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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.

Inspection data quality16 min read|Sep 4, 2026

UT Corrosion-Rate Trending in United States

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.

  • Qualify location, physical configuration, measurement validity and coverage before calculating a UT corrosion trend.
  • Define each location from a stable datum, local coordinates, direction, units, drawing revision and bounded examination area.
  • Compare like with like: a spot value, scan minimum and area statistic describe different evidence unless a qualified procedure reconciles them.
Illustration of repeatable ultrasonic thickness locations referenced from a fixed weld datum on industrial piping
Illustration of localized corrosion where a process pipe rests on a steel support
Pipeline inspection16 min read

Pipe Support Corrosion Inspection: United States

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: United States

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 in United States | 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 Tank Inspection: United States | ROV + UT

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 Inspection in United States | RVI and UT

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

API 653 Robotic Tank Inspection in United States | In-Service UT Guide

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
Illustration comparing a closed operating storage tank with an adjacent tank opened for internal inspection
Inspection Economics8 min read

Robotic vs Manual Tank Inspection Cost in United States | Full Project Guide

A practical cost model for comparing robotic tank inspection with manual internal inspection, including shutdown, cleaning, gas-freeing, scaffolding, confined-space controls and lost availability.

Tank inspection costShutdown reduction
Illustration of varied coating, corrosion, and deposit conditions across a storage-tank floor
NDT Methods10 min read

Tank Floor Inspection Methods in United States | MFL, Manual UT and Robotic UT

A technical comparison of MFL floor scanning, manual ultrasonic testing and robotic in-service UT crawlers for storage tank bottom integrity programs.

MFLUT
Illustration of an open process-vessel manway revealing constrained internal geometry and surface wear
HSE & Access8 min read

Confined Space Inspection Alternative in United States | Robotic NDT

How robotic NDT can remove people from tanks, pressure vessels, boilers and water assets while reducing permit burden, rescue exposure and shutdown dependency.

Confined spaceHSE

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