Getting Started: API 510 Pressure Vessel Inspector Certification
API's Inspector Certification Programs are based on industry-developed
standards that are recognized and used with confidence worldwide. These
standards have also provided a uniform platform that serves as a model for
many state and government regulations. These API programs emphasize
professional credibility and process integrity. They enable inspectors to
play an active role in improving industry health and safety; environmental
performance; ensuring compliance and self-regulation; and strengthening
management control and internal inspection capabilities.
Register for CASTI Training Programs
CASTI provides exam preparation training to help candidates pass the API 510 Pressure Vessel Inspector Certification Exam.
Our blended learning program includes detailed lessons on topics covered in the exam, practice exam questions, step-by-step solutions, and e-instructor support.
CASTI training programs are separate from the certification exams, which are administered by the American Petroleum Institute (API).
To take the API 510 examination, a candidate must meet at least one of the following criteria:
BS or higher in Engineering: must have a minimum of 1 year experience in supervision or performance of inspection activities as described in API 510
2-year degree or certificate in Engineering or Technology: must have a minimum of 2 years experience in design, construction, repair, operation, or inspection of pressure vessels, of which one year must be in supervision performance of inspection activities.
High school diploma or equivalent: must have a minimum of 3 years experience in design, construction, repair, operation, or inspection of pressure vessels, of which one year must be in supervision performance of inspection activities.
No formal education: must have a minimum of 5 or more years of experience in design, construction, repair, operation, or inspection of pressure vessels, of which one year must be in supervision performance of inspection activities.
API 510 Pressure Vessel Inspector Examination
The API 510 ICP examination is 6.5 hours long and consists of 150 multiple-choice questions divided into two parts:
the 2.75 hour closed-book part tests the candidate on knowledge and tasks requiring everyday working knowledge of API Standard 510 and other applicable reference documents.
the 3.75-hour open-book portion of the examination requires the use of more detailed information that the inspector is expected to be able to find in the documents, but would not normally be committed to memory.
For a complete list of specific Code editions, addenda, and supplements of reference publications that are effective for your exam date, please refer to the API 510 Effectivity Sheet.
every 3 years, re-applay
every 6 years, re-exam - online exam on latest edition of API 510
Exam Codes and CASTI Courses
All exam candidates will need the referenced Codes as they appear in the Effectivity sheet to study from and to complete the exam preparation course. These code documents can be purchased from CASTI.
For more information about CASTI's API 510 Exam Preparation courses, please visit:
Earning an API 510 certification qualifies inspectors to earn an In-Service Pressure Equipment Inspector (ISI) Certificate of Competency. For more information about CASTI's exam preparation training for ISI, please visit:
This summary of educational requirements, examination and renewal, and
recognition and reciprocity information is provided for your general
overview. It is important that you read the complete documents containing these details as provided by API, ASME, CSA, AWS and CASTI.