CASTI

New API 653 Effectivity Sheet and Body of Knowledge

API has released an updated Effectivity Sheet and an updated Body of Knowledge for the API 653 certification exam in March 2025.

Beware: Exam document editions have changed for the API 653 ICP certification exam in the March 2025 exam window. Make sure you know which exam document editions will be tested!

Have questions? CASTI has answers!

What is the Effectivity Sheet?

The API Effectivity Sheet lists all of the effective editions of the documents required for the API certification exam. Each exam window will have a specific Effectivity Sheet describing the editions of the documents required.

What is the Body of Knowledge?

The API Body of Knowledge provides a list of the specific topics included in the API certification exam. Each exam window will have a specific Body of Knowledge describing the various exam subject areas, including information that exam candidates are expected to know. Exam questions may be taken from anywhere within each publication listed in the Body of Knowledge, unless specifically excluded. In the event that specific sections of an exam publication are excluded–all other sections within that document are included. In some cases specific paragraphs or sections are referenced in the Body of Knowledge as an aid to the exam candidate.

Why are they important?

Because exam documents change from edition to edition, it is very important that you prepare for your exam using the correct editions of the documents. This will ensure that you are familiar with the publication and able to find answers quickly during the exam. Some exams cover many documents, often spanning over 1000 total pages. Time is limited during the exam so you must be able to quickly locate answers to the exam questions.

Where can I get them?

The Effectivity Sheet and Body of Knowledge can be found on the API website at www.api.org. Find the API webpage for the desired certification or click the links below.

When are they available?

The Effectivity Sheet and Body of Knowledge are always available on the API website. At times, there will be more than one Effectivity Sheet and Body of Knowledge listed on the API website. Be sure to review the Effectivity Sheet and Body of Knowledge that applies to the exam date that you intend to write.

Who are they for?

Anyone considering API certification should review the Effectivity Sheet and Body of Knowledge that corresponds to the date that you intend to write the certification exam.

Where can I get help with exam preparation?

CASTI offers exam preparation training to assist candidates who are planning to obtain API inspector certification. We can help you understand what documents you will require, exam study strategies, important areas to focus your exam study, and much more. Choose from live Instructor-Led training or online Self-Study options. For more information about CASTI training courses, visit these webpages: