ASNT vs PCN 2026 — The Honest Decision Matrix for Globally Mobile NDT Inspectors
What's the difference between PCN and ASNT NDT courses?
Both teach the same NDT methods, but they lead to different certificates. A PCN course prepares you for central ISO 9712 examinations taken at a BINDT-authorised centre, and the certificate is yours. An ASNT-route course supplies the training hours your employer's SNT-TC-1A written practice requires; the employer then examines and certifies you, or you sit ASNT's central exams.
See the ISO 9712 vs SNT-TC-1A comparison and ASNT certification requirements.
Reviewed by Atlantis NDT founder Anoop Rayavarapu, ASNT NDT Level III in five methods (UT, RT, MT, PT, VT), with 11+ years of international NDT field experience. The ASNT-vs-PCN question is never really about which is better; it is about which scheme your next employer accepts and what re-qualification cost you face if you mobilise. This comparison strips away the marketing on both sides.
ASNT — SNT-TC-1A 2024, CP-189-2020, ASNT 9712 (which replaced ACCP) — The American Stack
ASNT (American Society for Nondestructive Testing, founded 1941) administers three schemes. SNT-TC-1A 2024 — Recommended Practice, employer-based qualification per §6.3, certificate held by employer, vendor-mobile but employer-bound; accepted by Aramco SAEP-1112 §6.2.3, ADNOC GMTS-100 Annex F, Shell DEP 31.10.13.31 §7.4 for routine inspection. CP-189-2020 — Standard for Qualification and Certification, third-party central certification through ASNT, certificate portable, proctored body-of-knowledge exam; required by ExxonMobil GP 18-10-01 §3.4.2 and Marathon Petroleum MP-ITP-0042 §5.1 for critical-service piping. ASNT 9712 (which replaced ACCP) — ASNT's third-party programme designed to meet ISO 9712:2021, examined and issued by ASNT to the individual, alongside ASNT's own ASNT NDT Level II and ASNT NDT Level III credentials.
PCN — BINDT, ISO 9712:2021 (EN ISO 9712:2022) — The European Stack
PCN (Personal Certification in Nondestructive Testing) — administered by BINDT (British Institute of Non-Destructive Testing, founded 1976) — is the UK/European third-party central certification scheme aligned to ISO 9712 (ISO 9712:2021, adopted in Europe as EN ISO 9712:2022). Certificate portable, no employer dependency, valid 5 years with annual visual + 10-year re-examination. Mandatory across the EU pressure-equipment directive PED 2014/68/EU per Annex I §3.1.3, on BP North Sea Worley framework, on Equinor Norwegian-shelf platforms per NORSOK M-101, on Shell UK Brent decommissioning, and on UK nuclear Sellafield + EDF Heysham frameworks. Aerospace work is governed by NAS 410 or EN 4179 under the employer's written practice, not by PCN or ASNT alone.
Side-by-Side — Scheme Type, Portability, Re-Cert, Cost, Employer Acceptance
Scheme type — ASNT SNT-TC-1A employer-based; ASNT CP-189 central; ASNT 9712 central; PCN central. Portability — SNT-TC-1A bound to employer (re-qualify on job change); CP-189 portable; ASNT 9712 portable; PCN portable. Re-certification cycle — SNT-TC-1A 5 years + annual vision Jaeger No. 1 + colour every 5 years; CP-189 5 years proctored re-exam; ASNT 9712 renewal under its ISO 9712-based rules; PCN 5 years annual visual + 10-year full re-exam. Fees — each scheme's examination fees are set and published by its own body (ASNT or BINDT). Employer acceptance — Aramco / ADNOC / Shell / ExxonMobil accept ASNT (preferring CP-189 for critical service); BP / Equinor / EDF / Sellafield / EU PED scope require PCN or ISO 9712; aerospace work follows NAS 410 or EN 4179 under the employer's written practice.
Code Coverage — ASME Section V, ISO 17636, ISO 17640, EN ISO 9712, NACE MR0175
ASNT-certified inspectors work natively against ASME B&PV Section V Article 2 (RT), Article 4 (UT including Mandatory Appendix VIII PAUT, Appendix III TOFD), Article 6 (PT), Article 7 (MT), Article 8 (ET), Article 9 (VT), plus ASTM E2491 PAUT performance, ASTM E1444 MT compliance, ASTM E1417 PT compliance. PCN inspectors work natively against ISO 17636-1 (film RT EU), ISO 17636-2 (digital RT), ISO 17640 (UT weld), ISO 17638 (MT ferritic), ISO 3452-1 (PT), ISO 17643 (ET), EN 13018 (VT), ISO 10863 (TOFD). Both stacks converge on NACE MR0175 / ISO 15156 hardness limits for sour service. Atlantis Academy tracks an inspector's dual-stamp record — ASNT certification under your employer's written practice, or ASNT's own central credential, and ISO 9712 or PCN sat through their own accredited body — so an inspector mobilising from Aramco SAES-W-012 (ASME-anchored) to Equinor NORSOK M-101 (ISO-anchored) has an audit-ready record of both. See Atlantis ISO 17024.
The Practical Recommendation — Which to Hold, in What Order, on What Budget
For a US-anchored career (Houston, Permian, Gulf Coast, Marathon, ExxonMobil, Aramco contractor): ASNT SNT-TC-1A Level II → CP-189 Level II → ASNT NDT Level III. For a UK / North Sea / EU career (Aberdeen, Stavanger, Rotterdam, BP / Shell UK / Equinor): PCN Level 2 → PCN Level 3 sat through BINDT, optionally paired with an ASNT credential, which ASNT examines and issues. For a GCC career (Riyadh, Dammam, Abu Dhabi, Doha, Manama, Kuwait): CP-189 Level II + ASNT NDT Level III (examined and issued by ASNT), with an ISO 9712 credential from its own accredited body if you cross to ADNOC frameworks. For an aerospace career (Seattle, Toulouse, Bangalore HAL, Reliance Aerospace, Boeing tier-1): certification to NAS 410 or EN 4179 under the employer's written practice, with ASNT NDT Level III or PCN Level 3 as supporting evidence where the written practice allows. Atlantis delivers training on-site at the client's facility or as self-paced online theory with Level III support — see Training, Academy, ASNT certification, API 510, API 570, API 653, ERP, Digital Twins, Consulting, ISO 9001, ISO 17024, Partner Program, NDT reporting software, AI defect detection, 3D scanning, Aerospace, Offshore wind.
Aerospace Composite Primary Structure — Why Dual-Stamp Is the Only Safe Profile
Boeing D6-51991 §B.4.3 accepts both ASNT NDT Level III and PCN Level 3 for composite-primary-structure PAUT per ASTM E2491 inspection — but the practical reality on tier-1 supplier audits (Spirit AeroSystems, GKN Aerospace, Mitsubishi Heavy Industries, Kawasaki Heavy Industries, Subaru, ShinMaywa, Korea Aerospace Industries, Tata Advanced Systems, Mahindra Aerospace, HAL Bengaluru) is that audit panels evaluate composite Level III inspectors against both schemes simultaneously. A single-stamp inspector who can recite SNT-TC-1A §6.3 but stumbles on ISO 9712 requirements loses points; the reverse holds for PCN-only inspectors challenged on CP-189 §8.3. Airbus AITM 6-4005 favours PCN Level 3 as primary; ASNT NDT Level III is accepted on demonstrated equivalency — but a dual-stamp file removes ambiguity. The same logic applies to nuclear primary loop (ASME Section XI Appendix VII calls SNT-TC-1A central; UK + EU primary-circuit inspection at Sellafield, EDF Heysham, EDF Hinkley calls PCN), offshore wind monopile inspection (Equinor Hywind, Ørsted Hornsea on NORSOK M-101 calls ISO 9712), and LNG cryogenic-service PAUT (QatarEnergy NFE accepts ASNT; Equinor Hammerfest calls ISO 9712).
ISO 9712:2021 and EN ISO 9712:2022 — which edition applies
The current edition of the international standard is ISO 9712:2021, and Europe adopted it as EN ISO 9712:2022. Certification bodies, including the PCN scheme, publish how they apply the standard and when renewals move to the current edition, so check the certification body's own scheme documents before you renew. The levels, exams, experience and renewal steps are in ISO 9712 certification.
Sour-Service Refining + Nuclear + Aerospace — The Three Pressure-Cooker Specialisations
The cross-scheme decision matrix collapses to specialisation pressure-cookers. Sour-service refining + petrochem under NACE MR0175 / ISO 15156 — ASNT dominant on Aramco / ADNOC / Shell / ExxonMobil / Marathon / Reliance / IOCL / KOC / KNPC / QatarEnergy / Petronas; ISO 9712 + PCN bridging where EU PED 2014/68/EU + Equinor NORSOK M-101 scope intersects. Nuclear primary loop under ASME Section XI Appendix VII — ASNT SNT-TC-1A / CP-189 dominant in US NRC fleet; PCN dominant on UK Sellafield + EDF Heysham + EDF Hinkley; ASNT + PCN dual-stamp safest on cross-border decom (Three Mile Island legacy + Fukushima support). Aerospace composite primary structure per Boeing D6-51991 + Airbus AITM 6-4005 — certification is to NAS 410 or EN 4179 under the employer's written practice, with ASNT NDT Level III or PCN Level 3 as supporting evidence where it allows. Atlantis Academy delivers the ASNT SNT-TC-1A track behind all three profiles and tracks the PCN / ISO 9712 / ASNT 9712 third-party credentials an inspector adds through their own accredited body.
Frequently Asked Questions
Is ASNT or PCN more recognised globally?
ASNT dominates the Americas + GCC + Boeing-supplier aerospace; PCN dominates UK + EU + Norwegian shelf + Airbus-supplier aerospace. Globally mobile inspectors stack both.
Do I need to re-take exams if I move from ASNT to PCN?
No automatic equivalency between schemes, and Atlantis does not run PCN bridging exams — those are sat through BINDT-approved centres — but Atlantis Academy can map the common body-of-knowledge.
Is SNT-TC-1A really inferior to CP-189?
Not inferior — different. SNT-TC-1A is employer-based; CP-189 is portable. Both meet Aramco / ADNOC routine inspection. CP-189 is required for ExxonMobil critical-service and many tier-1 contractor pools.
How does the cost of PCN compare to ASNT?
ASNT and BINDT each set and publish their own examination fees, and they change from time to time, so compare the current schedules on asnt.org and bindt.org. ASNT's current central examination fees are summarised on the ASNT certification page.
Does Atlantis run PCN examinations?
No. PCN examinations are administered by BINDT-approved centres, and ISO 9712 examinations by third-party bodies like Lloyd's Register, TUV, BV or DNV. Atlantis trains and examines only under the employer's SNT-TC-1A or CP-189 written practice.
Does ASNT NDT Level III replace PCN Level 3 for aerospace work?
Aerospace work is governed by NAS 410 or EN 4179, under the employer's written practice and the prime's requirements. A current ASNT NDT Level III may be accepted as evidence for the general examination where the written practice says so, but the specific and practical exams are still taken on the employer's procedures and hardware. See the NAS 410 certification requirements.
Are vision requirements different?
Both require near-vision (Jaeger No. 1) annually + colour-perception periodically. ISO 9712 §7 wording differs from SNT-TC-1A §8.2 but the operational requirement is equivalent.
Get certified, or certify your team
Individuals train and sit examinations under their employer's written practice. Employers need that written practice, and a Level III to run it. Atlantis does both.
Speak to an ASNT NDT Level III
Discuss your inspection requirements with Atlantis NDT. Include the asset, method, location and documents you need reviewed.
Hold ASNT for North America and the GCC; hold PCN for the UK, EU and Norwegian shelf. The split is legal, not technical: EU pressure-equipment work in the higher categories requires third-party approval of NDT personnel under PED 2014/68/EU, and PCN is the UK body issuing it. SNT-TC-1A certification is employer-held and does not travel; CP-189, ASNT 9712 (formerly ACCP) and PCN do.
The two schemes differ in who holds the certificate, and that single fact drives every practical consequence. SNT-TC-1A is a recommended practice: the employer writes a Written Practice, qualifies the individual against it, and holds the certificate — so it ends at the employer's gate. ASNT CP-189, ASNT 9712 and PCN are central certifications held by the individual and carried between employers. Geography then decides which one is enforceable. In the United States, ASNT-based certification is the working default; in Canada, most work asks for the national scheme, CAN/CGSB-48.9712, certified by the Natural Resources Canada certification body or CWB Group, with ASNT used by employers that run their own written practice. Across the EU, third-party approval of NDT personnel is a legal requirement for higher pressure-equipment categories under PED 2014/68/EU, which is why PCN and ISO 9712 dominate UK, EU and Norwegian-shelf work. Inspectors who mobilise across both blocs hold one central certificate from each side rather than re-qualifying at every border.
Source: ASNT SNT-TC-1A (2024 edition) §6.3; ASNT CP-189-2020; ISO 9712:2022; Directive 2014/68/EU (PED) Annex I §3.1.3, third-party approval of NDT personnel; CAN/CGSB-48.9712.
| Career anchor | Certify first | Add second | What the sequence buys |
|---|---|---|---|
| US Gulf Coast, Permian, Midwest refining | ASNT SNT-TC-1A Level II | ASNT CP-189 Level II | Portability the day you leave the employer that certified you |
| Canada — pipelines and federally regulated work | NRCan NDTCB or CWB Group to CAN/CGSB-48.9712 | ASNT CP-189 Level II | The regulator names CAN/CGSB-48.9712; ASNT covers private-sector and cross-border scopes |
| UK and Norwegian shelf | PCN Level 2 | PCN Level 3 | Operator frameworks and NORSOK-anchored scopes are written to ISO 9712 |
| EU fabrication inside PED scope | PCN or ISO 9712 Level 2 | — | Third-party personnel approval is a legal requirement, not a preference |
| GCC — Aramco, ADNOC, QatarEnergy | ASNT CP-189 Level II | ISO 9712 bridge | ASNT is the baseline; the bridge opens UK and EU-led EPC packages |
| Aerospace tier-1 supply | ASNT NDT Level III | PCN Level 3 | Boeing and Airbus supplier audits evaluate candidates against both stacks |
I hold SNT-TC-1A Level II and I am changing employers — what happens to it?
It does not travel, because your employer issued it against its own Written Practice. The new employer re-qualifies you under its Written Practice, and your documented training hours, experience hours and examination records transfer as supporting evidence rather than as certification. Holding ASNT CP-189 alongside it removes the problem entirely, because CP-189 is centrally issued and portable between employers.
Does PCN require an employer at all?
No. PCN is issued by BINDT to the individual, valid five years, with an annual vision check and full re-examination at ten years. There is no employer dependency and no re-qualification on a job change. That is why it is the working currency for contract inspectors moving between North Sea operators, EU fabrication shops and decommissioning packages.
Which scheme qualifies me for US nuclear in-service inspection?
Neither on its own. US nuclear ISI layers a performance-demonstration requirement on top of personnel certification: you qualify by detecting and sizing flaws in blind test blocks representative of the components in scope. Holding ASNT Level II or Level III is the prerequisite, not the qualification. Plan the demonstration programme as a separate step from certification.
What does each scheme require at renewal?
SNT-TC-1A runs a five-year cycle with annual near-vision testing and periodic colour-perception testing, renewed by your employer. CP-189 and ASNT 9712 run five-year cycles through ASNT. PCN runs five years with an annual vision check, then full re-examination at ten years against the current ISO 9712 body of knowledge. Letting any of them lapse means re-examination, not reinstatement.
Can PCN experience count toward an ASNT Level III application?
Yes as experience, no as certification. There is no automatic equivalency between the schemes, so PCN Level 3 does not convert into ASNT Level III. Documented method experience, training hours and examination history are accepted as supporting evidence on the ASNT application, which is exactly what makes a bridging route shorter than starting the body of knowledge from zero.
Which scheme do Canadian employers name?
CAN/CGSB-48.9712. Canada runs its own national certification to CAN/CGSB-48.9712, an identical adoption of ISO 9712, with certificates issued by the Natural Resources Canada certification body or CWB Group. ASNT certification is held in Canada and accepted on some private-sector scopes, but it does not substitute for CAN/CGSB-48.9712 certification where a regulator or contract names it.
Turning a comparison into a policy
Choosing between schemes is one question; writing a defensible in-lieu-of policy is the one your auditor will ask.