Ultrasonic Testing (UT) Requirements Under NBIC / R Stamp

Sensitivity setting is the auditable step: the reference block used must itself be in calibration and traceable, and its identity recorded on the report. NBIC / R Stamp, enforced by The National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue,.: Employer-based.

An auditor examining UT asks for instrument, probes, cables, couplant, and the calibration and reference blocks used to set sensitivity. NBIC has four parts — Installation, Inspection, Repairs and Alterations, and Pressure Relief Devices. Part 3 governs repairs and alterations regardless of the original code of construction, and provides alternative methods for examination, testing and heat treatment when the original code's requirements cannot be met. To perform code repairs a firm needs an R Certificate of Authorization: a quality management system meeting NBIC Part 3, Section 1.5; an inspection agreement in force with an Authorized Inspection Agency; and a successful on-site review. For an NDE provider, the practical requirement is that your written practice, method procedures, personnel certification records and calibration records must be available inside the certificate holder's system, because the certificate holder is responsible for all work including subcontracted work.

Source: National Board "R" Certificate of Authorization page, nationalboard.org, accessed 21 August 2026 — verified for the NB-12 application route, the AIA inspection agreement prerequisite, the on-site quality system review, the three-year term, the $1,150 USD certificate fee and the $150 one-time steel stamp loan charge. NB-415, Revision 8, Accreditation of Repair Organizations (nationalboard.org) — verified for the NB-12 and Business Center renewal route, the six-month renewal window, review team composition under NB-263 RCI-1, the demonstration by current work or mock-up, the Qualification Review Report, the three-year expiry, the NBIC Part 3 Section 1.5 QMS requirement, the two-year NBIC edition cycle with mandatory status six months after issue, the Shop/Temporary Location/Field Site definitions, registration of NB-66 (R-1) and NB-229 (R-2), and NBIC Part 3 Supplement 11 for engineered repairs and alterations. National Board "NBIC 2025 Edition Changes" page — verified for the four-part structure, the Quality System to Quality Management System rename, and the new Part 3 supplement on Engineered Repairs and Alterations. The National Board & ASME Guide for the NDE quality-system review questions and the treatment of subcontracted NDE.

Ultrasonic Testing under NBIC / R Stamp — procedure, personnel and evidence
Item	What applies	Why it matters
Regime	National Board Inspection Code, NB-23 (NBIC), and the National Board "R" Certificate of Authorization	Enforced by The National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus, Ohio; reviews conducted jointly with the National Board member jurisdiction and the applicant's Authorized Inspection Agency
Method	Ultrasonic Testing (UT)	Needs its own procedure and its own qualified personnel
Procedure approval	The employer's Level III, qualified in this method	The signature an auditor traces
Other methods in scope	RT, PT, MT, VT, ET	Each needs separate qualification
Renewal	The Certificate of Authorization expires three years after the date of issuance or renewal. Renewal must be applied for at least six months before expiry, submitted online through the Certificate Administrator account on the National Board Business Center, and a triennial review is conducted. NBIC editions are published every two years; an edition is permissive on its date of issue and becomes mandatory six months later, so an organization may be reviewed against an edition it has not yet been obliged to adopt. The National Board publishes the R certificate fee as $1,150 USD for the three-year term, with a one-time $150 steel stamp loan charge on new issuance; jurisdiction and AIA time for the review is billed separately.	Applies to the personnel certification behind this method

Does NBIC / R Stamp require a separate procedure for UT?

Yes. Every method in scope needs its own written procedure, approved by someone qualified in that method, describing technique, equipment, calibration, scanning or coverage, acceptance criteria and reporting. A single combined "NDT procedure" covering several methods is a finding under every regime that names procedures individually.

Who can approve a UT procedure under NBIC / R Stamp?

A Level III qualified in UT. Because NBIC / R Stamp accepts employer-based certification, that Level III may be contracted rather than employed — but their own qualification must cover UT, and an auditor will check that before accepting the signature.

What UT records does a NBIC / R Stamp audit sample?

The approved procedure, the technician's UT certification on the date of work, and the equipment evidence — instrument, probes, cables, couplant, and the calibration and reference blocks used to set sensitivity. The auditor works backwards from a finished job, so every item has to reconcile with the report and its stated acceptance criteria.

What is the most common UT finding at audit?

An in-calibration instrument used with an unidentified or out-of-calibration reference block. It is a records failure rather than a technique failure — the examination was performed correctly and the evidence supporting it cannot be produced, which under NBIC / R Stamp is recorded the same way as not having done the work.

Can a technician certified elsewhere perform UT under NBIC / R Stamp?

Not automatically. Employer-based certification ends when the holder leaves, so the new employer must certify them under its own written practice. Prior training and documented experience transfer as evidence; the certificate itself does not.

What equipment evidence does UT need under NBIC / R Stamp?

Calibration status traceable to the day of use, covering the instrument and its accessories — probes, cables, blocks and reference standards for ultrasonics; sources and densitometers for radiography. An in-calibration instrument with an out-of-calibration reference block fails the same way as an uncalibrated one.

How do UT requirements differ from the other methods in NBIC / R Stamp?

Scope, qualification and evidence are method-specific, so the differences are real rather than administrative. NBIC / R Stamp also covers RT, PT, MT, VT, ET, and each carries its own procedure, its own personnel qualification and its own equipment evidence.

Personnel certification for UT

Employer-based. NDE procedures and personnel are qualified in accordance with ASNT SNT-TC-1A, or the certificate holder makes arrangements with an outside NDE laboratory to provide the same. Subcontracted NDE is explicitly acceptable and is one of the specialised activities the review guidance expects to see subcontracted; welding is not treated the same way. The R Certificate Holder remains responsible for all work performed, including the subcontractor's. The one role that cannot be outsourced to the shop is the inspection itself: repairs and alterations must be verified by a National Board Commissioned Inspector employed by an Authorized Inspection Agency, commissioned centrally by the National Board under NB-263, RCI-1, Rules for Commissioned Inspectors.