- The AI Commission is issued through the National Board of Boiler and Pressure Vessel Inspectors, not a software or data-science body.
- The exam covers 12 content areas, running from inspector duties through record retention under ASME Sections I, IV and VIII.
- The issuer confirms 85 questions plus attendance at the AI Commission course with a passing examination.
- No percentage weights are published, so every one of the 12 domains deserves real study time.
What the Credential Actually Is
The National Board Authorized Inspector Commission, usually shortened to "AI," is a professional commission that qualifies a person to perform authorized inspection of boilers and pressure vessels during construction. It has nothing to do with artificial intelligence. If you landed here looking for machine-learning content, this is a different world entirely: pressure-retaining equipment, welding, materials, and the Code rules that keep steam and pressurized fluids from becoming catastrophic failures.
An Authorized Inspector is the independent third-party eye in the shop. When a manufacturer builds a power boiler, a heating boiler, or a pressure vessel to the ASME Boiler and Pressure Vessel Code, the Authorized Inspector verifies that design, materials, fabrication, examination and testing comply with Code requirements before the manufacturer's data report is signed and the Code symbol stamp is applied. The commission is the formal recognition that you are qualified to do that job.
If you want the shorter explainers on the terminology, see our pages on what AI is, what AI stands for, and the meaning of the term in this context.
Who Issues It and How the Exam Is Structured
The governing body is The National Board of Boiler and Pressure Vessel Inspectors. The credential is tied to the National Board's training and examination process rather than to a commercial testing vendor, so the content outline comes straight from the issuer. The detailed outline, document NB-331-NC Revision 6, lays out 12 numbered headings. The shorter introductory summary groups the material into 11 objectives, but that summary does not replace the detailed hierarchy. When you plan your study, work from the 12-heading outline.
Per the issuer's examination information, the examination consists of 85 questions, and candidates must attend the AI Commission course and achieve a passing examination. Several operational details are not confirmed here: the exact exam timer, the current fee, and the numerical pass mark. Verify those directly with the National Board before you budget or schedule. Our pages on certification cost, passing score, and exam dates track what is publicly known.
The Twelve Content Areas
No percentage weights are published for the domains. That means you cannot safely skip a domain on the assumption that it is lightly tested. The outline reads like the life cycle of a pressure vessel: who is responsible, what the equipment is, how the Code is organized, how quality is controlled, then design, materials, fabrication, examination, testing, calibration, paperwork, and records. For a deeper walk-through, see our complete guide to all 12 content areas.
Domain 1: Responsibilities and Duties of the AI
The roles of authorized inspection agencies, supervisors and inspectors as defined in RCI-1 and ASME QAI-1, plus duties that appear throughout the required references.
- Know who is responsible for what: manufacturer, inspection agency, supervisor, inspector.
- Expect duties to surface inside questions about other domains, not only in this one.
Domain 2: Boiler and Pressure Vessel Types and Terminology
Identifying boiler and vessel types and their parts.
- Terminology is the vocabulary every later domain assumes.
- Be able to recognize components from description, not just from a definition.
Domain 3: Code Structure and Content
Navigating the ASME BPVC structure and related requirements.
- Knowing where to look is half the battle in a code-based exam.
- Practice tracing a requirement from a scenario to the right Section and paragraph family.
Domain 4: Quality Control System
Quality control requirements found in Section I Appendix A-301, Section IV Appendix F, and Section VIII Division 1 Appendix 10.
- Learn how the three construction types treat the quality system differently.
Domain 5: Design
The largest technical cluster: power and heating boilers, external piping and vessels. Topics include shells and drums, piping, headers and nozzles, formed and flat heads, braced and stayed surfaces, weld sizes, nozzle reinforcement, preformed and prefabricated pressure parts, flanges, joint efficiencies and ligament efficiency.
- Expect calculation-flavored and rule-application questions here.
- Joint efficiency and ligament efficiency are distinct concepts; do not blur them.
Domain 6: Materials
Construction-section rules, product-form tolerances, markings and methods, pressure versus nonpressure parts, non-ASME standards, repair of defective material, and certifications.
- Understand what makes a material acceptable and how that acceptance is documented.
Domain 7: Fabrication
Cutting and edge preparation, cold-forming limits, out-of-roundness limits for cylindrical, conical and spherical shells, formed-head tolerances, lug and fitting attachment, and holes for screwed or threaded stays and tubes. Welding covers responsibilities and processes, procedure and welder or operator qualification, surface cleaning, alignment tolerances, spin holes, finished joints, fillet welds, defect repair, peening, and surface weld-metal buildup.
- This is the broadest domain on the outline, and the welding material is dense.
Domain 8: Nondestructive Examination
When NDE is required, permitted methods, the advantages and limitations of each method, procedure and personnel qualification, and reports.
Domain 9: Testing and Heat Treatment
Impact testing, heat treatment and pressure tests, including exemptions and alternatives.
- The exemptions and alternatives are where careless readers lose points.
Domain 10: Calibration of Measurement and Test Equipment (M&TE)
Calibration frequencies, methods, tolerances, master standards, identification and records for working and master measurement and test equipment.
Domain 11: Data Reports and Stamping
Data reports and stamping requirements for each construction type.
Domain 12: Record Retention
Record retention requirements under ASME Sections I, IV and VIII.
- Short in the outline, but the retention rules differ by Section, so memorize them side by side.
The Required Reference Library
This is an exam anchored to published documents. The required references are:
- ASME Section I (power boilers)
- ASME Section IV (heating boilers)
- ASME Section V (nondestructive examination)
- ASME Section VIII Division 1 (pressure vessels)
- ASME Section IX (welding, brazing and fusing qualifications)
- ASME B31.1 (power piping)
- ASME QAI-1 (qualifications for authorized inspection)
- RCI-1 / NB-263 (rules for commissioned inspectors)
Notice how the references map to the domains. Section V underpins Domain 8, Section IX underpins the welding qualification content in Domain 7, and QAI-1 and RCI-1 underpin Domain 1. B31.1 matters because external piping for power boilers falls within the design discussion. A candidate who understands that mapping can study a reference once and harvest points in several domains.
| Reference | Primary domains it feeds |
|---|---|
| ASME Section I | Quality control, design, materials, fabrication, data reports, record retention |
| ASME Section IV | Quality control, design, materials, fabrication, data reports, record retention |
| ASME Section V | Nondestructive examination |
| ASME Section VIII Division 1 | Quality control, design, materials, fabrication, testing, data reports, record retention |
| ASME Section IX | Fabrication (welding procedure and personnel qualification) |
| ASME B31.1 | Design (external piping), code structure |
| QAI-1 and RCI-1/NB-263 | Responsibilities and duties |
What the Questions Demand of You
With 85 questions spread across 12 areas and a reference-heavy outline, the exam rewards two skills: knowing the rules and knowing how to apply them to a situation an inspector would actually meet in a shop. Expect scenario framing: a weld joint, a nozzle opening, a heat-treatment exemption, a calibration lapse, a data report with a missing entry. The right answer is usually the one that matches the Code rule and the inspector's defined responsibility, not the one that sounds most conservative or most convenient.
Our difficulty guide discusses where candidates tend to struggle, and the pass rate page explains what is and is not publicly known about outcomes. Because the numerical pass mark is not verified here, avoid planning around a specific cut score; plan around mastery of the outline.
Who Hires Commissioned Inspectors
Authorized Inspectors work for authorized inspection agencies, which are the organizations that provide the third-party inspection service Code stamp holders must have. Many are employed by insurance companies or inspection firms that hold that authorization. Their clients are the manufacturers and fabricators of boilers and pressure vessels: shops building power boilers, heating boilers, and Section VIII vessels for refining, chemical processing, power generation, and general industry.
That structure explains why the commission is career-defining in this niche. The role is a regulatory gatekeeping function, and the work is tied to the shop floor and the paperwork that closes out a job. For compensation context, see our salary analysis, and for the bigger career picture, our ROI analysis and jobs overview. Eligibility prerequisites are covered in our requirements guide.
Key Takeaway
The commission is not a general credential you add to a resume for flexibility. It qualifies you for a specific independent-inspection role, so the right question is whether you want to work in inspection of boilers and pressure vessels, and whether an authorized inspection agency will sponsor that path.
Sequencing Your Preparation by Domain
Study methodology matters less here than study order, because the domains build on each other. A sensible arc follows the vessel's life cycle and front-loads the vocabulary and the Code map. The detailed method advice lives in our study guide; the schedule below only shows which domain goes where and why.
Foundations: Domains 1, 2 and 3
- Learn the roles in QAI-1 and RCI-1/NB-263 so you can filter every later question through "what is the inspector's responsibility."
- Master terminology and the layout of Sections I, IV and VIII Division 1 before you attempt calculations.
Technical core: Domains 4, 5 and 6
- Work the quality control appendices, then spend the most time on design: nozzle reinforcement, joint and ligament efficiency, stayed surfaces.
- Pair materials study with design so you see why a material rule exists.
Shop floor: Domains 7, 8 and 9
- Fabrication and welding are broad; split welding qualification (Section IX) from forming tolerances.
- Learn NDE method limitations alongside Section V, then drill testing and heat-treatment exemptions.
Closeout: Domains 10, 11 and 12, then review
- Build side-by-side tables for data reports and record retention across Sections I, IV and VIII.
- Finish with mixed practice sets across all 12 areas; the practice test site is built for exactly that kind of cross-domain drilling.
Because weights are not published, spend your final review time on whichever domains your practice results show to be weakest rather than on the ones you enjoy. A one-page recap helps in the last days; our cheat sheet is a good model for what to condense. You can also try targeted questions at our main practice test to find gaps early.
Not the Other "AI"
The acronym is crowded. Several unrelated credentials and fields share it, and their details do not transfer. The National Board Authorized Inspector Commission has its own issuer, its own exam, and its own body of knowledge built on ASME Code. If you are comparing sources, check that any fee, date, or pass figure you find actually belongs to this commission. For more on the terminology question, see what AI means, what an AI is, and our dedicated pages on the certification, what AI certification is, and training.
Frequently Asked Questions
It qualifies you to perform authorized inspection of boilers and pressure vessels during construction, verifying compliance with the ASME Boiler and Pressure Vessel Code before data reports are signed and Code stamping is applied.
The National Board of Boiler and Pressure Vessel Inspectors governs it. The issuer's examination information confirms an 85-question examination and attendance at the AI Commission course with a passing examination.
The detailed outline, NB-331-NC Revision 6, has 12 numbered headings, from inspector responsibilities through record retention. The shorter 11-objective summary groups content differently but does not replace the detailed outline.
No. No percentage weights are published, so you should prepare across all 12 areas rather than betting on a subset.
The required references are ASME Sections I, IV, V, VIII Division 1 and IX, B31.1, QAI-1, and RCI-1/NB-263. Each maps to specific domains, so studying them against the outline is the most efficient approach.
Those details are unverified here. Confirm the current timer, fee, and numerical pass mark directly with the National Board before registering or budgeting.