API 510 Recertification: Step-by-Step Guide (2025)

If your API 510 certification is coming up for renewal, you’re not alone in feeling uncertain about the process. API 510 recertification has specific requirements for CPD hours, inspection experience, and documentation – and missing any piece of the puzzle can delay your renewal. This guide walks you through every step so you know exactly what to expect and how to prepare.

What Is API 510 Recertification?

API 510 is the Pressure Vessel Inspector certification issued by the American Petroleum Institute’s Individual Certification Program (ICP). It covers the inspection of pressure vessels, towers, drums, and heat exchangers in petroleum refineries and chemical plants.

Certification doesn’t last forever. API 510 is valid for a three-year cycle, and at the end of each cycle you must apply for recertification to keep your credential active. Miss the deadline or fail to meet the requirements, and your certification lapses – which means you’d need to retest to get it back.

The good news: if you stay on top of your CPD hours and inspection hours throughout the cycle, renewal is straightforward.

API 510 Recertification Requirements in 2025

To recertify your API 510 credential, you must meet all three of the following requirements during your active certification cycle:

1. CPD Hour Requirement

As of the 2025 cycle and beyond, API requires 24 continuing professional development (CPD) hours per three-year cycle, with a minimum of 8 CPD hours per calendar year.

Here’s how that breaks down:

Year 1: minimum 8 CPD hours
Year 2: minimum 8 CPD hours
Year 3: minimum 8 CPD hours
Total by cycle end: 24 CPD hours

You cannot frontload all 24 hours into the final year and expect to pass. The annual minimums must be met each year. Courses completed outside your active certification window do not count, and hours cannot carry over from a previous cycle.

Acceptable CPD activities include online courses, workshops, technical seminars, and formal training in topics related to pressure vessel inspection, damage mechanisms, NDT methods, ASME code, welding, risk-based inspection, and mechanical integrity. Crucially, any course used for CPD credit must include a final exam with a passing score – this is an API requirement, not optional.

2. Inspection Experience Requirement

API 510 requires that certified inspectors remain active in inspection-related work. Specifically, you must perform inspection-related work at least 20% of the time during your recertification period.

This means if you move into a purely administrative role or leave the industry for an extended period, your eligibility for recertification may be affected. Document your inspection activities throughout the cycle – don’t try to reconstruct this from memory at renewal time.

3. API ICP Web Quiz (Every Other Cycle)

Every six years (every other recertification cycle), API requires inspectors to complete a web-based quiz on the most recent code updates and revisions to the API 510 standard. This quiz is assigned by API ICP and tests your knowledge of changes made since your last major renewal. It does not count as CPD hours – it’s a separate requirement.

How to Document Your CPD Hours

Documentation is where many inspectors fall short – not because they didn’t do the training, but because they didn’t keep the paperwork. API ICP requires verifiable proof of each CPD activity. Acceptable documentation includes:

Certificate of completion (must show your name, provider, activity name, hours, and date)
Attendance log or sign-in sheet
Course syllabus or agenda
Screenshot confirmation for online or virtual training
Verification number (when provided)

Keep a dedicated folder – digital or physical – for every CPD document you collect. When renewal time comes, you’ll submit these records through the API ICP portal. Audits happen, so having clean documentation matters.

For a deeper dive on documentation, see our guide: How to Document CPD Hours for API Recertification.

What Happens If You Miss the Deadline?

If your API 510 certification expires before you complete recertification, you lose your certified status. At that point, you would need to retest – retaking the full API 510 examination, including the open-book portion – to regain your credential.

API does not offer a grace period for lapsed certifications. This is why it’s critical to track your CPD hours throughout the cycle, not just in the final months before expiration.

If you’re behind on hours, the fastest path forward is an online CPD course. Self-paced online courses can deliver 4-8 CPD hours each and can be completed on your schedule – evenings, weekends, or during downtime.

Step-by-Step Recertification Process

Here’s the full process from start to finish:

Track hours throughout your cycle. Don’t wait until year 3. Log each CPD activity as you complete it.
Meet the annual 8-hour minimum. Complete at least 8 CPD hours each calendar year of your cycle.
Complete 24 total hours by cycle end. Confirm you’ve hit the total requirement before applying.
Verify your inspection experience. Make sure you can document 20% inspection-related work throughout the period.
Complete the API web quiz if required. Check your cycle – if it’s your sixth year of certification, the quiz is mandatory.
Gather documentation. Compile all CPD certificates, completion records, and verification numbers.
Submit recertification application. Log in to the API ICP portal, complete the application, and upload documentation.
Pay the recertification fee. API charges a fee at renewal; check the current API ICP fee schedule.

Frequently Asked Questions About API 510 Recertification

Can I carry over CPD hours from my previous API 510 cycle?

No. CPD hours must be earned within your active certification cycle. Hours from a previous cycle do not transfer forward, and you cannot borrow hours from a future cycle. The 24 hours must be earned between your certification date and your renewal date.

Do online courses count for API 510 CPD hours?

Yes – online courses are an accepted format for CPD hours, provided the course covers an acceptable topic (inspection, damage mechanisms, NDT, welding, RBI, ASME codes, etc.) and includes a final exam with a passing score. Online courses are increasingly popular with inspectors because they’re self-paced and can be completed anywhere.

What happens if I only have 20 CPD hours when my cycle expires?

You would not meet the recertification requirement. API requires the full 24 hours before you can renew. If your cycle has already ended, your certification would lapse and you would need to retest. The best approach is to build hours consistently throughout the cycle so you’re never in a shortfall position.

Start Earning Your API 510 CPD Hours Today

Don’t wait until you’re behind. Integrity Inspector Academy offers online CPD courses built specifically for API 510 inspectors – covering pressure vessel inspection, damage mechanisms, NDT methods, and more. Each course includes a final exam and a certificate of completion that meets API documentation requirements.

Browse CPD courses for API 510 inspectors →