ISO 22825-2012 pdf free.Non-destructive testing of welds – Ultrasonic testing – – Testing of welds in austenitic steels and nickel-based alloys.
ISO 22825 specifies the approach to be followed when developing procedures for the ultrasonic
testing of the following welds:
— welds in stainless steels;
— welds in nickel-based alloys;
— welds in duplex steels;
— dissimilar metal welds;
— austenitic welds.
The purposes of the testing can be very different, e.g.:
— for the assessment of quality level (manufacturing);
— for the detection of specific indications induced in service.
Acceptance levels are not included in this International Standard, but can be applied in accordance with the scope of the testing (see Clause 5).
The requirements of this International Standard are applicable to both manual and mechanized testing.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5577, Non-destructive testing — Ultrasonic inspection — Vocabulary
ISO 7963, Non-destructive testing — Ultrasonic testing — Specification for calibration block No. 2
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel
ISO 17635, Non-destructive testing of welds — General rules for metallic materials
ISO 17640, Non-destructive testing of welds — Ultrasonic testing — Techniques, testing levels, and assessment
EN 473, Non-destructive testing — Qualification and certification of NOT personnel — General principles
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
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5577, Iso 17635 and the following apply.
dual-element probe
ultrasonic probe in which the transmit and receive transducers are separate and are electrically and acoustically isolated from each other
3.2 focal distance
(dual element probes distance between probe and focal point on the acoustical axis where the acoustic pressure is at its maximum
3.3 focal curve
(dual element probes’ curve, representing the relationship between sound path and sensitivity of a probe on a specified material containing specified reflectors
4 Information required prior to testing
4.1 Items to be defined by specification
Information on the following items is required:
a) material type and grade:
b) purpose and extent ot testing, including testing for transverse indications, it required:
c) testing levels (see Clause 10);
d) manufacturing or operation stage at which the testing shall be carried out;
e) requirements for access, the surface condition (see 11.2) and temperature;
f) whether or not parent metal testing shall be carried out prior to and/or after welding (see 11.3);
g) reference blocks (see Clauses 6 and 7);
h) personnel qualifications (see Clause 5);
i) reporting requirements (see Clause 12);
j) acceptance criteria and/or recording level.ISO 22825 pdf download.