Principle:

API 653 sets the standard for the inspection, repair, alteration, and reconstruction of aboveground storage tanks (ASTs). It applies to tanks built following API 650 and API 12C standards, ensuring their safety, integrity, and compliance with industry regulations. API 653 inspections help prevent leaks, environmental hazards, and structural failures in storage tanks used in oil & gas, petrochemical, power, and chemical industries.

• Scope:

  API 653 covers the inspection, repair, alteration, and reconstruction of steel, field-erected aboveground storage tanks (ASTs) built to API 650 or API 12C standards. 
• Purpose:

  The standard aims to ensure the safety and integrity of ASTs by providing guidelines for periodic inspections, repairs, and adjustments to prevent leaks, corrosion, and structural failures.

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