ISO 23279 Characterization of Indications in Welds
ISO 23279 is the international standard for characterization of ultrasonic indications in welds as planar or non-planar, used to apply differential acceptance criteria from ISO 11666 to the most safety-critical (planar) discontinuities.
Definition
ISO 23279 uses scan pattern analysis, length-to-amplitude relationships, and echo-dynamic behavior to distinguish planar (crack-like, LoF) from non-planar (porosity, slag) indications. Planar indications are rejected at lower amplitudes.
Related terms
- ISO 17640 Ultrasonic Testing of Welds — ISO 17640 is the international standard for ultrasonic testing of fusion-welded joints, defining techniques (level A basic, B intermediate, C advanced, D special procedures) and acceptance criteria for weld inspection.
- Phased Array Ultrasonic Testing (PAUT) — PAUT is an advanced ultrasonic technique using a multi-element transducer (16–256 elements) with electronic beam steering and focusing, producing sectorial, linear, and compound scans for superior weld inspection and defect characterization.
More standard terms
ASME Section V · ASME Section VIII · ASME Section IX · ASME Section XI · ASME B31.1 Power Piping · ASME B31.3 Process Piping · ASME B31.8 Gas Transmission and Distribution Piping · ASME B31.4 Liquid Pipelines · API 510 Pressure Vessel Inspection Code · API 570 Piping Inspection Code
Where this comes up in practice
Terms like this one appear in three places that matter commercially: the written practice that governs how your personnel are qualified, the procedures and technique sheets that define how an examination is actually performed, and the evidence an auditor or client asks for when they want to know why an inspection was accepted. Getting the terminology right is the easy part; being able to produce the qualification record, the calibration traceability and the procedure revision that applied on the day of the inspection is the part that decides audits.
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