ASTM E1901-23

Standard Guide for Detection and Evaluation of Discontinuities by Contact Pulse-Echo Straight-Beam Ultrasonic Methods

SIGNIFICANCE AND USE
6.1 This guide provides procedures for the application of contact straight-beam examination for the detection and quantitative evaluation of discontinuities in materials.  
6.2 Although not all requirements of this guide can be applied universally to all examinations, situations, and materials, it does provide basis for establishing contractual criteria between the users, and may be used as a general guide for preparing detailed specifications for a particular application.  
6.3 This guide is directed towards the evaluation of discontinuities detectable with the beam normal to the entry surface. If discontinuities or other orientations are of concern, alternate scanning techniques are required.
SCOPE
1.1 This guide covers procedures for the contact ultrasonic examination of bulk materials or parts by transmitting pulsed ultrasonic waves into the material and observing the indications of reflected waves. This guide covers only examinations in which one search unit is used as both transmitter and receiver (pulse-echo). This guide includes general requirements and procedures that may be used for detecting discontinuities, locating depth and distance from a point of reference and for making a relative or approximate evaluation of the size of discontinuities as compared to a reference standard.  
1.2 This guide complements Practice E114 by providing more detailed procedures for the selection and standardization of the examination system and for evaluation of the indications obtained.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 This guide does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this guide to establish the appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Jun-2023
• ICS: 19.100 - Non-destructive testing
• Technical Committee: E07 - Nondestructive Testing
• Drafting Committee: E07.06 - Ultrasonic Method

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E1901 − 23
Standard Guide for
Detection and Evaluation of Discontinuities by Contact
1
Pulse-Echo Straight-Beam Ultrasonic Methods
This standard is issued under the fixed designation E1901; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2
1.1 This guide covers procedures for the contact ultrasonic 2.1 ASTM Standards:
examination of bulk materials or parts by transmitting pulsed E114 Practice for Ultrasonic Pulse-Echo Straight-Beam
ultrasonic waves into the material and observing the indica- Contact Testing
tions of reflected waves. This guide covers only examinations E127 Practice for Fabrication and Control of Flat Bottomed
in which one search unit is used as both transmitter and Hole Ultrasonic Standard Reference Blocks
receiver (pulse-echo). This guide includes general require- E317 Practice for Evaluating Performance Characteristics of
ments and procedures that may be used for detecting Ultrasonic Pulse-Echo Testing Instruments and Systems
discontinuities, locating depth and distance from a point of without the Use of Electronic Measurement Instruments
reference and for making a relative or approximate evaluation E543 Specification for Agencies Performing Nondestructive
of the size of discontinuities as compared to a reference Testing
standard. E1316 Terminology for Nondestructive Examinations
3
2.2 ASNT Standard:
1.2 This guide complements Practice E114 by providing
SNT-TC-1A Recommended Practice for Personnel Qualifi-
more detailed procedures for the selection and standardization
cation and Certification in Nondestructive Testing Person-
of the examination system and for evaluation of the indications
nel
obtained.
3
2.3 ANSI/ASNT Standard:
1.3 The values stated in inch-pound units are to be regarded
ANSI/ASNT CP-189 ASNT Standard for Qualification and
as standard. The values given in parentheses are mathematical
Certification of Nondestructive Testing Personnel
conversions to SI units that are provided for information only 4
2.4 Aerospace Industries Association Document:
and are not considered standard.
NAS-410 NAS Certification and Qualification of Nonde-
1.4 This guide does not purport to address all of the safety
structive Test Personnel
5
concerns, if any, associated with its use. It is the responsibility 2.5 ISO Standard:
of the user of this guide to establish the appropriate safety,
ISO 9712 Non-destructive testing — Qualification and cer-
health, and environmental practices and determine the appli- tification of NDT personnel
cability of regulatory limitations prior to use.
3. Terminology
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.1 Definitions—For definitions of terms used in this guide,
ization established in the Decision on Principles for the
see Terminology E1316.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Barriers to Trade (TBT) Committee.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
1
This guide is under the jurisdiction of ASTM Committee E07 on Nondestruc- 4th Floor, New York, NY 10036, http://www.ansi.org.
4
tive Testing and is the direct responsibility of Subcommittee E07.06 on Ultrasonic Available from Aerospace Industries Association of America, Inc. (AIA), 1000
Method. Wilson Blvd., Suite 1700, Arlington, VA 22209-3928, http://www.aia-aerospace.org.
Current edition approved July 1, 2023. Published July 2023. Originally approved
5
in 1997. Last previous edition approved in 2018 as E1901 – 18. DOI: 10.1520/ Available from International Organization for Standardization (ISO), 1, ch. de
E1901-23. la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1901 − 23
4. Basis for Application 6.3 This guide is directed towards the evaluation of discon-
tinuities detectable with the beam normal to the entry surface.
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1901 − 18 E1901 − 23
Standard Guide for
Detection and Evaluation of Discontinuities by Contact
1
Pulse-Echo Straight-Beam Ultrasonic Methods
This standard is issued under the fixed designation E1901; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This guide covers procedures for the contact ultrasonic examination of bulk materials or parts by transmitting pulsed ultrasonic
waves into the material and observing the indications of reflected waves. This guide covers only examinations in which one search
unit is used as both transmitter and receiver (pulse-echo). This guide includes general requirements and procedures that may be
used for detecting discontinuities, locating depth and distance from a point of reference and for making a relative or approximate
evaluation of the size of discontinuities as compared to a reference standard.
1.2 This guide complements Practice E114 by providing more detailed procedures for the selection and standardization of the
examination system and for evaluation of the indications obtained.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 This guide does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of
the user of this guide to establish the appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
E114 Practice for Ultrasonic Pulse-Echo Straight-Beam Contact Testing
E127 Practice for Fabrication and Control of Flat Bottomed Hole Ultrasonic Standard Reference Blocks
E317 Practice for Evaluating Performance Characteristics of Ultrasonic Pulse-Echo Testing Instruments and Systems without the
Use of Electronic Measurement Instruments
E428 Practice for Fabrication and Control of Metal, Other than Aluminum, Reference Blocks Used in Ultrasonic Testing
3
(Withdrawn 2019)
E543 Specification for Agencies Performing Nondestructive Testing
E1158 Guide for Material Selection and Fabrication of Reference Blocks for the Pulsed Longitudinal Wave Ultrasonic Testing
3
of Metal and Metal Alloy Production Material (Withdrawn 2019)
1
This guide is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.06 on Ultrasonic Method.
Current edition approved July 1, 2018July 1, 2023. Published July 2018July 2023. Originally approved in 1997. Last previous edition approved in 20132018 as
E1901 - 13.E1901 – 18. DOI: 10.1520/E1901-18.10.1520/E1901-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1901 − 23
E1316 Terminology for Nondestructive Examinations
3
2.2 ASNT Standard:
SNT-TC-1A Recommended Practice for Personnel Qualification and Certification in Nondestructive Testing Personnel
3
2.3 ANSI/ASNT Standard:
ANSI/ASNT CP-189 ASNT Standard for Qualification and Certification of Nondestructive Testing Personnel
4
2.4 Aerospace Industries Association Document:
NAS-410 NAS Certification and Qualification of Nondestructive Test Personnel
5
2.5 ISO StandardStandard:
ISO 9712 Non-destructive testing — Qualification and certification of NDT personnel
3. Terminology
3.1 Definitions—For definitions of terms used in this guide, see Terminology E1316.
4. Basis for Application
4.1 Contractual Agreement—The using parties cognizant engineering organization
...