Asnt Standards: Recommended Practice No. SNT-TC-1A, Personnel Qualification and

ASNT STANDARDS
Standards and Recommended Practices developed by ASNT define qualification and

certification for NDT personnel. Through ASNT committees, we facilitate top NDT experts and
business professionals in developing and defining personnel qualifications that support industries
and governments needs worldwide.
ASNT does not publish standards that describe how to perform NDT tasks; those are published
by ASTM International and other organizations standards that affect NDT users and are
highlighted in Codes and Standards Bodies Involved in NDT Industry.
Recommended Practice No. SNT-TC-

1A, Personnel Qualification and
Certification in Nondestructive Testing
Provides guidelines that can be used by companies to develop employer-based** in-house NDT
and PdM certification programs. Included are recommended skill levels for all levels of NDT
qualification, the recommended training and experience hours for Level I and Level II personnel,
and the examination eligibility requirements for Level III personnel. These guidelines can be
modified by employers and, when incorporated into a company’s Written Practice, become the
NDT certification requirements for that company. Information on certification program types,
written practices and other NDT program-related information can be found on the NDT
Certification page. The first edition of SNT-TC-1A was published in 1966, and it provided the
general format for the development of almost all other NDT certification standards in use
today. Product Number # 2072 (2016 Edition)
Responses to a collection of inquiries regarding various provisions of Recommended Practice

No. SNT-TC-1A by ASNT’s SNT-TC-1A Interpretation Panel can be purchased in the ASNT
Store, Interpreting SNT-TC-1A, 2016 Edition.
ANSI/ASNT CP-189, ASNT Standard

for Qualification and Certification of
Nondestructive Testing Personnel
This employer-based standard establishes the minimum requirements for the qualification and
certification of nondestructive testing (NDT) and Predictive Maintenance (PdM) personnel. An
American National Standard (ANS), CP-189 provides requirements as opposed to the guidelines
of SNT-TC-1A. A collection of inquiries regarding various provisions of CP-189 and the
responses from the ASNT Standard Development Committee's Interpretation Subcommittee can
be accessed here. Product Number # 2511 (2020 edition)
ANSI/ASNT CP-105, ASNT Standard

Topical Outlines for Qualification of
Nondestructive Testing Personnel
This standard provides training outlines for Level I and Level II personnel and topical outlines
for the qualification of Level III NDT personnel and details the minimum training course content
for those personnel. CP-105 is the compilation and updated revision of the Recommended
Training Course Outlines formerly found in Recommended Practice No. SNT-TC-1A and CP-
189. CP-105 comes with SNT-TC-1A and CP-189 when those documents are purchased. Product
Number # 2823 (2020 edition)
ANSI/ASNT CP-106, Nondestructive
Testing - Qualification and Certification
of Personnel
This is the U.S. adoption of ISO 9712:2005 as modified in accordance with ISO Guide 21 and
provides certification requirements for personnel certifying in the ET, MT, PT, RT, UT & VT
test methods. This is a “central” certification system that requires certification examinations to be
administered by an accredited third-party certification body. Product Number # 2826 (2018
edition)
ANSI/ASNT ILI-PQ-2010, In-line
Inspection Personnel Qualification and
Certification Standard
This ANS establishes the minimum requirements for the qualification and certification of in-line
inspection (ILI) personnel, and was developed to address the Operator Qualification
requirements of 49CFR192 and 49CFR195 see the Code of Federal Regulations section of this
web page. Product Number # 2801 (2010 Reaffirmation)
More Information
Learn about the differences between Codes, regulatory requirements, standards, specifications
and recommended practices that are used in all aspects of construction, fabrication,
manufacturing and inspection.
Learn more about the ASNT’s Standards Development Committee.

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ASNT STANDARDS

Standards and Recommended Practices developed by ASNT define qualification and

Recommended Practice No. SNT-TC-

Responses to a collection of inquiries regarding various provisions of Recommended Practice

ANSI/ASNT CP-189, ASNT Standard

ANSI/ASNT CP-105, ASNT Standard

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