BS EN 12680-2:2003 – Founding — Ultrasonic examination — Part 2: Steel castings for highly stressed components
1 Scope
This European Standard specifies the requirements for the ultrasonic examination of steel castings (with ferritic structure) for highly stressed components and the methods for determining internal discontinuities by the pulse echo technique.
This European Standard applies to the ultrasonic examination of steel castings which have usually received a grain refining heat treatment and which have wall thicknesses up to and including 600 mm.
For greater wall thicknesses, special agreements apply with respect to test procedure and recording levels.
This European Standard does not apply to austenitic steels and joint welds.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 583-1, Non-destructive testing — Ultrasonic examination — Part 1: General principles.
EN 583-2, Non-destructive testing — Ultrasonic examination — Part 2: Sensitivity and range setting.
EN 583-5:2000, Non-destructive testing — Ultrasonic examination — Part 5: Characterization and sizing of discontinuities.
EN 12223, Non-destructive testing — Ultrasonic examination — Specification for calibration block No. 1.
EN 12668-1, Non-destructive testing — Characterization and verification of ultrasonic examination equipment — Part 1: Instruments.
EN 12668-2, Non-destructive testing — Characterization and verification of ultrasonic examination equipment — Part 2: Probes.
EN 12668-3, Non-destructive testing — Characterization and verification of ultrasonic examination equipment — Part 3: Combined equipment.
EN 27963, Welds in steel — Calibration block No. 2 for ultrasonic examination of welds (ISO 7963:1985).
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
NOTE Other terms and definitions used in this European Standard are given in EN 583-1, EN 583-2, EN 583-5 and EN 1330-4.
3.1
reference discontinuity echo size
smallest indication to be recorded during the assessment phase of an ultrasonic examination, usually expressed as an equivalent flat-bottomed hole diameter
3.2
point discontinuity
discontinuity, the dimensions of which are smaller than or equal to the sound-beam diameter
NOTE Dimensions in this standard relate to length, width and/or dimension in through-wall direction.
3.3
complex discontinuity
discontinuity, the dimensions of which are larger than the sound-beam diameter
NOTE Dimensions in this standard relate to length, width and/or dimension in through-wall direction.
3.4
planar discontinuity
discontinuity having two measurable dimensions
3.5
volumetric discontinuity
discontinuity having three measurable dimensions
3.6
special rim zone
outer rim zone part with special requirements (for e.g. machined surfaces, higher stresses, sealing surfaces)
3.7
production welding
any welding carried out during manufacturing before final delivery to the purchaser
3.7.1
joint welding
production welding used to assemble components together to obtain an integral unit
3.7.2
finishing welding
production welding carried out in order to ensure the agreed quality of the casting
BS EN 12680-2:2003 – Founding — Ultrasonic examination — Part 2: Steel castings for highly stressed components