Storage tanks typically contain large volumes of valuable but potentially hazardous fluids. As such, inspection is a key element of the integrity management of storage tanks. The objective of the inspection is to provide information on the tank’s condition. This information should be such as to support effective integrity management decisions. Historically inspection of storage tanks has been reliant on man entry with the tank out of service. Opening storage tanks for internal inspection is a lengthy and difficult process.
Online Tank Cleaning and Inspection
SRUT is a screening technique. SRUT responds to corrosion that has suitably oriented facets to reflect energy back to the probe. Gradual thickness changes and isolated flaws are unlikely to be detected. In cases where corrosion is extensive, only the leading edge closest to the probe is likely to be detected. The method does not provide a quantitative direct measurement of wall thickness or the exact dimensions of defects/defected areas.
FranScan (AP) is a combination of SRUT GW (Short Range Guided Wave) and Phased Array for the inspection of annular plates and critical zone of storage tanks. Where with SRUT the annular plate can be screened up to 750-1000mm, with the A-ring application, detection and quantitative measurements can be given in the critical zone up to 100mm from the inner shell wall, with other phased array applications quantitative measurements can be obtained to 150-200mm.
Sonomatic have experience in cleaning all types of storage tanks and can treat sludge in several ways. With highly trained technicians, our cleaning methods meet and exceed the latest compliance and health and safety standards.
- The sludge can be locally disturbed to clear a space for the ultrasonic inspection.
- The sludge can be marshalled into a particular location in the tank.
- The sludge can be mixed in with the product higher up in the tank.
- The sludge can be pumped from the floor to the roof manway and then into temporary tankage for treatment.
- The sludge can be pumped from the floor to the roof manway and then into a neighbouring tank.