Tanks don’t always get the attention they deserve until something goes wrong, such as leaks, contamination, and regulatory fines that can cost you a lot. It is important to regularly conduct inspections not just for compliance but to manage risks, as it is concerned with the environment.
API 653 is a standard for the inspection, repair, and reconstruction of aboveground storage tanks. It offers the requirements for maintaining tank integrity after they are in service. API 653 tank inspection is essential for tank management and the safe operation of the tank. Here, we’ll explore everything included in the API 653 tank inspection process.
What is API 653 Tank InspectionÂ
An API 653 tank inspection is an assessment of aboveground storage tanks used for petroleum and chemical products to ensure their structural integrity and safety. The American Petroleum Institute (API) Standard 653 provides minimum requirements for in-service tanks.
Conducting regular API-653 inspections is essential to save investments, ensure longevity and efficiency, and ensure your tanks remain operational for years.
Types of Inspections
The following are the types of API 653 tank inspection:
Routine Inspection: A general monthly inspection by the tank worker. It involves checking for issues such as leaks, tank foundation settlement, or any other visible changes.
External Inspection: It is performed by a certified API 653 inspector. It is a detailed visual and ultrasonic thickness evaluation every five years. It includes assessing the exterior of the tank and signs of cracks, corrosion, or damage to the vents or other systems. It doesn’t require the tank to be emptied; the tank can remain in service during this inspection.
Internal Inspection: It is the most detailed inspection type, and is required every 10 years, though the time can vary based on the tank’s condition and history. The tank must be emptied for a certified inspector to examine the interior. Modern technology can sometimes perform this inspection while the tank is still in service.
Bottom and Roof Inspection: Bottom inspection includes checking the tank’s floor for sediments settled down, corrosion, or other damage that could affect its stability. For roof inspection, according to API 653 standard, inspect the tank’s roof for signs of damage or deformation.
When You Should Schedule an Inspection
According to API 653, inspection should be done as follows:
- Tanks in service for 10 years should be inspected every 5 years.
- In-service tanks for more than 10 years should be inspected after 3 years.
- Tanks that are not in use should be properly serviced before use.Â
- Just-built tanks should be inspected thoroughly before being placed for use.
What the Inspection Team Will Look For
To ensure the proper functioning of the tank, an expert inspector will examine the tank and look for the following things:
- State of the tank bottom
- Condition of the roof
- Proof of leaks
- Situation of coatings or paints
- Condition of insulation systems
- Setting of accessories
- Marks of corrosion
- Signs of settlement
Advantages of API 653 Inspection
- Ensuring safety by identifying potential failures early, inspections help protect property and the environment from tank disaster risks.
- Following API 653 allows you to comply with state and federal regulations.
- Regular inspections ensure the longevity of aboveground storage tanks.
- Performing inspections for maintenance helps to avoid expensive repairs.