GB/T 23902-2021Non-destructive testing - Ultrasonic testing - Time-of-flight diffraction technique as a method for detection and sizing of discontinuities (English PDF)

1 Scope

This document specifies the general principles of the Ultrasonic Time-of-Sound Diffraction (TOFD) method. This document is applicable to low alloy and carbon steel components

Discontinuous detection. This document is also applicable to other types of materials, provided that the number of components must be fully considered when using ultrasonic diffraction acoustic technology.

What shape and material acoustic properties and detection sensitivity.

This document is generally applicable to discontinuous testing in materials included in ISO 16810, including welds, which can be used as a reference. select

The reason for this method is its clear ultrasound probe position and scanning direction.

Unless otherwise specified in the cited documents, this document applies to the minimum requirements.

Unless expressly stated otherwise, this document applies to the following levels specified by ISO 16811.

---1 category, no restrictions;

- Category 2 and Category 3, the specified restrictions apply.

Note 1.Chapter 9 has similar instructions.

For category 4 and category 5, product testing requires special process procedures.

Note 2.Chapter 9 has similar instructions.

Note 3.ISO 10863 describes the use of TOFD for weld inspection technology.

Note 4.The relevant acceptance documents are given in ISO 15626.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

ISO 9712 Non-destructive testing personnel qualification and certification (Non-destructivetesting-Qualificationandcertifi- cationofNDTpersonnel)

ISO 16810 Non-destructive testing-Ultrasonic testing-General principles)

ISO 16811 non-destructive testing ultrasonic testing sensitivity and range setting (Non-destructive testing-Ultrasonic testing-Sensitivityandrangesetting)

EN12668-1 Non-destructive testing Ultrasonic testing equipment performance and inspection Part 1.Instruments (Non-destructive testing-

Characterizationandverificationofultrasonicexaminationequipment-Part 1.Instruments)

EN12668-2 Non-destructive testing Ultrasonic testing equipment performance and inspection Part 2.Probe (Non-destructive testing-

Characterizationandverificationofultrasonicexaminationequipment-Part 2.Probes)

EN12668-3 Non-destructive testing. Performance and inspection of ultrasonic testing equipment. Part 3.Combined equipment (Non-destructive testing-Characterizationandverificationofultrasonicexaminationequipment-Part 3.Combined equipment)

GB/T 23901.2 | GB/T 23901.3 | GB/T 23901.4 | GB/T 23904 | GB/T 23901.1 | […]