ISO 15626:2018
Non-destructive testing of welds — Time-of-flight diffraction technique (TOFD) — Acceptance levels
This document specifies acceptance levels for the time‑of‑flight diffraction technique (TOFD) of full penetration welds in ferritic steels from 6 mm up to 300 mm thickness which correspond to the quality levels of ISO 5817.
These acceptance levels are applicable to indications classified in accordance with ISO 10863.
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.Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Relation between quality levels and acceptance levels
6 Definition and determination of length and height
6.1 General
6.2 Determination of length
6.2.1 General
6.2.2 Length sizing of elongated straight indications
6.2.3 Length sizing of elongated curved indications
6.3 Determination of height
6.3.1 General
6.3.2 Surface‑breaking discontinuities
6.3.3 Embedded discontinuities
7 Acceptance levels
7.1 General
7.2 Indications from single discontinuities
7.2.1 General
7.2.2 Acceptance level 1
7.2.3 Acceptance level 2
7.2.4 Acceptance level 3
7.3 Total length of indications
7.4 Grouping of indications
7.5 Point‑like indications
Bibliography
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.Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Relation between quality levels and acceptance levels
6 Definition and determination of length and height
6.1 General
6.2 Determination of length
6.2.1 General
6.2.2 Length sizing of elongated straight indications
6.2.3 Length sizing of elongated curved indications
6.3 Determination of height
6.3.1 General
6.3.2 Surface‑breaking discontinuities
6.3.3 Embedded discontinuities
7 Acceptance levels
7.1 General
7.2 Indications from single discontinuities
7.2.1 General
7.2.2 Acceptance level 1
7.2.3 Acceptance level 2
7.2.4 Acceptance level 3
7.3 Total length of indications
7.4 Grouping of indications
7.5 Point‑like indications
Bibliography