API 510 eligibility checker: do you qualify, and which test window fits

Try one free question

Choose your education, enter your pressure vessel experience from the last 10 years, and see whether you appear to meet the API 510 minimum today, or the date you will if you keep working. Then pick a test window and add its dates to your calendar.

Applies the education and experience table on API's API 510 page to what you enter, then lines the result up against the saved exam windows and application deadlines.

Your education and experience

Design, fabrication, repair, operation or inspection of pressure vessels counts toward the total. Count whole months.

Your result

API 510

Appears eligible from April 25, 2027

Experience required with your education
3 years
Your experience
2 years 6 months
Inspection experience required
1 year
Your inspection experience
1 year
Still needed
6 months

API decides eligibility, and verifies the experience you document on your application.

Next API 510 test windows

Test windowApply byYour datesCalendar
Jan 2 to January 22, 2027October 29, 2026Eligible April 25, 2027, after this deadline
May 7 to May 28, 2027March 4, 2027Eligible April 25, 2027, after this deadline
Sep 3 to September 24, 2027July 2, 2027Appears eligible by this deadline

Dates from API's schedule page as saved on October 21, 2026.

Studying for API 510? Take the free 10-question check to see exactly which topics to fix first, then close the gaps with the Long Seam course.

How the checker works

Each education choice maps to one minimum amount of experience. The checker subtracts your months from it. It also checks the inspection requirement: at every education level, 1 year of the experience must be supervising or performing inspection activities as described in API 510. Your wait is the longer of the two shortfalls. If you are still working in a role that adds both kinds of experience, the date is the day you counted to plus that wait in calendar months.

Minimum experience by education

EducationExperience required
Bachelor's or higher in engineering or technology, or 3+ years of military service in a technical role1 year
2-year associate's degree or certificate in engineering or technology, or 2 years of military service in a technical role2 years
High school diploma or equivalent3 years
No formal education5 years

The experience must be from the last 10 years, gained while employed by or under contract with an authorized inspection agency as API 510 defines it. Everything you claim must be documented on your application, and API verifies it after you submit.

Worked examples

  • High school diploma, 30 months of vessel experience of which 12 are inspection, counted to 24 October 2026, still working. The minimum is 36 months, so 6 more are needed: appears eligible from 24 April 2027. That is after the 4 March 2027 deadline for the May window, so the September 2027 window (apply by 2 July 2027) is the first one that fits.
  • Engineering bachelor's degree, 12 months of vessel experience of which 12 are inspection: appears eligible now.
  • Associate's degree, 30 months of experience but only 4 in inspection, still working: the total is met, but 8 more months of inspection work are needed, so the wait is 8 months.

These are original examples, not exam questions or API rulings.

Next steps: read the API 510 Body of Knowledge guide to see what the exam covers, and the effectivity sheet guide for the editions that apply to your window.

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Question 1 of the free 10-question check on API 510. No signup.

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IV. Practical knowledge - general

Which hydrotest situation carries the highest brittle fracture risk?

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Published references

Start with API 510

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