Drone Inspection of Structures, Tanks and Utilities with Qualified Reporting

Drone inspection removes the two most expensive parts of inspecting a tall or enclosed asset: getting a person to it, and shutting it down first. itmad provides aerial inspection of utilities, structures, tanks, flare stacks and confined spaces, with the findings interpreted and reported by qualified inspection personnel. Scaffolding, rope access and confined space entry all carry cost, time and risk that aerial capture avoids, and much of the work can be done while the asset stays in service. itmad operates across the Middle East, Asia and Europe. Last reviewed: October 2026.

How the service works

Typical drone mobilisation takes one to two days, while scaffolding on a flare stack or cooling tower takes two to four weeks. Aerial capture is carried out by approved operators, and drone operation is regulated nationally: operator approval and site-specific permissions differ from country to country and are stricter near airports, over critical infrastructure and in controlled zones. itmad confirms permissions before mobilisation, and where a site cannot be flown, itmad advises at enquiry stage and does not mobilise and find out on arrival.

itmad provides what happens on either side of the flight: defining what needs to be captured, and at what resolution, to answer the inspection question, and then interpreting the imagery and reporting against the applicable acceptance criteria. A drone produces images and not an inspection, and the difference between a photo set and a report that a client can act on is the qualified inspector who reads it.

Applications

For utilities, overhead power lines, pylons, transmission towers and substations are surveyed for damage, corrosion, displaced components and encroachment, along routes that would be impractical to cover on foot, without an outage or working-at-height exposure. Cell towers, cooling towers, chimneys, flare stacks and other elevated structures are examined for cracking, corrosion, coating breakdown, missing fixings and damage, at elevations and angles that would otherwise need scaffold or rope access. On storage tanks, drones record external shell and roof condition, coating breakdown and seam condition without erecting access equipment.

Tanks, vessels and voids can be surveyed internally by drone and not by entry, which removes the permit, the standby team, the rescue plan and the confined space exposure entirely. Infrared capture identifies heat loss, insulation failure, leaks and thermal anomalies across large surface areas much faster than a ground survey, and the same approach serves solar farms, with panel-level thermal and visual inspection, and wind installations, with blade and tower inspection. Orthomosaic maps, topographic survey, point clouds and digital surface, terrain and elevation models support planning and volume measurement, and repeat surveys flown to the same flight plan make change between inspections measurable and not impressionistic, which is where the value of a drone programme compounds.

What drone inspection will and will not tell you

Drone inspection is a visual and thermal method. It finds surface condition, damage, displacement and thermal anomaly across areas that are impractical to cover on foot. It does not measure wall thickness, detect subsurface flaws or replace contact NDT, and where a survey identifies an area of concern, close-up examination by ultrasonic or another contact method is normally the next step.

Used correctly, it is a screening tool that directs expensive access to where it is actually needed, and itmad says which findings can be concluded from aerial data and which need follow-up contact inspection. For visual and thermal condition assessment of external surfaces it can remove the need for scaffolding or rope access altogether, at lower cost, with faster mobilisation and no working-at-height risk.

Deliverables

An inspection report that interprets the captured data against applicable acceptance criteria, with high-resolution still imagery indexed to location on the asset, and infrared and thermal imagery where a thermal survey was flown. The client also receives high-definition video of the survey, point cloud data where 3D capture was carried out, and orthomosaic, DSM, DTM or DEM files where modelling was in scope. Findings are recorded with location, severity and recommended follow-up, with comparison against previous surveys where a baseline exists.

Inspection personnel

Interpretation and reporting are carried out by itmad inspection personnel qualified in the relevant discipline: ASNT and PCN qualified NDT personnel for structural and coating findings, and API-certified inspectors for pressure equipment and storage tank assessments where the acceptance criteria require it.

Frequently asked questions

What can be inspected by drone?

Power utilities such as overhead lines, pylons and substations, oil and gas assets such as flare stacks, tanks and offshore structures, bridges, towers, chimneys and facades, solar farms, wind installations, and confined spaces such as tanks and vessels surveyed internally without entry. Each survey is planned around the inspection question to be answered.

What is the difference between a drone survey and a drone inspection?

A drone survey is the aerial data capture: imagery, thermal data or point cloud. A drone inspection is the interpretation of that data against acceptance criteria by a qualified inspector, resulting in a report that a client can act on, and itmad provides both.

Can drone inspection replace rope access or scaffolding?

For visual and thermal assessment of external surfaces it can, with lower cost, faster mobilisation and no working-at-height risk. It does not measure wall thickness or detect subsurface defects, so contact NDT or rope access is the normal follow-up for any area of concern.

Are drone flights always possible?

No. Drone operation is regulated nationally, and operator approval and site permissions differ from country to country and are stricter near airports, critical infrastructure and controlled zones. itmad confirms permissions before mobilisation and advises at enquiry stage if a site cannot be flown.

What does a drone inspection deliver?

A report interpreting the findings against acceptance criteria, imagery indexed to location, thermal imagery where flown, video, point cloud data and orthomosaic or elevation models where in scope. Findings record location, severity and recommended follow-up.

Who interprets the drone data?

itmad inspection personnel qualified in the relevant discipline: ASNT and PCN qualified NDT personnel for structural and coating findings, and API-certified inspectors for pressure equipment and tank assessments where the criteria require it. A drone produces images, and the qualified inspector turns them into findings.