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To ensure Self Bunded Tanks function effectively, maintain their integrity, and guarantee long - term safety, several maintenance procedures are essential.
Visual Inspections
Regular visual inspections form the cornerstone of maintenance. Examine the outer and inner walls for signs of corrosion, dents, cracks, or any physical damage. Check the seals around inlets, outlets, and the connection points between the inner and outer tanks. Look for any signs of leakage, such as wet spots, stains, or the presence of liquid in the interstitial space. Early detection of such issues allows for timely repair, preventing further deterioration.
Leak Detection Checks
In addition to visual inspections, perform leak detection tests periodically. Some tanks are equipped with built - in sensors to detect leaks in the interstitial space. However, manual testing using appropriate leak - detection solutions can provide an extra layer of assurance. These tests help identify even minor leaks that might otherwise go unnoticed, preventing environmental contamination and potential safety hazards.
Pressure and Ventilation System Maintenance
Inspect pressure relief valves to ensure they function correctly. Test the valves by simulating pressure build - up to verify that they open and close at the specified pressure levels. Clean and maintain ventilation systems regularly to prevent blockages. Clogged vents can lead to over - pressurization, which poses risks to the tank's integrity and safety.
Corrosion Prevention
Since Self Bunded Tanks are often made of steel, corrosion prevention is crucial. Apply protective coatings as recommended by the manufacturer. These coatings act as a barrier, preventing moisture and chemicals from coming into contact with the metal surface. Regularly check the condition of the coatings and touch up any areas where they are damaged.
Documentation and Record - keeping
Maintain detailed records of all maintenance activities, including inspection dates, findings, repairs, and replacements. This documentation is not only useful for tracking the tank's maintenance history but also for compliance with regulatory requirements.