sgs industrial services - apren.pt · pdf file2 phased- array- sensors, 2 tofd-pairs, 2...
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SGS INDUSTRIAL SERVICES
Mechanised UT-PA/TOFD Inspection of weld on
monopiles for offshore wind turbines
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CONTENT
Akkreditation
Inspection Process
Rules-Qualification Requirements
Application
Outlook
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Accreditation according DIN EN ISO/IEC 17025, DAkkS
Certification according to DNV (Offshore-Components, App.-Programme
402B)
Certification according to KTA 1401, VGB (nuclear)
Certification according to SCC-Regularien (SCCp)
Certification according to DIN 27201-7 Inspection of railway vehicles
AKKREDITIERUNGEN UND ZERTIFIZIERUNGEN
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Submerged arc welding
max. welding velocity 18 mm/sec
Diameter 2000 – 6000 mm
Thickness t= 60-100 mm
Material S355 bis S460
Expected welding defects
• Systematic Lack of Fusion
• Incomplete Penetration
• Slag inclusion
• Attention
Indications from form an structure
MANUFACTURING
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REQUIREMENTS FOR UT TESTING
Inspection 48h after welding
Inspection on delaminations in area of HAZ
Inspection on longitudinal and transverse defects
Sizing and characterisation of defects
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RULES AND REGULATIONS
DIN EN ISO 13588 Phased Array
DIN EN ISO 10863 TOFD
EN ISO 5817Stufe B and C
EN ISO 11666 Level 2 and 3
Additional: Characterization of defects
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TOFD PROCESS
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TOFD INDICATION TYPICAL
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PHASED ARRAY
Quelle: Olympus
• Range of angles between 40-75°
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2 Phased- Array- Sensors, 2 TofD-Pairs, 2 Transverse defect sensors operating during
one turn of the monopile
Water coupling
Easy change of sensor configuration
SCANNER SYSTEM
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INSPECTION
Inspection can be performed during on turning device or self driven
Scanspeed apr. 22 mm/sec
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SCAN SIMULATION FOR PHASED ARRAY AND
TOFD
100 % Volume
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CALIBRATION BLOCKS
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TOFD INDICATIONS
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PHASED ARRAY INDICATIONS
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17© SGS SA 2013 ALL RIGHTS RESERVED
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SUMMARY IN SERVICE INSPECTION
TOFD/Phased Array (Volume
Defects, Inside cracks)
Additional Eddy Current module for
detection of outside cracks
Without scaffolding (self driven
magnetic wheels)
Results from testing at manufacturing
stage could be considered
Inspection strategy is in development
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PHONE: +49 2323 9265 121
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FAX +49 2323 9265 111
MAILTO : [email protected]