Oily-water tank operational reliability analysis in an oil and gas facility

The paper deals with one of the most general classifica-tions of atmospheric tanks according to their roof type in oil and gas plants. An overview of recommended time frames for inspection of storage tanks is given, depending on their structural characteristics. A detailed view of the storage tank with cone roof is shown, after it was taken out of service for examination purposes. An appropriate neces-sary random scheme is created for ultrasonic examinations of the tank bottom as its most critical element. Damages observed during the inspection are analysed in detail and remediation plans are prescribed in order to return the inspected tank to its correct condition for further uninter-rupted long-term continuous operation.