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API inspector guides & exam study guides
How the API 510, 570 and 653 certifications work, what's on each exam and how to plan your study, written for inspectors.
Certification guides
Guide
API 510 exam guide (2026-2027)
The API 510 Pressure Vessel Inspector exam is a 7.5-hour, 170-question computer-based test at Prometric test centers.
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Guide
How to become an API certified inspector (510, 570 or 653)
API 510 (pressure vessels), API 570 (piping) and API 653 (aboveground storage tanks) are the main inspector certifications in refining and petrochemicals.
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Exam study guides
API Inspector Certification
API 510 study guide
7 topics, key facts with sources, flashcards and a mind map. Premium: 800 flashcards and 60 key notes by topic.
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API Inspector Certification
API 570 study guide
7 topics, key facts with sources, flashcards and a mind map. Premium: 800 flashcards and 60 key notes by topic.
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API Inspector Certification
API 653 study guide
7 topics, key facts with sources, flashcards and a mind map. Premium: 800 flashcards and 60 key notes by topic.
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