Tank storage


Online robotic tank bottom inspection

Due to local regulation issues, tanks usually need to be taken out of service for a fixed time period for inspection, without knowing in advance if this is actually necessary. Our OTIS Robotic Tank Bottom Inspection Series provides inspection according to the API 653 standards, which allows you to avoid this fixed time interval. The autonomous tank bottom inspection device uses UT sensors to detect any variation in thickness of the bottom plate while your tank remains in service.

API 653
The A.Hak Industrial Services’ InTank approach to tank inspection is a well-recognized and trusted method throughout the industry today. Tank owners can significantly reduce the costs of performing API 653 inspections by not having to remove their tanks from service, and by being able to plan out-of-service periods. The A.Hak Industrial Services’ InTank robotic system is efficient and cost-effective while it:
- eliminates the high cost of tank downtime.
- does away with the need for temporary storage.
- saves you the cost of cleaning.
- minimizes waste disposal costs.
- cuts inspection time to days instead of weeks.
- avoids disruptions in plant operations, keeping revenue constant.
- reduces environmental risks such as spills and VOC release.
- improves safety by eliminating confined space entry and personnel exposure to hazardous chemicals.

Our sophisticated robotic equipment ensures controlled and proven conditions for tank bottom inspections. Robotic equipment is not only safer than manual inspection, it is unaffected by working conditions. Its advanced, computer-based ultrasonic technique makes data collection more accurate.

Great accuracy
A.Hak Industrial Services’ patented acoustic navigation system – equipped with navigation pingers on the robot and navigation transducers on the tank shell – is used to pinpoint the robot’s location. Using onboard UT transducers, the robot follows a predetermined digital inspection grid and can collect millions ultrasonic scans of the tank bottom in order to perform computerized data analysis. When operating in clear fluids, we can equip the robot with HD cameras. The navigation allows us to reproduce our inspections in the future to determine corrosion rates with great accuracy. Our robots can maneuver in tanks containing sludge of up to 30 centimeters (12 inches) in depth. We can also equip our robot with cleaning systems using spray nozzles and brushes. This way it simultaneously cleans and inspects the tank bottom, enhancing safety and reducing costs. Cleaning times may vary depending on sludge levels.

Safe and cost-effective
Inspections involving a human presence increase safety and environmental risks, and traditional tank bottom inspection technologies require tanks to be offline during inspection. They must be drained, cleaned, degassed and ventilated – all of which incur significant costs for tank owners. By using the OTIS robots, the tank bottom inspection takes significantly less time, plus it is safer and more cost-effective.

Benefits of tank inspection robots:
- No downtime and no product waste
- API 653 recognized inspection
- Accurate inspection data allows to determine corrosion growth
- Non-man entry
- Cost-effective

A.Hak Industrial Services B.V.
Tank Services
Steenoven 2-6
4196 HG Tricht
P.O. Box 151
4190 CD Geldermalsen
The Netherlands
T +31 (0)345 579 211

A.Hak inTank
T +1 301 722 2299