The Basic Components of API 653

Large Fuel Tanks

It’s important to conduct proper maintenance to ensure that everything is in good working condition. API 653 is the standard inspection protocol for tanks above 50 feet or containers that have a diameter greater than 30 feet. A standard API 653 inspection service is trained to ensure that a tank is safe and reliable.

General Tank Information

Trained inspectors often check the tank description, including its specifications, construction, and spill control. The primary inspection requirements cover steel storage tanks produced under the API 650 standards and the API 12C. Once the inspector finds any conflict between the criteria mentioned above, then the API 653 takes precedence.

Aboveground Tank Components

Inspectors also check the tank bottom, tank shell, and the tank roof as well. Various types of inspection are also included with aboveground tank components, such as magnetic particles, tracer gas, and magnetic flux scans.


Another component included in the inspection is the structure of the tank. The minimum thickness and the maximum corrosion rate will also be taken into consideration.

Ground Settlement Evaluation

Lastly, the inspector will check the settling of the tank. They will examine whether the container is settling correctly in the ground or if there are any signs of titling. If the tank is found to be out of the plane, then it may cause a problem in the future.

These are the essential components of the API 653 inspection. It’s highly recommended to perform a monthly review to assess the condition of the tank carefully. This way, you can avoid an accident in the future. It’s always best to work with a certified inspector to guarantee its performance.