NBBI Authorized Inspector (AI) study materials
NBBI Authorized Inspector (AI) study resources

NBBI Authorized Inspector (AI) study plan

NBBI Authorized Inspector (AI) · Give each week a clear focus.

8 weeks · About 8 hours per week

Week 1

ASME Boiler and Pressure Vessel Code - Construction Requirements (Sections I, IV, VIII)

  • Map the scope and jurisdictional boundaries of ASME Sections I, IV, and VIII Division 1, then assign the governing section for 20 short boiler and vessel descriptions.

  • Trace the Section I construction acceptance sequence for a new boiler, from material certification through PG-27 thickness, welded joint requirements, inspection hold points, PG-99 hydrostatic test, and stamping.

  • Calculate minimum required thickness for cylindrical shells and tubes using Section I PG-27 and Section VIII Division 1 UG-27 across five worked problems, tracking units and corrosion allowance carefully.

  • Distinguish Section IV heating boiler limits (15 psi steam; 160 psi and 250 degrees F water) from Section I power boiler scope, and state the consequence of exceeding each limit.

Your checkpoint

Two-page scope and formula card: a governing-code decision table plus five fully worked PG-27/UG-27 thickness problems, at least four of which are numerically correct.

Week 2

ASME Boiler and Pressure Vessel Code - Construction Requirements (Sections I, IV, VIII)

  • Apply UG-32 rules for ellipsoidal, torispherical, and flat heads, and size UW-16 fillet welds on a set of sketch-based problems.

  • Derive joint efficiency from UW-12 for each weld type and radiography extent, then recompute required thickness with the corrected efficiency.

  • Determine when postweld heat treatment is mandated using UCS-56 and Table UCS-56, and when impact testing is triggered or exempted under UCS-66 curves and UG-84.

  • Explain each Authorized Inspector hold point in Section I and Section VIII construction, including material verification, fit-up review, hydrostatic test witnessing, and data report signature.

Your checkpoint

Completed 30-item problem set on heads, joint efficiency, PWHT, and impact testing, self-graded to at least 85 percent, with every missed item reworked in writing and paragraph-cited.

Week 3

Materials, Welding and Nondestructive Examination

  • Match Section II specifications such as SA-516, SA-106, SA-105, and SA-240 to product form, service, and allowable stress values looked up in Section II Part D.

  • Review a sample WPS against Section IX QW-200 qualification variables, labeling each essential, supplementary essential, and nonessential variable and flagging any range that is unsupported by the PQR.

  • Compare Section V radiographic (Article 2), ultrasonic (Article 4), penetrant (Article 6), magnetic particle (Article 7), and visual (Article 9) methods by detectable flaw type and technique limits, then link each to the acceptance reference in UW-51 or UW-52.

  • Evaluate welder performance qualification records against QW-300, identifying which variable changes force requalification.

Your checkpoint

A WPS/PQR/welder-qualification review packet: one annotated sample WPS with every Section IX variable tagged plus a written accept or reject decision with paragraph citations.

Week 4

Materials, Welding and Nondestructive Examination & ASME Boiler and Pressure Vessel Code - Construction Requirements (Sections I, IV, VIII)

  • Quantify how spot radiography versus full radiography changes joint efficiency under UW-11, UW-51, and UW-52, and list the Inspector's verification steps when reviewing a radiography report.

  • Select NDE method and extent for vessels in lethal, hydrogen, and low-temperature service using UW-2, UW-11, and UCS-66.

  • Verify material test reports against Section II requirements for chemistry, tensile properties, impact energy, heat treatment condition, and marking traceability.

Your checkpoint

A timed 60-item practice exam covering Domains 1 and 3 in 90 minutes, scored, plus an error log that cites the governing code paragraph for every missed item.

Week 5

NBIC Inspection, Repairs and Alterations

  • Differentiate repair from alteration using NBIC Part 3 definitions, then classify 15 realistic job descriptions and justify each classification.

  • Sequence the full NBIC repair workflow: R-stamp holder qualification, repair and NDE plan, Inspector review and authorization, R-1 form completion, and stamping.

  • Determine when an alteration demands a new nameplate, a new or supplemental data report, and a code calculation or re-rating.

  • Describe the Inspector's authority and limits during in-service inspection under NBIC Part 2, including acceptance by inspection versus acceptance by calculation.

Your checkpoint

A repair-versus-alteration decision tree plus 15 solved scenarios, each with a one-line rationale and the specific NBIC paragraph referenced.

Week 6

NBIC Inspection, Repairs and Alterations & Pressure Relief Devices and Certification

  • Trace National Board registration and stamping requirements, distinguishing the R, VR, V, UV, and HV stamps and stating who is permitted to apply each.

  • Reconcile the roles of the Authorized Inspection Agency, the Inspector, and the Inspector Supervisor, and diagram the notification and record flow across a repair job.

  • Explain safety and relief valve selection rules for steam, air, and water service under Section I PG-67 through PG-73, Section VIII UG-125 through UG-137, and Section IV HG-400.

  • Determine set pressure, accumulation allowance, and required relieving capacity for eight scenarios, deriving each limit from the cited code section rather than from memory.

Your checkpoint

A relief device one-pager covering type selection, set pressure and accumulation rules by code section, and an Inspector witness checklist, plus eight solved capacity and set pressure problems.

Week 7

Pressure Relief Devices and Certification & Inspection Duties, Reports, Stamping and Administrative Requirements

  • Walk through pressure relief device testing and certification: pop test, seat tightness, capacity certification, nameplate data, and VR-stamp repair, listing each Inspector witness point.

  • Assemble the documentation an Inspector must complete for a new construction job, covering data report review, hold point sign-offs, stamping authorization, and code symbol application.

  • Describe Inspector independence and ethical obligations, and the correct route for resolving a nonconformance or a disputed code interpretation, including written inquiry and code case use.

  • Specify which inspection records and data reports must be retained, for how long, and who is entitled to receive copies.

Your checkpoint

A mock inspection dossier for one sample boiler containing a hold point log, a written nonconformance note, a data report checklist, and a stamping authorization, each cross-referenced to code paragraphs.

Week 8

Inspection Duties, Reports, Stamping and Administrative Requirements & NBIC Inspection, Repairs and Alterations

  • Convert five inspection findings into NBIC-style narrative report entries with code citations and unambiguous accept or reject dispositions.

  • Resolve 20 rapid administrative scenarios such as stamp misuse, lapsed qualifications, missing data reports, and jurisdictional variances, citing the controlling reference for each.

  • Re-audit the error logs from weeks 1 through 7 and rework the ten most frequent missed concepts until each can be explained without notes.

  • Sit a full-length timed mock exam under exam conditions, then break the result down by domain to set a final weak-area drill.

Your checkpoint

A scored 100-item timed mock exam with per-domain breakdown, followed by a 20-item weak-area re-drill completed at 85 percent or higher.

Milestones

Week 2: Explain, without notes, how joint efficiency, PWHT, and impact testing interact for one Division 1 vessel, and score at least 80 percent on the week 2 problem set.

Week 4: Score at least 75 percent on the 60-item Domains 1 and 3 exam, with an error log that cites a code paragraph for every missed item.

Week 6: Classify 15 repair and alteration scenarios correctly and state the set pressure and accumulation rule for five relief device cases with the code section cited each time.

Week 8: Achieve at least 80 percent overall on the 100-item mock exam and at least 70 percent in every domain, with no domain below 70 percent on the final re-drill.