Terra UT Drone - Ultrasonic Thickness Measurements with drone

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For a safer workplace and a lower downtime

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April 11 2024

Terra Inspectioneering executes ultrasonic thickness (UT) measurements using drones. With the Terra UT drone it is possible to execute certified steel thickness measurements at hard to reach places at height, such as storage tank walls, roofs and rafters or boiler tubes.

The UT drone is Terra's proprietary development and is based on patented technology that enables the drone to firmly and precisely clean the spot to be measured and press the UT probe against the surface. The drone has been specially developed for indoor use in industrial confined spaces and can be controlled in the presence of steel and concrete.

Pros & Limitations

Reduced HSE risk by mitigating work at height and confined space entry

Eliminates scaffolding and rope access costs

Fast deployment, automatic UT data cloud storage

Reduced downtime of assets

Cleaning brush for optimal surface preparation

Detailed monitoring of UT A-Graph live on screen

Support for tank shell, roof, floor and rafters

If surface is too heavily corroded, UT measurements are not possible

Specification

Specification Title	Specification Description
Accuracy	Visual inspection: details until 0,1mm are distinguishable. UT measurements: 0,1 mm accuracy.
Areas of Application	Storage tanks (carbon steel, stainless steel, aluminium). All other steel equipment that need thickness measurements.
ATEX certified	The UT drone can be equipped with certified LEL meter for Atex zone 1 application.
Capabilities	Integrated couplant (gel) dispenser for optimal contact between UT probe and surface. Integrated surface cleaning brush. Calibrated UT measurement device with certified calibration report.
Certifications / licences	EEMUA159, API653, Level II NDT engineers, Calibration report of UT sensor available, VCA*, Terra UT Drone operator certificate.
Compliance	Inspection and reporting in oil and gas industry compliant with EEMUA159, API653, API510 codes or equivalent.
In-service inspection possible	Yes, from outside.
Output	Raw UT Data is stored in cloud for optimal traceability of data. Deliverable is certified UT report.
Redundancy	Redundant ground station, flight controller and battery.
Speed	Max. 300 UT measurements per day.