Industrial Chimney Inspection by Drone
Inspect factory chimneys, power plant stacks and industrial flues by drone: cracks, corrosion and lining condition — without scaffolding or production shutdown.
Industrial chimneys — in reinforced concrete, masonry or steel — are among the most difficult structures to inspect conventionally. Their height (from 20 to over 200 metres), restricted access and site operational constraints make conventional inspection a lengthy, costly and potentially hazardous operation. The drone resolves these constraints: in a matter of hours, the entire shaft is documented in high resolution, without scaffolding and without interrupting production.
Why inspect industrial chimneys regularly?
A chimney in poor condition presents several risks: partial or total collapse, falling elements (concrete, bricks, lining material), contamination of surrounding equipment by material fragments. For sites subject to regulatory inspections (ICPE, Seveso sites), chimney condition is a regular focus of classified installation inspectors.
The most common defects are:
- Longitudinal and transverse cracks in concrete or masonry
- Concrete carbonation with depassivation of reinforcement
- Corrosion of hoops and exposed reinforcement bars
- Internal lining degradation (refractory bricks, epoxy resin) on acid chimneys
- Condition of expansion joints and steel banding
- Shell corrosion on steel chimneys, particularly at the condensation zone
The drone advantage
Complete external inspection without scaffolding
External inspection of a chimney by drone is carried out in 1 to 3 hours depending on height and the number of nozzles and elements to document. The drone makes several circular passes at different altitudes, with vertical and horizontal shots covering the entire shaft.
The absence of scaffolding represents a substantial saving — on a 60-metre chimney, scaffolding typically costs more than the inspection itself — and eliminates assembly and dismantling delays.
Continuous operation inspection
On continuously operating industrial sites, a production shutdown for inspection is a major operational cost. The drone inspects the exterior of the chimney without shutdown or disruption to operations, provided safety conditions permit (wind, temperature of flue gases at chimney exit).
High-resolution photographic documentation
The delivered images allow crack opening measurements, identification of carbonation zones by concrete colour and tracking of degradation progression between inspection campaigns. This documentary traceability is valuable for technical assessments and regulatory files.
Inspection protocol and report
A chimney inspection by drone comprises:
- Preliminary survey — plan review, site constraint identification, weather condition verification (wind, thermal stability around the shaft)
- Inspection flight — circular passes at different altitudes, close-up views of sensitive zones
- Image processing — panoramic shaft development (cylindrical unwrap), anomaly annotation
- Structured report — defect classification by zone and severity, intervention recommendations
The report is delivered in a format usable by engineering offices and site maintenance departments.
Our field approach
The DJI Matrice 4TD and its 168 mm optical zoom deliver high-resolution imagery from a safe standoff distance suited to the thermal and wind conditions around operating chimneys. Our pilots are trained in flight protocols specific to industrial environments and coordination procedures with site HSE teams.