What is ISO 23865 about?
ISO 23865 gives general provisions for applying ultrasonic testing with arrays using FMC/TFM techniques and related technologies. It is intended to promote the adoption of good practice either at the manufacturing stage or for in-service testing of existing installations or for repairs.
Note 1: ISO 23865 considers materials like low-alloyed carbon steels and common aerospace-grade aluminium and titanium alloys, provided they are homogeneous and isotropic, but some recommendations are given for other materials (e.g., austenitic ones).
Note 2: ISO 23865 does not include acceptance levels for discontinuities.
Who is ISO 23865 for?
BS ISO 23865 on is useful for:
- Welders
- Welding engineers
- Safety regulatory bodies
- End consumers
Why should you use ISO 23865?
The Full Matrix Capture (FMC) is a technique for capturing all possible ultrasonic data from a phased array probe and the Total Focusing Method (TFM) is a technique using the data from this FMC to produce an image that is focused at every specified point in the image. Both FMC/TFM and phased array ultrasonic testing (PAUT) use an array probe where each element of the array is independent of the others.
Ultrasonic testing is useful to assess the volumetric integrity of welded material. This technique for weld inspection can be a big help in certain conditions to improve defects characterization.
One of the benefits of the FMC matrix is to record the original A-scan. This feature allows the end user to calculate the TFM image using more than one mode for one acquisition.
ISO 23865 provides FMC/TMC technique which improves the detection of directional (for example, planar crack-like) discontinuity in or adjacent to welds. Also helps manufacturers by providing them with improved detection of pitting corrosion and accurate mapping of general thickness loss.
