Building an NDT Certification Programme That Survives a Client Audit

Certification Is an Employer Act, Not an ASNT Act

The most expensive misunderstanding in personnel qualification is the belief that ASNT certifies technicians. Under SNT-TC-1A it does not. SNT-TC-1A is a recommended practice: a set of guidelines an employer adopts, adapts and publishes as its own written practice, after which the employer certifies its own people against that document. The certification is an internal act, evidenced by an internal record, and it ends when the employment ends. A technician who leaves with a wallet card and no employer behind it holds a historical document, not a live certification.

ISO 9712 works the other way round and it is worth understanding the contrast precisely, because contracts increasingly name both. Under ISO 9712 an independent certification body examines the candidate and issues the certificate, which belongs to the individual and survives a change of employer. That is central, third-party certification. Under SNT-TC-1A the employer is both examiner and certifier, which is why the quality of the written practice, and the independence and competence of the Level III behind it, carry so much weight.

ANSI/ASNT CP-189 sits between the two in spirit. It is a standard rather than a recommended practice, it is more prescriptive than SNT-TC-1A, it sets minimum requirements the employer may exceed but may not relax, and it requires the responsible Level III to hold ASNT Level III certification rather than simply being appointed by the employer. Certification is still employer-issued. Clients who want the employer-based model without the employer-defined flexibility ask for CP-189 by name.

What the Written Practice Must Actually State

A written practice is not a policy statement. It is an operating document, and an auditor reads it looking for specifics. It must define the scope: which methods, which levels and which techniques the employer certifies. It must set the education, training and experience requirements for each level in each method, and say how prior training and experience from another employer are evaluated and credited. It must describe the training programme content, and identify who is responsible for delivering it.

It must then describe examinations in detail: which examinations apply at each level, who prepares them, who administers and grades them, the passing grades for each part and the composite, the rules for re-examination after a failure, and how examination material is controlled so that it cannot leak into the training room. It must state vision requirements and their frequency, the certification and recertification process and interval, the treatment of interrupted service, and how technical performance is evaluated where recertification relies on continuing satisfactory performance rather than re-examination.

Finally it must deal with the administrative layer that most practices skip: which records are kept and for how long, who holds them, how a certification is suspended or revoked, how limited certifications are described, and what happens when an outside agency or an outside Level III is used. The practice must be revision controlled, dated, signed by the responsible Level III, and written against the specific edition of SNT-TC-1A or CP-189 that your contracts invoke. A practice referencing a superseded edition while the purchase order calls out a current one is a finding on its own.

Hours: Training and Experience by Method and Level

Hour requirements are the part of the programme most often quoted and least often documented. SNT-TC-1A Table 6.3.1A gives recommended initial training hours and minimum experience hours in the method for each level, and they differ sharply by method. Ultrasonic, radiographic and eddy current testing sit at 40 training hours and 210 experience hours for Level I. Magnetic particle sits at 12 and 70, liquid penetrant at 4 and 70, visual at 8 and 70. Level II adds further training hours and a substantially larger experience requirement in the same method.

Two details cause most of the trouble. First, the table also specifies a minimum number of total hours in all NDT methods combined, separate from the method hours, and many employers track only the method column. Second, the hours in the table are for the high school graduate education tier; candidates with two years or more of engineering or science study sit on a tier with reduced experience hours, but only if the education is evidenced in the file. No education tier reduces the training hours, and a candidate certified directly to Level II must still satisfy the Level I requirements.

Experience means documented hours acquiring data in the method under qualified supervision. The defensible form is a log with dates, the component or specimen, the technique and the supervising Level II or III, totalled and signed. A single number written on a certification form is not a log, and an auditor who cannot reconstruct how the total was reached will treat the certification date as unsupported. This one control, kept properly from a technician's first week, prevents more findings than any other.

The Three Examinations and How They Are Graded

Qualification examinations come in three parts. The general examination covers the principles of the method and is not specific to the employer. The specific examination covers the employer's own equipment, procedures, techniques and the acceptance criteria of the codes actually used, which is why a specific examination that could be sat at any company in the city is not really a specific examination. The practical examination is hands-on: the candidate sets up equipment, performs a calibration, examines specimens and records results on the employer's own forms.

Grading under SNT-TC-1A is normally a minimum of 70 percent on each examination with a composite of at least 80 percent, and the written practice must state the figures it uses. Examinations are prepared and graded by or under the direction of the responsible Level III. The retained record should show the examination version, the date, the grade for each part, the composite and the grader, and for the practical it should show which specimens were used and what conditions they contained. Practical examinations graded with no retained checklist and no record of the specimens are common and are always questioned.

There is also a control question that auditors ask and that surprises people: how do you keep examination material out of the training material? An employer whose Level III writes the course, writes the examination and grades it needs a demonstrable separation between the question bank and the classroom handouts. Where an outside Level III is engaged, that separation is easier to evidence, which is one of the practical arguments for using one.

The Level III Question: Who Writes and Grades Your Examinations

Every certification programme rests on a Level III. That person establishes or approves the written practice, prepares and administers examinations, approves procedures, and recommends certification. Under CP-189 the responsible Level III must hold ASNT Level III certification. Under SNT-TC-1A the employer defines how the Level III is qualified, and the usual and defensible route is ASNT Level III certification in the applicable methods plus an employer certification record for that individual as well.

Small and mid-sized Houston contractors frequently do not employ a Level III in every method they sell, and the legitimate answer is to contract one. What makes that arrangement defensible is documentation: a written agreement defining the scope of services and the methods covered, evidence that the Level III actually prepared and graded the examinations rather than rubber-stamping them, a signature on the written practice and on the procedures, and a record of site visits or reviews. An outside Level III whose only trace in the system is a name on a cover page will not satisfy an owner auditor.

The recurring omission is the Level III's own file. Companies produce an ASNT Level III certificate for the individual and nothing else, when the written practice normally also requires an employer certification record, a current vision examination and evidence of the basic and method examinations relied upon. Because the Level III signs everyone else's certifications, a gap in that one file propagates through the whole programme, which is why experienced auditors ask for it first.

Records: What the Auditor Asks For, in Order

An owner audit of personnel records follows a predictable sequence, and knowing it lets you prepare. The auditor asks for the written practice first and checks the edition against the contract. Then the organisation chart and the Level III's own file. Then a sample of technician files, usually chosen from the sign-offs on reports the owner already holds, which means the sample is not random and the weakest files tend to be the ones selected.

Inside each file the order is education evidence, training records with hours and content, the experience log, the three examination results, the vision record, and the signed certification statement with its scope and limitations. The auditor then cross-checks dates against reports: was the technician certified in that method, at that level, with that scope, on the day the report was signed. Certification dates that precede the completion of experience hours, examination dates that fall on a day the technician was demonstrably on site elsewhere, and vision examinations dated in a block for the whole crew are the classic discoveries.

The findings that recur most across Gulf Coast contractors are worth listing plainly: a written practice referencing a superseded edition; an experience total with no underlying log; a general examination identical across two different methods; a practical with no retained specimen record; an expired vision record; a technician performing a technique outside the scope of a limited certification; recertification by continuing satisfactory performance with no documented evidence of performance; and subcontract technicians accepted on the face of a certificate with no verification of the issuing written practice. None of these is about ability. All of them are avoidable with an hour a month of file discipline.

Vision, Recertification and Interrupted Service

Vision requirements are simple and are still the most frequently expired item in a file. Near-vision acuity is verified annually at the standard the written practice specifies, in at least one eye, corrected or uncorrected, and colour or shade contrast differentiation is verified at the interval the written practice sets. The examination must be administered by someone the practice authorises, and the record must name them. A vision record that lapsed for three months invalidates certification for that window, and every report signed inside it becomes contestable.

Recertification is recommended at intervals not exceeding five years for all levels. The written practice must say which route applies: re-examination, or evidence of continuing satisfactory technical performance. If it chooses the second route, it must define what evidence counts, who assesses it and how it is recorded, because an assertion of satisfactory performance with nothing behind it is not evidence. Many practices are stronger if they simply require re-examination, since the documentation burden is lower than the burden of proving performance.

Interrupted service is the clause most practices leave vague, and it is the one that bites when a technician returns from a year on another method or another industry. A defensible clause states the length of absence from the method that triggers action, what refresher training is required, which examinations must be repeated, and how the reinstatement is recorded and dated. Reinstatement never erases the gap; the record should show the original certification, the interruption and the reinstatement date as a sequence an auditor can follow.

SNT-TC-1A, CP-189, ISO 9712 and NAS 410: Matching the Scheme to the Contract

The scheme is chosen by your contracts, not by preference. The great majority of Gulf Coast fabrication, refining and pipeline work runs on SNT-TC-1A through the employer written practice, invoked by ASME Section V Article 1 or by an owner specification. Nuclear scope and parts of the defence supply chain call for CP-189 because the client wants a standard rather than an adaptable recommended practice. Aerospace work runs on NAS 410, which imposes its own training, experience and examination structure and its own expectations of the responsible Level III.

ISO 9712 appears in Houston mostly through international operators, offshore contracts and export fabrication where a client outside North America is buying. Because ISO 9712 certification is central and individual, it does not by itself satisfy a contract that requires employer certification to a written practice based on SNT-TC-1A. The clean answer is to certify the technician under your written practice and to treat the ISO 9712 certificate as strong supporting evidence of training and examination, documenting how you evaluated it.

Employers with mixed contract books should not attempt one hybrid document. It is cleaner to hold a written practice built on the dominant scheme and to write explicit annexes for the exceptions, so that a technician working an aerospace order and a refinery order in the same quarter has a traceable qualification for each. This is exactly the work an outside Level III can do quickly, and it removes the most common cause of a lost bid: a prequalification questionnaire that the contractor cannot answer honestly.

Houston: Who Imposes the Requirement and How It Gets Checked

Houston applies more certification scrutiny than most markets simply because of who buys the work. The refining and petrochemical operators along the Ship Channel and down to Texas City run contractor prequalification and periodic quality audits in which personnel records are a standing agenda item, and many require access credentials and site-specific orientation before a technician sets foot on a unit. Fabrication and repair organisations across the north and west of the metro hold code stamps and repair certifications whose quality systems are surveyed on a cycle, and NDT personnel qualification is examined during those surveys.

The requirement also arrives through routes that are not obviously about NDT. Federal process safety management rules for covered facilities require that inspections and tests on process equipment be performed by trained and qualified personnel, and owners implement that by auditing their contractors' certification programmes. Pipeline operators carry their own federal obligations and push qualification requirements down to inspection contractors. Structural fabricators working to AWS and to structural certification programmes carry ultrasonic operator qualification requirements of their own. A Houston inspection contractor can easily be answering to four different flavours of the same question in a single quarter.

The practical consequence for an employer is that the written practice is a commercial document as much as a technical one. It is read by prospective clients during prequalification, produced during audits, and relied on when a report is challenged. Atlantis NDT works with Gulf Coast employers as an ASNT Level III resource: authoring and revising written practices, building method-specific examination banks and practical specimens, running Level I, II and III training to SNT-TC-1A and ISO 9712 across UT, RT, MT, PT, ET, VT, PAUT and TOFD, and preparing certification files to survive an owner audit. Affordable, accessible and fully customisable; request a consultation or a quote at info@atlantisndt.com.

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