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GB/T 12604.1-2020Non-destructive testing - Terminology - Ultrasonic testing (English PDF)

无损检测 术语 超声检测

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

November 19, 2020

Implementation date

June 1, 2021

Scope

GB/T 12604.1-2020 is the English-translated version of 无损检测 术语 超声检测.

GB/T 12604.1-2020 fixes the terms used in ultrasonic non-destructive testing, as a common basis for other standards and for general use. It is Part 1 of GB/T 12604 and adopts ISO 5577:2017 by the redrafting method.

The vocabulary is arranged in four groups: terms relating to frequency, wave and pulse, terms relating to sound, terms relating to testing equipment and terms relating to ultrasonic testing, and the standard carries an index.

Terminology for ultrasonic phased array testing is not included. Informative annexes list the structural changes and technical differences against ISO 5577:2017 and the terms deleted, added and modified with respect to the previous edition.

It has no normative references. It replaces GB/T 12604.1-2005, was issued on 19 November 2020 and has applied since 1 June 2021.

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Document preview — GB/T 12604.1-2020

National Standard of the People's Republic of China

ICS
19.100
Classification
J 04
Replacing
GB/T 12604.1-2005

Issued by: State Administration for Market Regulation, China National Standardization Administration

Contents

  • Foreword
  • 1 Scope
  • 2 Normative references
  • 3 Terms related to "frequency", "wave" and "pulse"
  • 4 Terms related to "sound"
  • 5 Terms related to "testing equipment"
  • 6 Terms related to "ultrasonic testing"
  • Appendix A (informative appendix) Structural changes in this part compared with ISO 5577:2017
  • Appendix B (informative appendix) Technical differences between this part and ISO 5577:2017 and the reasons
  • Appendix C (informative appendix) Terms and definitions in GB/T 12604.1-2005 deleted from this section
  • Appendix D (informative appendix) Compared with GB/T 12604.1-2005, this section adds new terms and definitions
  • Appendix E (informative appendix) Terms and definitions modified in this section compared with GB/T 12604.1-2005
  • Reference
  • Index

Foreword

GB/T 12604 "Terms of Non-destructive Testing" is divided into 11 parts.

---GB/T 12604.1 Non-destructive testing term Ultrasonic testing;

---GB/T 12604.2 Non-destructive testing term radiographic testing;

---GB/T 12604.3 Non-destructive testing terminology penetration testing;

---GB/T 12604.4 Nondestructive Testing Term Acoustic Emission Testing;

---GB/T 12604.5 Non-destructive testing terminology magnetic particle testing;

---GB/T 12604.6 Non-destructive testing term eddy current testing;

---GB/T 12604.7 Non-destructive testing term leak detection;

---GB/T 12604.8 Non-destructive testing term neutron testing;

---GB/T 12604.9 Non-destructive testing term infrared testing;

---GB/T 12604.10 Non-destructive testing terminology magnetic memory testing;

---GB/T 12604.11 Non-destructive testing term X-ray digital imaging testing.

This part is Part 1 of GB/T 12604.

This section was drafted in accordance with the rules given in GB/T 1.1-2009.

This part replaces GB/T 12604.1-2005 "Non-destructive Testing Terminology Ultrasonic Testing", compared with GB/T 12604.1-2005, the main The main technical changes are as follows:

---Adjust the overall structure of the standard in accordance with ISO 5577:2017. The terms are divided into techniques related to "frequency", "wave" and "pulse".

There are four categories of language, terms related to "sound", terms related to "testing equipment", and terms related to "ultrasonic testing".

The medium is subdivided into subcategories, and each subcategory contains specific terms;

---Deleted some terms and definitions, see Appendix C for details;

---Added some new terms and definitions, see Appendix D for details;

---Modified some terms and definitions, see Appendix E for details.

This part uses the redrafting method to modify and adopt ISO 5577:2017 "Non-destructive Testing Ultrasonic Testing Terminology".

Compared with ISO 5577:2017, this part has many structural adjustments. Appendix A lists the chapters of this part and ISO 5577:2017. Article number comparison list.

Compared with ISO 5577:2017, this part has technical differences. The clauses related to these differences have been passed on the outer margins.

The vertical single line (|) is marked, and Appendix B gives a list of the corresponding technical differences and reasons. This section also made the following editorial changes.

---Modified the standard name to be consistent with the existing series of standards;

---The foreword of the international standard is deleted;

--- Increased the scope of standard application;

---Delete the suspension section under 6.6;

---Informative Appendix C has been added, which gives the deleted terms and definitions compared with GB/T 12604.1-2005;

---Informative Appendix D has been added, giving new terms and definitions compared with GB/T 12604.1-2005;

---Informative appendix E is added, which gives modified terms and definitions compared with GB/T 12604.1-2005.

1 Scope

This part of GB/T 12604 specifies the terms used for ultrasonic testing methods as a common basis for standards and general use. Headquarters The points do not include the terminology used in ultrasonic phased array testing. This section applies to ultrasonic testing.

Note: Ultrasonic phased array detection terms are defined in EN16018.

2 Normative references

There are no normative references in this section.

3 Terms related to "frequency", "wave" and "pulse"

3.1 Frequency

3.1.1 Frequency

The number of cycles per second.

Note: Expressed in Hertz (Hz).

3.1.2 Nominal frequency

The probe (5.2.1) frequency (3.1.1) marked by the manufacturer.

3.1.3 Test frequency

The detection system detects the effective ultrasonic frequency of the material or test piece.

3.1.4 Frequency spectrum

The distribution of amplitude (3.2.2) with respect to frequency (3.1.1).

Note: See Figure 1.

3.1.5 Center frequency

The arithmetic average of the upper and lower cutoff frequencies.

Note: See Figure 1.

3.1.6 Peak frequency

The frequency (3.1.1) corresponding to the maximum amplitude in the frequency spectrum (3.1.4).

Note: See Figure 1.

3.1.7 Cut-off frequency

The frequency (3.1.1) corresponding to the amplitude (3.2.2) when the amplitude is lower than the peak frequency (3.1.6) to a certain extent (such as 3dB).

Note: See Figure 1.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 60 pages — is available in the English PDF.

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