Exam Name: Pressure Vessel Inspector
Certification Provider: API
Corresponding Certification: Individual Certification Programs
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Updated: Sep 23, 2026
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API API-510 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Inspection Scope, Planning, and Data Evaluation | 28% | - Code scope, jurisdiction, and regulatory requirements - Remaining life and corrosion rate calculations - Inspection methods and technique selection - TML/CML selection and measurement planning - Inspection interval determination and extension rules - Records review and baseline data collection |
| Topic 2: Fitness-for-Service, RBI, and Pressure Testing | 12% | - Acceptance criteria and post-test evaluation - Risk-based inspection (RBI) principles and application - API 579/ASME FFS-1 screening and assessment - Hydrostatic, pneumatic, and leak testing rules |
| Topic 3: Damage Mechanisms and Corrosion Assessment | 22% | - High-temperature damage and material degradation - Corrosion under insulation (CUI) and environmental degradation - Cracking mechanisms (environmental, fatigue, creep) - Damage assessment and prioritization - Internal, external, and localized corrosion |
| Topic 4: Design, Materials, and Fabrication Rules | 22% | - Welding, qualification, and PWHT requirements - Positive material identification (PMI) and traceability - ASME Section VIII, V, IX application - MAWP, thickness, and joint efficiency calculations - Flanges, bolting, gaskets, and special components - Material selection, properties, and toughness requirements |
| Topic 5: Repairs, Alterations, Rerating, and Mechanical Integrity | 16% | - Rerating, reclassification, and nameplate updates - Authorization and responsibility for work - Repair vs alteration definitions and procedures - Pressure relieving devices and overpressure protection - Documentation and post-work verification |
API Pressure Vessel Inspector Sample Questions:
When must both an internal and external inspection always be performed?
- A. at installation of vessel
- B. whenever there is a change in fluid service
- C. whenever the vessel's ownership changes
- D. whenever the vessel's ownership and location changes
Correct Answer: D 🗳️
Describe how API-510 ensures that inspectors are qualified and maintain their qualifications over time.
Reveal Solution Discussion 0Correct Answer:
API-510 outlines specific qualifications for inspectors, including required experience, educational backgrounds, and the necessity of passing a certification exam. To maintain their certification, inspectors must undergo periodic re-certification, which includes continuing education and possibly re-examination to ensure they stay updated with the latest standards, technologies, and best practices. This continuous professional development helps maintain high standards of safety and compliance.
API-510 states that the minimum temperature for a pressure test should be how many degrees Fahrenheit above the minimum design metal temperature (MDMT)?
- A. 70°F
- B. 50°F
- C. 30°F
- D. 10°F
Correct Answer: C 🗳️
What is the standard interval for external inspections under API-510 for vessels in severe service conditions?
- A. 3 years
- B. 5 years
- C. 10 years
- D. 1 year
Correct Answer: D 🗳️
The function of an authorized inspection agency in accordance with API-510, is whose responsibility?
- A. Authorized engineering company
- B. Authorized inspection agency
- C. Authorized repair organization
- D. Owner-user
Correct Answer: D 🗳️
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