1 Scope
This document specifies the application of the TFM technique and related technologies
for semi- or fully automated ultrasonic testing of fusion- welded joints in metallic
materials of minimum thickness 3,2 mm.
NOTE Unless stated otherwise, in this document ‘TFM” and ‘TFM technique” refer to the TFM
technique as defined in ISO 23243, and to all related technologies, see for example ISO 23865 and ISO 23243.
This document is applicable to components with welds fabricated using metals which
have isotropic (constant properties in all directions) and homogeneous conditions.
This includes welds in low carbon alloy steels and common aerospace grade aluminium
and titanium alloys, provided they are homogeneous and isotropic.
This document applies to full penetration welded joints of simple geometry in plates,
pipes and vessels.
This document specifies four testing levels (A, B, C, D), each corresponding to a
different probability of detection of imperfections. Guidance on the selection of
testing levels is provided. Coarse-grained metals and austenitic welds can be tested
when the provisions of this document have been taken into account.
This document gives provisions on the specific capabilities and limitations of the
TFM technique for the detection, locating, sizing and characterization of discontinuities
in fusion-welded joints. The TFM technique can be used as a stand-alone approach or
in combination with other non-destructive testing (NDT) methods for manufacturing,
in-service and post-repair tests.
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BS EN ISO 23864:2021 history
0000 BS EN ISO 23864:2021(2022)
2022BS EN ISO 23864:2021 Non-destructive testing of welds. Ultrasonic testing. Use of automated total focusing technique (TFM) and related technologies