Ultrasonic Inspection
Key Benefits
Detect Wall Thickness Loss and Corrosion Below the Surface
Measure steel thickness and monitor degradation over time.
Supports Class and OEM Structural Requirements
Required for hull plating, braces, risers, and fatigue-critical areas.
Delivered With Calibrated Digital Thickness Meters
Accurate readings across painted and corroded surfaces.
Executed by Divers and/or ROV
Coverage across shallow and deepwater zones.
Repeatable Measurements for Trending and Life Extension
Time-stamped and location-referenced for asset records.
Ultrasonic Inspection
Service Description
We provide Ultrasonic Testing (UTM) across a wide range of submerged steel structures, including hulls, risers, braces, and transition zones. These inspections are essential for identifying wall thickness reduction, monitoring corrosion progression, and confirming structural viability over time.
For any offshore structures including fixed platforms, FPSO’s, floating wind structures, & Semi Submersibles.
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Wall Thickness Measurement Using Ultrasonic Testing Offshore
Ultrasonic Testing (UTM) is a non-destructive method that allows precise measurement of steel thickness without cutting or disassembly. SubseaPartner provides UTM as part of structural integrity campaigns, life extension studies, and class-mandated survey scopes.
We measure:
- Hull plating and shell stiffeners on FPSOs and semi-subs
- Braces, columns, and pontoon walls on semi-submersibles
- Monopile and transition piece steel on offshore wind foundations
- Splash zone riser clamps, padeyes, and support frames
- Caisson walls and conductor guides
Execution methods:
- Diver-deployed ultrasonic thickness gauges for accessible areas
- ROV-mounted UTM tools for deeper or complex locations
- Surface prep using hydraulic or pneumatic brushes prior to measurement
- Grid-based readings with GPS or asset-referenced tagging
- Optional corrosion mapping using multiple reading arrays
Typical applications:
- SPS or class survey wall thickness verification
- Remaining life estimation for hull steel or riser components
- Thickness trending across seasons or campaigns
- Follow-up to general or close visual inspection
- Risk-based integrity model calibration
All UTM campaigns include certified technicians, calibrated instruments, and full traceability logs for comparison with OEM or baseline data.
Operational Scenario
Real Results: UTM Supports Life Extension Across Floating and Fixed Assets.
Challenge
Operator required wall thickness validation across three asset types for a unified integrity assessment.
Solution
SubseaPartner performed diver and ROV-based UTM on FPSO hull plating, semi-sub braces, and offshore wind monopile sections.
Outcome
Consistent readings across campaigns supported re-certification without steel replacement.
Let’s Secure Your Operations
Reach SubseaPartner for ultrasonic inspection services. Our certified teams deliver precise steel thickness measurements, supporting class compliance, corrosion monitoring, and safe offshore operations across FPSOs, semi-subs, and wind assets.
