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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 Integrity10 min read|Oct 23, 2026

Fixed-Roof Tank Inspection in India | Plate UT

A plate UT reading cannot clear the vent curb or the seam beside it. Map the fixed roof by zone, qualify the data and give every gap a follow-up method.

  • A valid roof-plate reading describes its measured location only.
  • Seams, penetrations and the roof edge each need their own inspection question.
  • A displayed UT number with failed coupling or response is a rejected attempt.
Illustration of a fixed steel tank roof with plate seams, a vent and a hatch defining separate inspection zones
Illustration of a pressure-vessel nozzle with a reinforcing pad, welded neck and bolted pipe connection
Pressure vessel inspection10 min read

Pressure Vessel Nozzle Inspection in India | UT Scope

A valid shell UT reading beside a nozzle leaves the neck, weld and blocked quadrants unanswered. Map each feature, reject weak responses and assign the gaps to follow-up.

Pressure vessel nozzlesUT thickness
Illustration of a cooling tower cold-water basin with a baffle, outlet screen and visible sediment zones
Underwater inspection12 min read

Cooling Tower Basin Inspection in India | PetroBot

A clear patch beside the basin outlet says little about the floor behind a baffle. Map the deposits, valid measurements and gaps before deciding what needs cleaning or a drained look.

Cooling towersBasin inspection
Illustration of an insulated horizontal pressure vessel with weathered jacket seams, a nozzle penetration and two saddle supports
Pressure vessel inspection14 min read

Pressure Vessel CUI Inspection in India | PetroBot

A valid UT reading at one opening leaves the neighboring jacketed shell unexamined. Use the vessel's CUI history to choose openings, verify thickness results and hand off the gaps.

Pressure vesselsCorrosion under insulation
Illustration of an aboveground steel storage-tank shell with visible courses, seams, appurtenances and weathered coating
Tank Integrity16 min read

Storage Tank Shell UT Mapping in India | PetroBot

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.

Storage tank shellsUT mapping
Illustration of a process-piping elbow with visible weld boundaries and weathered coating for UT thickness-mapping planning
NDT Methods16 min read

Piping Elbow UT Mapping in India | Wall-Thinning Inspection

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 in India | Boiler-Tube UT

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 in India | PetroBot

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 in India: 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 in India

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

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