achieve compliance through live
monitoring monitoring of the crack
propagation, initiation or re-
initiation
 Complies with eddy current
inspection standards
 Continuous monitoring of simple
repairs (drill-stop hole)
 Especially advantageous
underwater, as welding in not
accepted

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CRACK MONITORING SOLUTION
HARDWARE
Crack monitoring sensor: electronics and sensor array design
Crack monitoring system topology - Single tether through the splashing zone

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CRACK MONITORING SOLUTION
MEASUREMENTS
Crack length reconstruction principle Live fatigue crack propagation
measurement on pipeline weld

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CRACK MONITORING SOLUTION
EXAMPLE
Crack monitoring
system installed
on highway bridge
in Germany
No crack growth
measured over
more than 8
months

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CRACK MONITORING SOLUTION
OFFSHORE APPLICATIONS
Jack-up rig - Areas of interest for Offshore Structural Health Monitoring (OSHM)
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RMS
6

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CRACK MONITORING SOLUTION
OFFSHORE APPLICATIONS
Offshore Structural Health Monitoring solution (OSHM)
Signal conditioning electronics
Magnetic cable/
instrument holders
Crack Monitoring Array Probe

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THE FUTURE OF NDT
Square 256-element flexible eddy current
array with a coverage of 160mm by 160mm
3D NDT defect mapping – Full traceability
and reproducibility
 Experience the future of NDT through the hands-on demos at our booth

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THANK YOU
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