How to determine if a tank needs replacement?
Oct 27, 2025
1. Appearance and Structural Inspection
1. Corrosion and Deformation
Visually inspect the tank body, roof, and structural components. If significant corrosion, deformation, or cracking is observed, further evaluation is required.
Minor deformation of plastic tanks can be restored by heating, but severe deformation that affects serviceability requires replacement.
2. Sealing and Leakage
Inspect welds and joints for leaks and check for deterioration of sealing gaskets. Tank accessories such as breather valves and flame arresters should be cleaned and tested for seals regularly.
2. Internal Condition Inspection
1. Oil Quality and Residue
Use the dipstick method to inspect the clarity of the oil gauge. If it is blurred or contains a large amount of impurities (such as particles or colloids), it indicates severe tank contamination.
Use the pouring method to inspect the gloss of the oil flow. Turbidity or stratification may indicate the need for tank replacement.
2. Internal Facility Inspection
Perform hammer testing or ultrasonic thickness measurement on internal components such as heating coils and floating roofs. Replace any components that exhibit excessive corrosion. III. Functional Testing
1. Abnormal Filling and Oil Discharge
If filling and oil discharge problems persist after eliminating other component failures, the tank may be clogged or damaged.
2. Compliance with Safety Standards
Food contact tanks must comply with standards such as GB 4806.9-2016. If lead migration exceeds the standard (e.g., >0.05 mg/kg), they must be replaced.
IV. Regular Maintenance Recommendations
Metal tanks should be thoroughly inspected every 2-3 years. Plastic tanks are recommended to be evaluated every 5 years or as specified by the manufacturer.
