CoatingPassport · schema v1.1Demo · Offshore wind monopile

Demo North Sea Wind — Coating Passport

Same canonical CoatingPassport applied to an offshore wind monopile foundation undergoing 5-yearly UWILD. Findings emphasize the transition-piece grouted connection — a known industry hot-spot per DNV-RP-0419 — with severity calibrated to DNV-RP-C203 fatigue assessment thresholds. The data product slots directly into the wind operator's existing inspection-management stack via Cognite CDF or OSDU exports.

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Asset

Asset ID: NSW-MONOPILE-DEMO-A17
Type: Offshore wind monopile
Material: coated_steel
Wind farm: Demo North Sea Wind
Turbine position: A17
Operator: Demo Renewables AS
Installation year: 2019
Water depth: 32
Inspection cycle: 5-yearly UWILD

Inspection

Timestamp: Sun, 22 Mar 2026 11:00:00 GMT
Footage source: rov
Duration: 120 min
Frames analyzed: 216,000
Operator tier: enterprise_user
Model version: hullproof-vlm-v2.1.3

Findings summary (5)

critical

severe

moderate

minor

Findings detail

fatigue damage

confidence 82%67 framesimg-quality 85%moderate

Visible degradation of upper grout seal with indications of cyclic loading marks. Cumulative damage index estimated 0.55 based on operational hours and DNV-RP-C203 S-N curves for grouted connections.

Location: Transition piece grouted connection, upper sealing (0, 0, 24.5)

Recommended action: Detailed UT scan of grouted interface at next campaign; review fatigue assessment in light of operational data; consider strain gauge installation for ongoing monitoring.

corrosion

confidence 88%421 framesimg-quality 83%moderate

General atmospheric corrosion in splash zone, estimated 7% wall-thickness loss over a 5 m vertical band. Within DNV-ST-0126 design corrosion allowance.

Location: Splash zone, 17-22 m above mudline (0, 0, 18)

Recommended action: Confirm UT thickness mapping at next 5-yearly inspection; assess vs design life remaining.

anode depletion

confidence 94%198 framesimg-quality 90%moderate

Sacrificial anode bracelet 58% depleted. On track with 25-year design life CP allocation, but approaching mid-life retrofit window.

Location: Lower CP anode bracelet (0, 0, 5)

Recommended action: Plan CP retrofit design study within next 24 months; supplementary anode installation likely required before year 15.

marine growth

confidence 91%567 framesimg-quality 86%severe

Mussel + barnacle growth 110-140 mm thickness. Exceeds 100 mm hydrodynamic re-analysis threshold per DNV-ST-0126 + NORSOK N-003 conventions.

Location: Upper monopile 10-20 m depth band (0, 0, 12)

Recommended action: Trigger hydrodynamic load re-analysis for current fatigue assumptions; assess economic case for growth-removal campaign before next 100-year storm season.

coating breakdown

confidence 78%84 framesimg-quality 79%minor

Localized coating breakdown ~3% over a 4 m² area. Below intervention threshold.

Location: Atmospheric zone above splash, NORSOK M-501 system (0, 0, 26)

Recommended action: Monitor at next inspection; no action required this cycle.

Compliance

EU AI Act class: high_risk_ai_system
Review workflow: Pending

Applicable standards

• DNV-ST-0126 (Support structures for wind turbines)
• DNV-RP-C203 (Fatigue design of offshore steel structures)
• DNV-RP-0419 (Analysis of grouted connections)
• DNV-RP-B401 (Cathodic protection design)
• IEC 61400-3 (Wind energy generation systems — offshore)
• BSH Standard Design Offshore Wind
• ISO 19902:2020
• NORSOK M-501 (Surface preparation and protective coating)

Interoperability

Cognite CDF compatible: Yes
OSDU mapping: osdu:reference-data--AssetType:WindFoundation:1.0.0
Veracity export: Not exported
Knowledge graph: Not generated

The same JSON powers Cognite CDF Asset+Timeseries, OSDU exports, RDF knowledge graphs, and MCP-tool calls from agentic systems. PDF is a renderer of this; never the source.