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Updated: Aug 23, 2026
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API API-510 Exam Overview:
| Certification Vendor: | American Petroleum Institute (API) |
| Exam Name: | API 510 Pressure Vessel Inspector Certification Exam |
| Exam Number: | API-510 |
| Related Certifications: | API 570 Piping Inspector API 653 Storage Tank Inspector API 571 Damage Mechanisms API 576 Pressure Relieving Devices |
| Available Languages: | English |
| Passing Score: | 550 (scaled score, range 200–750) |
| Real Exam Qty: | 170 (140 scored + 30 unscored pretest; 110 closed-book + 60 open-book) |
| Exam Duration: | 450 (total exam day: 7.5 hours; 165 min closed-book + 225 min open-book + 45 min break) |
| Exam Format: | Computer-based test, Multiple-choice questions, Two-part: closed-book (no references) + open-book (on-screen code access only) |
| Exam Price: | $875 (API member) / $1,125 (non-member) USD |
| Certificate Validity Period: | 3 years |
| Recommended Training: | API Official Training Resources API 510 Body of Knowledge |
| Exam Registration: | Prometric Scheduling API Certification Portal |
| Sample Questions: | API API-510 Sample Questions |
| Exam Way: | In-person computer-based test at Prometric authorized centers worldwide; no remote testing available |
| Pre Condition: | Education + experience: BS/Eng Tech: 1 year; 2-yr degree: 2 years; High school: 3 years; No degree: 5 years. All require minimum 1 year performing/supervising pressure vessel inspection work within last 10 years |
| Official Syllabus URL: | https://www.api.org/certification/icp/programs/510 |
API API-510 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Fitness-for-Service, RBI, and Pressure Testing | 12% | - Risk-based inspection (RBI) principles and application - Hydrostatic, pneumatic, and leak testing rules - Acceptance criteria and post-test evaluation - API 579/ASME FFS-1 screening and assessment |
| Topic 2: Repairs, Alterations, Rerating, and Mechanical Integrity | 16% | - Pressure relieving devices and overpressure protection - Repair vs alteration definitions and procedures - Documentation and post-work verification - Authorization and responsibility for work - Rerating, reclassification, and nameplate updates |
| Topic 3: Inspection Scope, Planning, and Data Evaluation | 28% | - Code scope, jurisdiction, and regulatory requirements - Inspection methods and technique selection - Inspection interval determination and extension rules - Records review and baseline data collection - TML/CML selection and measurement planning - Remaining life and corrosion rate calculations |
| Topic 4: Design, Materials, and Fabrication Rules | 22% | - MAWP, thickness, and joint efficiency calculations - Positive material identification (PMI) and traceability - ASME Section VIII, V, IX application - Flanges, bolting, gaskets, and special components - Material selection, properties, and toughness requirements - Welding, qualification, and PWHT requirements |
| Topic 5: Damage Mechanisms and Corrosion Assessment | 22% | - High-temperature damage and material degradation - Cracking mechanisms (environmental, fatigue, creep) - Damage assessment and prioritization - Internal, external, and localized corrosion - Corrosion under insulation (CUI) and environmental degradation |
API Pressure Vessel Inspector Sample Questions:
1. When the half bead or temper bead technique of repair is proposed, the first consideration that must be given should be;
A) A metallurgical review conducted by an engineer shall be performed to assure the proposed alternative is suitable for the application
B) Consultation with the jurisdictional requirements
C) Time required to do the repair, and personnel safety
D) Close monitoring of the welding operation
2. Explain the API-510 provisions regarding the frequency and extent of inspections required after a pressure vessel has been altered or repaired.
3. Discuss the strategies for implementing API-510 standards in a multinational corporation with diverse operational environments.
4. Explain the role of digital documentation in maintaining API-510 compliance for pressure vessels.
5. According to API-510, what is the required frequency for checking the calibration of pressure testing equipment?
A) Every two years
B) Annually
C) Before each use
D) Every five years
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: Only visible for members | Question # 3 Answer: Only visible for members | Question # 4 Answer: Only visible for members | Question # 5 Answer: B |
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