ISO 5948:1994 pdf download – Railway rolling stock material – Ultrasonic acceptance testing
1 Scope
This International Standard specifies the testing con- ditions and the acceptance standard for ultrasonic ac- ceptance tests for the components and types of tests covered in table 1, columns 1 to 6. Unless otherwise agreed, this International Standard shall be applied when the product standards require mandatory ultrasonic tests or when the ordered op- tional tests are made mandatory (see IS0 1005-1, IS0 1005-3 and IS0 1005-6). NOTE 1 Following the revision of IS0 1005-6, ultrasonic acceptance tests are mandatory for all wheels of testing category B, but optional for all wheels of testing category A. According to IS0 1005-I and IS0 1005-3, ultrasonic ac- ceptance tests on tyres and axles are optional in every case.
3.3 If the order does not specify the details given in 3.2, the manufacturer may assume that the type of test indicated with an “m” in table 1, column 2, shall be carried out, and that the normal testing conditions and acceptance standards specified in this Inter- national Standard shall apply.
4 Location of testing and qualifications of the personnel
When ultrasonic tests are specified for the accept- ance of the products, these shall be carried out at the manufacturer’s works by competent staff and, if so requested, in the presence of the purchaser’s rep- resentative.
6 Surface condition of the products
6.1 Unless otherwise agreed, independent of the surface condition in which the product is to be deliv- ered, ultrasonic testing may be carried out either in the unmachined or machined condition, provided the requirements of 6.2 to 6.4 are observed.
6.2 The surface condition of both the testing reflecting surfaces of the products shall be such there is no interference with the test. that and that
6.3 When ultrasonic acceptance tests are carried out on products in the unmachined condition, any scale shall tightly adhere to the metallic surface and shall be sufficiently smooth to meet the conditions of 6.2.
6.4 When products to be ultrasonically tested are machined before testing, the operation shall ensure that a surface finish suitable for ultrasonic testing is achieved.
9.1 General
The setting of the sensitivity of the instrument shall be carried out under the same conditions (see 7.2 and clause 8) as the tests themselves. In the case of discontinuity-detection tests, in each case the sensitivity shall be set so that, within the area to be scanned outside the “dead zone” (see note 2 to table 11, a reference reflector with a diameter specified as acceptance standard in clause 12 can, irrespective of its distance from the surface to be scanned, be detected positively. NOTE 3 Calibration blocks applied for establishing the DGS diagrams or for setting the sensitivity according to 9.2, 9.3 or 9.4 shall have an acoustic attenuation similar to that of the wheels or tyres to be tested.