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Oslo 24.11.2008Oslo 24.11.2008
Seminar for NDT Seminar for NDT NivNivåå 3 3 -- PersonellPersonell
Low Frequent Eddy Current(Lavfrekvent virvelstrøm)
Arild SolbergArild Solberg Mohan KangMohan Kang
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Oslo 24.11.2008Oslo 24.11.2008 ““NivNivåå 3 Seminar3 Seminar””
Content:Content:
•• Introduction Introduction
• HistoryHistory
•• Technology & Reporting PrinciplesTechnology & Reporting Principles
•• EquipmentEquipment
•• ApplicationsApplications
•• Practical demo of technologyPractical demo of technology
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Introduction:Introduction:
Eddy Current Technology (EC)
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Eddy Current Technology (EC),
Standard equipment
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Eddy Current Technology (EC), Special equipmentHeat Exchanger & Boiler Tube InspectionHeat Exchanger & Boiler Tube Inspection
•• Heat exchangersHeat exchangers•• Coolers Coolers •• BoilersBoilers•• CondensersCondensers•• ReactorsReactors•• Air coolersAir coolers•• Separators Separators •• HeatersHeaters•• AirAir--conditioncondition systemssystems•• etc.etc.
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Low Frequent Eddy Current(Lavfrekvent virvelstrøm)
Named:Named:
SLOFECSLOFEC™™
““SSaturation aturation LLow ow FFrequency requency EEddy ddy CCurrenturrent””
The fast inspection screening method for defect detection
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History:History:
SLOFECSLOFEC™™““Saturation Low Frequency Eddy CurrentSaturation Low Frequency Eddy Current””
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SLOFECSLOFEC™™ TechnologyTechnology
19931993Problem:Problem: Inspection of Nuclear Power Plant Inspection of Nuclear Power Plant -- underground cooling underground cooling
water pipes from inside without removal of inner coating, water pipes from inside without removal of inner coating, detecting external corrosiondetecting external corrosion
Pipe O.D.Pipe O.D. up to 4mup to 4mPipe wall thicknessPipe wall thickness up to 32mmup to 32mmInner coating Inner coating thickness ~ 3 thickness ~ 3 -- 4mm, epoxy type4mm, epoxy typeDetected defectsDetected defects Ext. defects from 30% wall LossExt. defects from 30% wall Loss
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SLOFECSLOFEC™™ TechnologyTechnology
19961996Problem:Problem: Inspection of buried and half buried storage vesselsInspection of buried and half buried storage vessels
from inside, detecting external corrosionfrom inside, detecting external corrosion
Storage vessel :Storage vessel : ØØ ~ 4.500mm; ~ 4.500mm; WT 18mmWT 18mm
Detected defects:Detected defects: ext. defects 30%, ext. defects 30%, corrosioncorrosion
Time for inspection: ~ 3 shifts per vesselTime for inspection: ~ 3 shifts per vesselEntrance : Entrance : ØØ 550mm manhole550mm manhole
55% 55% reductionreductionof of inspectioninspection
costscosts
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SLOFECSLOFEC™™ TechnologyTechnology
19971997 World Wide evaluation of Petroleum Association of Japan World Wide evaluation of Petroleum Association of Japan Evaluation:Evaluation: Tank floor inspection methods / systemsTank floor inspection methods / systems
Criteria: Criteria: sensitive , economical, handlingsensitive , economical, handlingSuccess: Success: SLOFECSLOFEC™™ evaluated for inspection evaluated for inspection
regulation by laboratory and field testsregulation by laboratory and field tests
TEST TEST RESULTS:RESULTS:Plates wt 9mm, 12mm, 21mm Plates wt 9mm, 12mm, 21mm Coating 1 Coating 1 -- 3mm3mm
Smallest detected underside defects:Smallest detected underside defects:
wt 9mm wt 9mm -- ØØ 2mm, depth 20%2mm, depth 20%
wt 12mm wt 12mm -- ØØ 2mm, depth 20%2mm, depth 20%
wt 21mm wt 21mm -- ØØ 4mm, depth 20%4mm, depth 20%
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SLOFECSLOFEC™™ TechnologyTechnology
2000 SHELL - Expro Brent Field Project: Inspection of Oil Rundown Lines in concrete legs
Evaluation of SLOFEC™ Pipe Scan sensitivity - result : qualified
Success: Inspection of pipes up to OD 30”; up to wt 26mmcoatings/wrap. up to 5mm
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SLOFECSLOFEC™™ TechnologyTechnology
Main targets for SLOFECSLOFEC™™ inspections are:
- Detection & identifying of localised corrosion areas (sensitive to localised defects, pitting, MIC, etc.)
- Fast scanning to receive a quick condition overview- Scanning through coatings to avoid removing it
1.000
2.000
2.500
00°90°180°270°360°
Scan
Len
gth
Pipe Circumference
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Technology & ServicesTechnology & Services
Corrosion Detection & Screening Corrosion Detection & Screening
Corrosion detection Corrosion detection & screening& screening
at at Tanks,Tanks,
Vessels, Separators Vessels, Separators
Pipes, Pipelines, etc.Pipes, Pipelines, etc.
withwith
SLOFECSLOFEC™™TechnologyTechnology
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Technology & Reporting Principles:Technology & Reporting Principles:
SLOFECSLOFEC™™““Saturation Low Frequency Eddy CurrentSaturation Low Frequency Eddy Current””
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SLOFECSLOFEC™™ TechnologyTechnology
EDDY CURRENT SENSORS
MAGNET
TEST PIECEMAGNETIC
FIELD LINES DEFECT COMPRESSED MAGNETIC FIELD LINES
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SLOFECSLOFEC™™ TechnologyTechnology
Response of the Differential Eddy Current Coil System Response of the Differential Eddy Current Coil System (with SLOFEC(with SLOFEC™™) to detect Local Defects) to detect Local Defects
Scan direction
S igna
lAmp
litude
Signal Response of the Differential Channel
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ inspection makes use of Eddy Current Differential inspection makes use of Eddy Current Differential Channel for detection of localized material changes (Defects)Channel for detection of localized material changes (Defects)
Signal response to a local and gradual defectSignal response to a local and gradual defect
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Comparison Method Comparison Method -- CalibrationCalibrationCalibration with artificial Calibration with artificial reference defectsreference defects
Evaluation of indications in Evaluation of indications in comparison to calibrationcomparison to calibration
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Sensitivity TestSensitivity Test
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Accuracy TestAccuracy Test
20%
20%
40%
60%
80%
100%
mechanic measured defect depth[% of the nominal wall thickness]
Def
ect D
epth
eva
luat
ed b
y th
e SL
OFE
C S
yste
m[%
of t
he n
omin
al w
all t
hick
ness
]
40% 60% 80% 100%
P9
P11a&b
P6
P3
P8P5
P2
P16
P7P4 P21
P1
P10a
P12a&b
Ground Truth Diagram Ground Truth Diagram for Ground Truth Diagram for comparison SLOFECcomparison SLOFEC™™evaluated to measured evaluated to measured defect depthdefect depth
performed with SHELL Global performed with SHELL Global Solutions (Amsterdam)Solutions (Amsterdam)
example:example:plate thickness plate thickness 18mm material ST35.818mm material ST35.8
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Confirmation of Detected DefectsConfirmation of Detected Defects
Tank floor: Tank floor: Chemical PlantChemical PlantPlate thickness: Plate thickness: 12mm12mmCoating : Coating : Rubber, 10mm thickRubber, 10mm thickDefects :Defects : Corrosion pits fromCorrosion pits from underside, underside,
2020--30% loss, additional through 30% loss, additional through holes foundholes found
Confirmed :Confirmed : by UTby UT
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Distinction Distinction -- Underside / Topside DefectsUnderside / Topside Defects
Artificial defect (dia. 10mm) at Artificial defect (dia. 10mm) at the underside side depth 40%the underside side depth 40%
Topside corrosion Topside corrosion Corrosion Corrosion pitpit diameter 15mm, depth 20%diameter 15mm, depth 20%
SignalSignaldisplay of display of UNDERSIDE UNDERSIDE DEFECTSDEFECTS
VERTICAL SIGNAL VERTICAL SIGNAL ORIENTATIONORIENTATION
SignalSignaldisplay of display of TOPSIDE TOPSIDE DEFECTSDEFECTS
HORIZONTAL SIGNAL HORIZONTAL SIGNAL ORIENTATIONORIENTATION
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Field inspection results compared to UT resultsField inspection results compared to UT results
Project: Project: Result comparison UT mapping , Result comparison UT mapping , -- SLOFECSLOFEC™™ results results -- UT reUT re--inspection results of SLOFECinspection results of SLOFEC™™ detected defects detected defects
Object:Object: Offshore knock out drum (wt 25mm)Offshore knock out drum (wt 25mm)
SLOFEC Comparison
05
1015202530
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18Grid No
mm
AEA minSLOFEC
SLOFEC Comparison
05
1015202530
1 3 5 7 9 11 13 15 17
Grid No
mm
AEA minSLOFECSLOFEC UT
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SLOFECSLOFEC™™ TechnologyTechnology
Relative Sensitivity Curve, in comparison to MFLRelative Sensitivity Curve, in comparison to MFL
Wall thickness [mm]
MFLSLOFEC
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36Rel
ativ
e D
etec
tion
Sens
itivi
tyR
elat
ive
Det
ectio
n Se
nsiti
vity
2d
WT
d
d / WT = detect ability [%]
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SLOFECSLOFEC™™ TechnologyTechnology
SCANNING SCANNING
SOFTWARE & REPORTINGSOFTWARE & REPORTING
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SLOFECSLOFEC™™ TechnologyTechnology
Scan & Scan Imaging SoftwareScan & Scan Imaging Software
or
Scan Software Indication Scan Software Indication --display while scanningdisplay while scanning
Scan Imaging Software Scan Imaging Software for coloured condition imagingfor coloured condition imaging
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SLOFECSLOFEC™™ TechnologyTechnology
Colour ImagingColour Imaging -- Defect ClassificationDefect Classification
COLOUR PALETTE – DEFECT CLASSIFICATION:
Display of indication amplitude analysis, representing wall loss in comparison to reference
< 20% 20 - 30% 30-40% 40-50% >50%
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SLOFECSLOFEC™™ TechnologyTechnology
Colour ImagingColour Imaging -- Tank Floor InspectionTank Floor Inspection
Tank Floor Scan Defect Mapping Tank Floor Scan Defect Mapping ColourColour details for defect imagingdetails for defect imaging
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SLOFECSLOFEC™™ TechnologyTechnology
Colour Colour Imaging Imaging -- Tank Floor InspectionTank Floor Inspection
Tank floorTank floor--Single Plate Scan ReportSingle Plate Scan Report
Colour details for defect imagingColour details for defect imaging
Including details of Including details of UT UT -- verified indicationsverified indications
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SLOFECSLOFEC™™ TechnologyTechnology
Colour ImagingColour Imaging -- Pipe InspectionPipe Inspection
20-3
0%
30-4
0%
40-6
0%
< 20
%
> 60
%
Signal of the reference internal defect (50%depth) inthe signal Y-component / phase analyse window
Sec
tion
12.
230m
mS
ectio
n 2
1.90
0mm
Sec
tion
33.
685m
mSe
ctio
n 4
2.72
0mm
14
13
15
16
17
18
19
20
21
22
23
Distance to GTF[meter]
Flange Weld (FW)
Top of steel (TOS)
Section 5450mm
24
25
26
27
28
29
30
31
32
33
34
Client :
Location :
Subject :
OIL COMPANY
Oil Rundown Lines
REFINERY
Section : 4
Date :
K-No. :
. :
July/Agust 2000
105/00
Pipe Identif P-53
SLOFEC - PipeScan ReportTM
Colored defect Colored defect
map from a inspected map from a inspected
pipe sectionpipe section
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SLOFECSLOFEC™™ TechnologyTechnology
Colour ImagingColour Imaging -- Pipe InspectionPipe Inspection
Leng
th2.
000m
m
Dia
met
er o
f the
pipe
: 30
”
Signal component Y-axis set forindications of subsurface corrosion
20-3
0%
30-5
0%
50-7
0%
< 20
%
> 70
%
Length Position
Axia
l dire
ctio
n
Scan Direction
Uninspected area
LongitudinalWeld
Support Beam
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SLOFECSLOFEC™™ TechnologyTechnology
Colour ImagingColour Imaging -- Defect ProgressionDefect Progression
1.000
2.000
2.500
00°90°180°270°360°
Scan
Len
gthPipe Circumference
1.000
2.000
2.500
00°90°180°270°360°
Scan
Len
gth
Pipe Circumference
Scan Scan -- Inspection 1Inspection 1 Scan Scan -- Inspection 2Inspection 2
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Equipment:Equipment:
SLOFECSLOFEC™™““Saturation Low Frequency Eddy CurrentSaturation Low Frequency Eddy Current””
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ EquipmentEquipment
Pole Shoes,Pole Shoes,SensorsSensorsWheelsWheels
ScannersScanners
Computerized ET SystemComputerized ET System
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SLOFECSLOFEC™™ TechnologyTechnology
Tank floor Scanner FS400Tank floor Scanner FS400
SLOFECSLOFEC™™ Floor Scanner Floor Scanner 400mm width400mm width8 EC Sensors8 EC Sensors SLOFECSLOFEC™™ eddyMaxeddyMax
computerized eddy current systemcomputerized eddy current system
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SLOFECSLOFEC™™ TechnologyTechnology
FEATURES:FEATURES:
Materials:Materials: fefe-- and and nn--fefe materials materials Plate thickness:Plate thickness: up to 32 mm (up to 32 mm (fefe--materials)materials)Coating types:Coating types: all all electrelectr. non conductive. non conductiveCoating thickness:Coating thickness: up to 10 mm (field experience)up to 10 mm (field experience)Operation:Operation: 2 men2 menCleaning: Cleaning: free of mud / broom cleanedfree of mud / broom cleanedScanScan--coverage:coverage: dead zones dead zones -- edgesedgesDefect detection:Defect detection: in bear metal, in bear metal,
in overlapped plates, in overlapped plates, at annular plates up to 30 mm at annular plates up to 30 mm distance to the shelldistance to the shell
Productivity:Productivity: depending of tank size depending of tank size ~ 400m~ 400m²² -- 600m600m²² /shift/shift
Tank floor Scanner FS400Tank floor Scanner FS400
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SLOFECSLOFEC™™ TechnologyTechnology
Tank floor Scanner FS300Tank floor Scanner FS300FEATURES:FEATURES:
Materials:Materials: fefe-- and and nn--fefe materials materials Plate thickness: Plate thickness: up to 15 mm (up to 15 mm (fefe--materials)materials)Coating types: Coating types: all all electrelectr. non conductive. non conductiveCoating thickness: Coating thickness: up to 6 mm (field experience)up to 6 mm (field experience)Operation:Operation: 2 men2 menCleaning: Cleaning: free of mud / broom cleanedfree of mud / broom cleanedScanScan--coverage: coverage: dead zones dead zones -- edgesedgesDefect detection: Defect detection: in bear metal, in bear metal,
in overlapped plates, in overlapped plates, at annular plates 15 mm at annular plates 15 mm
Productivity: Productivity: depending of tank size depending of tank size ~ 300m~ 300m²² -- 500m500m²² /shift/shift
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanner PS 200Pipe Scanner PS 200
Type:Type: Electromagnet Electromagnet Input :Input : 110/220V AC110/220V ACWT Range: up to 26mmWT Range: up to 26mmAdapt ions: Adapt ions: 44”” to flat to flat
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanner LS 150Pipe Scanner LS 150
Type:Type: Electro MagnetElectro MagnetWT Range: up to 18mmWT Range: up to 18mmAdapt ions: 4Adapt ions: 4”” to flatto flat
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanner LS 120Pipe Scanner LS 120
Type:Type: Permanent MagnetPermanent MagnetWT Range: up to 12,5mmWT Range: up to 12,5mmAdapt ions: 2Adapt ions: 2”” to flatto flat
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanner LS 100Pipe Scanner LS 100
Type:Type: Permanent MagnetPermanent MagnetWT Range: up to 9mmWT Range: up to 9mmAdapt ionsAdapt ions: 1: 1”” to flat to flat
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SLOFECSLOFEC™™ TechnologyTechnology
Scanner TWC 20Scanner TWC 20
Self driving scanner for i.e. Self driving scanner for i.e. vertical surfaces vertical surfaces
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ Sub seaSub sea ScannerScanner
Target: Inspecting Riser Pipe/Caissons through Coatings & MarineTarget: Inspecting Riser Pipe/Caissons through Coatings & Marine growthgrowth
Test Results e.g.: Test Results e.g.: 1212”” Pipe x WT 20mm , Coating 15mmPipe x WT 20mm , Coating 15mmDetected Internal pits:Detected Internal pits: ØØ 15mm, detected from 20% wall loss15mm, detected from 20% wall loss
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SLOFECSLOFEC™™ TechnologyTechnology
Internal pipe inspections, examples Internal pipe inspections, examples
Eddy Current & SLOFEC Internal Eddy Current & SLOFEC Internal Internal Pipe Scanner i.e. 16Internal Pipe Scanner i.e. 16”” pipepipe
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Applications:Applications:
SLOFECSLOFEC™™““Saturation Low Frequency Eddy CurrentSaturation Low Frequency Eddy Current””
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SLOFECSLOFEC™™ TechnologyTechnology
““TANKFLOOR INSPECTIONTANKFLOOR INSPECTION””
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SLOFECSLOFEC™™ TechnologyTechnology
Inspection of Storage TanksInspection of Storage Tanks
Tank floorsTank floors
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SLOFECSLOFEC™™ TechnologyTechnology
Inspection of Storage Tanks Inspection of Storage Tanks -- wallswalls
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SLOFECSLOFEC™™ TechnologyTechnology
““PIPE INSPECTIONPIPE INSPECTION””
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Target: Screening of pipe bottom Pipe: 24“ Naphtha Line ; WT : 1/2 „Detected defects: 20% wall loss from inside, Ø 4mm,
mainly CO² corrosion 6`clock lineTime of inspection: ~ 15 min. for 9m (180° coverage)
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Process pipe workProcess pipe work
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Inspection at temperature 80°C
Target: Detection of MIC (Micro Biological Corrosion) in early stage. A tool as early warning of corrosion
Pipe dia.: 16“WT: 13mmDetected defects: 15% wall loss from inside
2-3mm in diameterTime of inspection : 20min. for 6m (360° coverage)
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Target: Target: Internal corrosion screening / detection of Internal corrosion screening / detection of galvanised fire water pipesgalvanised fire water pipes
Pipes:Pipes: ~ 2~ 2““ --1010““ ; WT : up to 9mm; WT : up to 9mmDetected Detected defects:defects: 20% 20% -- 30% int. wall loss, from ~ 30% int. wall loss, from ~ ØØ 3mm3mm
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Target: Screening of furnace tubes from outside
Pipe: 6“ Furnace Tube; WT : 9mmDetected defects : 20% int. wall loss, from Ø 3mm,
massive corrosion at furnace sideTime of inspection : ~ < 10 min. for 12m (180° coverage)
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SLOFECSLOFEC™™ TechnologyTechnology
““PIPE INSPECTIONPIPE INSPECTION””
Example scanning speedExample scanning speed
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Project:Project: Inspection of Oil Rundown Lines in concrete legs Inspection of Oil Rundown Lines in concrete legs Evaluation of SLOFECEvaluation of SLOFEC™™ Pipe Scan sensitivity Pipe Scan sensitivity -- result : qualifiedresult : qualified
Success:Success: Inspection of pipes Inspection of pipes up to OD 30up to OD 30””; up to wt 26mm; up to wt 26mmcoatings/wrappings up to 5mmcoatings/wrappings up to 5mm
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Pipe work inspected by SLOFEC, Pipe work inspected by SLOFEC, in the shaft of a concrete in the shaft of a concrete platform structureplatform structure
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Inspection Pipe Inspection –– Project reportingProject reporting
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Sea water lift Caissons inspection Sea water lift Caissons inspection performed with SLOFEC Technologyperformed with SLOFEC Technology
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Example Inspection of CaissonsExample Inspection of Caissons
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
CupCup--typetype PitsPits
Pit ClustersPit Clusters
Sandblasted internal pipe surface Sandblasted internal pipe surface
with detected MICwith detected MIC
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SLOFECSLOFEC™™ TechnologyTechnology
Pipe Scanning Pipe Scanning -- ExamplesExamples
Cut of pipes withCut of pipes withchloride corrosionchloride corrosion
Target: Target: Stainless SteelStainless Steel Pipes (Offshore)Pipes (Offshore)Chloride corrosion detection Chloride corrosion detection and depth determination and depth determination
Pipes:Pipes: 11““ --1010““ ; WT : up to 11mm; WT : up to 11mm
Detected Detected defects:defects: Chloride Corrosion fromChloride Corrosion from
20% 20% -- 30% wall loss30% wall loss
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SLOFECSLOFEC™™ TechnologyTechnology
““VESSEL & TANK INSPECTIONVESSEL & TANK INSPECTION””
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SLOFECSLOFEC™™ TechnologyTechnology
Vessel Inspection Vessel Inspection -- ExamplesExamples
Vessel: Production Vessel Ø 2.800mm; WT: 13mm; Temp.: 120°CDetected defects : Isolated pits 20% int. wall loss from Ø 4mm,
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SLOFECSLOFEC™™ TechnologyTechnology
Vessel Inspection Vessel Inspection -- ExamplesExamples
Vessel :Vessel : Knockout Drum (offshore) Knockout Drum (offshore) ØØ 2.600mm; WT : 252.600mm; WT : 25--28mm28mminternal stainless steel linerinternal stainless steel liner
Detected defects:Detected defects: Internal defects 30% int. wall loss, isolated pits, cor. areasInternal defects 30% int. wall loss, isolated pits, cor. areasTime for inspection:Time for inspection: 3 3 -- 4 shifts for 2 drums4 shifts for 2 drums
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SLOFECSLOFEC™™ TechnologyTechnology
Vessel Inspection Vessel Inspection -- ExamplesExamples
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™
““CONCLUSIONCONCLUSION””
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SLOFECSLOFEC™™ TechnologyTechnology
Conclusion of SLOFECConclusion of SLOFEC™™
-- Fast corrosion screening method for local metal lossFast corrosion screening method for local metal loss
-- Inspection of thick wall components (up to 32 mm)Inspection of thick wall components (up to 32 mm)
-- Inspection through thick coating (up to 10 mm)Inspection through thick coating (up to 10 mm)
-- High defect detection sensitivity High defect detection sensitivity
-- Distinction between topside and bottom defectsDistinction between topside and bottom defects
-- Colored condition mappingColored condition mapping
-- High potential for additional applicationsHigh potential for additional applications
-- Inspection at higher temperatures (experience up to 130Inspection at higher temperatures (experience up to 130°°C)C)
-- Inspection of Fe Inspection of Fe -- & Non Fe & Non Fe –– Materials (CS, Duplex, Stainless)Materials (CS, Duplex, Stainless)
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SLOFECSLOFEC™™ TechnologyTechnology
Other applications by use of SLOFECOther applications by use of SLOFEC™™
-- Sub sea inspections (Riser pipes, Caissons, etc.) Sub sea inspections (Riser pipes, Caissons, etc.)
-- Spherical tank inspection Spherical tank inspection
-- Duplex Material InspectionDuplex Material Inspection
-- Internal pipe inspectionsInternal pipe inspections
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SLOFECSLOFEC™™ TechnologyTechnology
SLOFECSLOFEC™™ PipeScanningPipeScanning -- Examples Examples
DUPLEX / SUPER DUPLEXDUPLEX / SUPER DUPLEX
Ø2mmD 3mm
Ø3mmD 3mm
Ø2mmD 3mm
4 x Ø 3mmTWH
4 x Ø 5mmTWH
Ø8mmD 12mm
Ø5mmD 12mmØ
3mmD 12mm
Ø8mmD 9mm
Sensitivity Test at Duplex & Sensitivity Test at Duplex & Super Duplex PipesSuper Duplex Pipes
1010”” x WT 4.19mmx WT 4.19mmSmallest internal defect detected:Smallest internal defect detected:ØØ 2mm , Depth 24%2mm , Depth 24%
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For further information, kindly contact:For further information, kindly contact:
KTN AS KTN AS Fjøsangervn. 50P.Boks 6078 Postterminalen5892 BergenNORWAY
Phone: + 47 55205300 E-mail: [email protected]
www.ktn.no
Technology & ServicesTechnology & Services
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