CoatingPassport · schema v1.1Demo · Industrial tank

REFINERY-TANK-DEMO-T42 — Coating Passport

API 653 out-of-service internal inspection of a 60 000 m³ crude oil storage tank commissioned in 1997. Drone footage from confined-space inspection. Findings span bottom-plate pitting (>5 mm), phenolic-epoxy lining end-of-life, shell-to-bottom weld corrosion. Severity thresholds applied per API 653 / EEMUA 159.

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Asset

Asset ID: REFINERY-TANK-DEMO-T42
Type: Industrial tank
Material: coated_steel
Operator: Demo Refinery AS

Inspection

Timestamp: Sun, 15 Mar 2026 10:00:00 GMT
Footage source: drone
Duration: 150 min
Frames analyzed: 270,000
Operator tier: enterprise_user
Model version: hullproof-vlm-v2.1.3

Findings summary (4)

critical

severe

moderate

minor

Findings detail

pitting

confidence 93%542 framesimg-quality 87%severe

Pitting cluster with max depth 5.4 mm across a 4.2 m² area of bottom plate. Exceeds API 653 5 mm renewal threshold. Likely under-deposit corrosion from water-bottom over service life.

Location: Tank bottom plate, NE quadrant, plates B7-B9 (22, 31, 0)

Recommended action: Plate replacement at next planned shutdown; consider bottom-replacement vs internal-coating-system upgrade based on API 653 RBI analysis.

coating breakdown

confidence 89%1247 framesimg-quality 83%severe

Internal lining (phenolic epoxy) breakdown estimated 38% in lower shell-course-2 band. Active corrosion visible at breakdown perimeters. Consistent with end-of-life coating per design service window.

Location: Shell course 2, 360° circumferential, lower 1.5 m (0, 0, 4)

Recommended action: Full lower-shell re-lining required before next service. Scope blast-clean + epoxy phenolic system; coordinate with bottom-plate work.

corrosion

confidence 81%312 framesimg-quality 78%moderate

General corrosion at shell-to-bottom weld toe, estimated 22% wall-thickness loss over sample inspection points. Within API 653 monitoring threshold.

Location: Shell-to-bottom weld, full circumference (sample) (60, 0, 0)

Recommended action: UT thickness mapping at next inspection; assess t-min vs design corrosion allowance.

weld defect

confidence 76%67 framesimg-quality 72%minor

Surface porosity along weld seam, ~15 mm length. Below acceptance threshold.

Location: Bottom plate weld B5-B6 seam (12, 18, 0)

Recommended action: Document for trending; no action this cycle.

Compliance

EU AI Act class: high_risk_ai_system
Review workflow: Pending

Applicable standards

• API 653 (Tank inspection, repair, alteration, reconstruction)
• API 650 (Welded steel tanks for oil storage)
• API 620 (Design and construction of large, welded, low-pressure tanks)
• EEMUA 159 (Above-ground steel storage tanks)
• DIN EN 12285 (Workshop-fabricated tanks)
• STI SP001 (Standard for inspection of in-service shop fabricated tanks)

Interoperability

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