DIN EN 15617 E : 2009

Foreword<br>1 Scope<br>2 Normative references<br>3 Symbols, terms and definitions<br>&nbsp;&nbsp;3.1 Symbols<br>&nbsp;&nbsp;3.2 Terms and definitions<br>4 Relation between quality levels and acceptance levels<br>5 Definition and determination of length and height<br>&nbsp;&nbsp;5.1 General<br>&nbsp;&nbsp;5.2 Determination of length<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.2 Length sizing of elongated straight indications<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.3 Length sizing of elongated curved indications<br>&nbsp;&nbsp;5.3 Determination of height<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.2 Surface-breaking discontinuities<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.3 Embedded discontinuities<br>6 Acceptance levels<br>&nbsp;&nbsp;6.1 General<br>&nbsp;&nbsp;6.2 Indications from single discontinuities<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.2.1 Acceptance level 1<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.2.2 Acceptance level 2<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.2.3 Acceptance level 3<br>&nbsp;&nbsp;6.3 Total length of indications<br>&nbsp;&nbsp;6.4 Grouping of indications<br>&nbsp;&nbsp;6.5 Point-like indications<br>Bibliography

Defines 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 EN ISO 5817.