API 653 Recertification: What You Need to Know

ByDuane Angell

The API 653 certification for Aboveground Storage Tank (AST) Inspectors comes with the same recertification clock as every API ICP credential – three years, with annual milestones you can’t skip. If you’re approaching your renewal window or want to plan ahead, here’s a clear breakdown of what API 653 recertification actually requires.

What Is API 653 Certification?

API 653 certifies inspectors on the inspection, repair, alteration, and reconstruction of aboveground petroleum storage tanks built to API 650 or similar standards. It’s the essential credential for AST inspectors working in refineries, terminals, and bulk liquid storage facilities. Your certification is valid for three years from the issue date.

API 653 Recertification: The Two Paths

Like all API ICP certifications, API 653 renewal comes down to a choice:

  • CPD Pathway: Complete required Continuing Professional Development hours while maintaining qualifying work experience
  • Re-examination Pathway: Retake and pass the full API 653 exam

Most credentialed inspectors renew via CPD. It’s lower cost, lower stress, and keeps you engaged with evolving standards throughout the cycle rather than cramming for one high-stakes exam.

CPD Requirements for API 653 Recertification

The Numbers

  • 24 CPD hours over the full 3-year cycle
  • 8 CPD hours minimum each year – this is annual, not cumulative
  • Hours must be from qualifying activities relevant to storage tank inspection

Qualifying Topic Areas for API 653 CPD

Your CPD hours need to relate to the knowledge domains covered by API 653. Relevant topics include:

  • Aboveground storage tank inspection standards (API 653, API 650)
  • Damage mechanisms specific to storage tanks – corrosion, settlement, coating failures
  • Nondestructive testing methods – floor scanning, UT, MFL, VT
  • Tank repair, alteration, and reconstruction procedures
  • Risk-Based Inspection (RBI) for storage tanks – API 580/581
  • Cathodic protection and corrosion control
  • Foundation and settlement assessment
  • Environmental and regulatory compliance (secondary containment, leak detection)
  • API 571 damage mechanisms – corrosion under insulation, pitting, MIC