CoatingPassport · schema v1.1Demo · Offshore platform jacket

Demo Charlie — Coating Passport

Same canonical CoatingPassport data product as every other Hullproof vertical, applied to a offshore platform jacket. Domain knowledge (applicable standards, severity calibration) is automatically applied via the domain registry — adding a new asset class is a directory, not a rewrite.

Asset

Asset ID
NCS-JACKET-DEMO-001
Type
Offshore platform jacket
Material
coated_steel
Platform name
Demo Charlie
Operator
Demo Energy AS
Installation year
1994
Water depth
112
Inspection cycle
3-yearly IMR

Inspection

Timestamp
Sun, 12 Apr 2026 08:30:00 GMT
Footage source
rov
Duration
73 min
Frames analyzed
131,400
Operator tier
platform
Model version
hullproof-vlm-v2.1.3

Findings summary (5)

0
critical
2
severe
2
moderate
1
minor

Findings detail

crack

confidence 91%47 framesimg-quality 88%severe

Surface-breaking crack, 38 mm length, oriented transverse to weld toe. Consistent with fatigue propagation per DNV-RP-C203 S-N curves for offshore tubular joints.

Location: B2-C2 K-joint, brace-side weld toe (-12.4, 8.1, -42.7)
Recommended action: NDT confirmation (MPI/PA-UT) within 30 days; engineering critical assessment per BS 7910; plan grind-out and re-weld at next planned shutdown.

corrosion

confidence 84%156 framesimg-quality 79%moderate

General corrosion in splash zone, estimated 11–13% wall-thickness loss over a 1.4 m vertical band. Within NORSOK N-005 monitoring threshold but above 10% trigger for accelerated re-inspection.

Location: Leg B2, splash zone (-10.2, 8.1, -18.5)
Recommended action: UT thickness mapping at next dive; assess remaining life vs design fatigue; consider TSA coating retrofit at next campaign.

anode depletion

confidence 96%312 framesimg-quality 92%severe

Sacrificial anode array 76% depleted (4 of 8 anodes fully consumed, 4 partially). Cathodic protection capacity below design margin per DNV-RP-B401.

Location: Leg B2 lower section anode array (-12.4, 8.1, -62)
Recommended action: Plan anode retrofit (clamp-on or pile-driven supplementary) before next inspection cycle; potential survey recommended within 90 days.

marine growth

confidence 88%480 framesimg-quality 85%moderate

Mussel and barnacle growth averaging 80–110 mm thickness on upper jacket members. Hydrodynamic loading per NORSOK N-003 increased by ~8% vs clean-condition baseline.

Location: Jacket upper section, 0–15 m depth band (0, 0, -8)
Recommended action: Schedule hydrodynamic re-analysis at >100 mm threshold; plan growth-removal campaign before next 100-year storm season.

pitting

confidence 79%89 framesimg-quality 74%minor

Localized pitting, max depth 1.6 mm across a 0.3 m² area. Below DNV-RP-B401 immediate action threshold.

Location: Conductor guide C-3 (-8.7, 4.2, -38)
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-OS-J101
  • DNV-RP-C203 (Fatigue design of offshore steel structures)
  • DNV-RP-B401 (Cathodic protection design)
  • NORSOK N-005 (Condition monitoring of load bearing structures)
  • NORSOK M-501 (Surface preparation and protective coating)
  • API RP 2A-WSD
  • PSA Norway Management Regulations §47
  • ISO 19902:2020

Interoperability

Cognite CDF compatible
Yes
OSDU mapping
osdu:reference-data--AssetType:OffshoreFixed: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.

Demo passport generated from fixtures/passports/demo-offshore-jacket-001.ts. Production passports are built by the analysis pipeline via buildCoatingPassport() and validated against the Zod schema at src/lib/passport/types.ts.