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Powering Asset Integrity: Actionable Knowledge from PetroBot Team. Know-how of Robotics and Corrosion Engineering by our Engineers.

Guides for inspection, robotics, data and visualization teams

Inspection Knowledge Hub

Technical notes for asset owners and inspection engineers working with robotic NDT, field data and reporting workflows.

Tank Integrity16 min read|Sep 25, 2026

Storage Tank Shell UT Mapping: Course-by-Course Workflow

A tank-shell thickness spreadsheet is only as strong as its location record. Map every valid UT result—and every blocked or rejected location—to a named course, plate, elevation and permanent circumferential datum.

  • A thickness value without a reconstructable course, plate, elevation and circumferential position is weak evidence.
  • Map visual observations, valid UT, rejected responses and inaccessible areas in one coordinate system.
  • Choose coverage from the credible damage mechanisms and the decision the owner must make, not from probe convenience.
Illustration of an aboveground steel storage-tank shell with visible courses, seams, appurtenances and weathered coating
Illustration of a process-piping elbow with visible weld boundaries and weathered coating for UT thickness-mapping planning
NDT Methods16 min read

Piping Elbow Wall-Thinning: UT Mapping Workflow

A straight-run thickness trend cannot speak for an unmeasured elbow. Give the fitting its own coordinate system, prove each UT response, expand around credible lows and report every surface the probe or crawler could not cover.

Piping elbowsWall thinning
Illustration of directional wear on the sootblower-facing side of tubes in a dense second-pass boiler bank
Boiler Inspection17 min read

Sootblower Erosion Inspection: Visual + UT Workflow

Sootblower and fly-ash erosion follow impact direction, not the easiest inspection route. Map the exposed tube faces, use remote visual evidence to target valid UT, and keep every blocked row or rejected response visible.

Sootblower erosionBoiler tubes
Illustration of repeatable ultrasonic thickness locations referenced from a fixed weld datum on industrial piping
Inspection data quality16 min read

UT Corrosion-Rate Trending: Comparable Thickness Data

Before subtracting two UT readings, prove they describe the same metal under a compatible measurement setup. Control location, validity, coverage, physical changes and inspection history first.

UT corrosion trendingThickness monitoring
Illustration of localized corrosion where a process pipe rests on a steel support
Pipeline inspection16 min read

Pipe Support Corrosion Inspection: Trunnions and UT

Plan pipe-support and trunnion corrosion inspections with focused visual checks, valid UT coverage, clear no-data zones and qualified follow-up.

Pipe support corrosionTrunnions
Illustration of an external floating-roof tank deck with pontoons, an access ladder, fittings, and standing water
Tank Integrity17 min read

External Floating-Roof Tank Inspection: Visual + UT Plan

Build a decision-ready external floating-roof inspection plan that separates visual observations, qualified UT readings, coverage gaps and roof-integrity decisions.

External floating roofTank roof inspection
Illustration of staining around a capped dead-leg branch on process piping
Pipeline inspection17 min read

Dead-Leg Corrosion Inspection: Robotic UT Mapping

A practical dead-leg corrosion inspection workflow for mapping risk features, UT coverage, valid readings and exclusions beyond sparse spot checks.

Dead-leg corrosionProcess piping
Illustration of sediment and coating wear across the submerged floor of a water tank
Underwater inspection17 min read

Underwater Water Tank Inspection: Visual + UT Workflow

A practical underwater tank inspection workflow using ROV video, local cleaning and UT spot readings, with clear coverage and hygiene controls.

Water tank inspectionUnderwater visual inspection
Illustration of weld seams, nozzles, and surface wear inside a steel pressure vessel
NDT Methods15 min read

Internal Pressure Vessel RVI and UT Gridding with MagRover

Plan internal pressure vessel inspection with MagRover RVI and UT gridding, including data quality, safety limits and underground-vessel considerations.

Pressure vessel inspectionRemote visual inspection
Illustration of welded storage-tank floor plates and visible staining beneath amber liquid
Tank Integrity9 min read

In-Service Tank Inspection and API 653: How Robotic UT Supports Integrity Decisions

How in-service robotic tank-floor data supports API 653 inspection planning, shutdown priorities and repair decisions while the tank remains operating.

API 653In-service inspection

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