DIN EN () Founding – Ultrasonic examination – Part 2: Steel castings for highly stressed components. Hello. The scope of this standard is for highly stressed components. Where is the limit? When can I know if one material is higly stressed or not. Licens k?bt af: Vesta Wind System A/S Dansk standard DS/EN 1. udgave St?bning – Ultralydunders?gelse – Del 2.
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For greater wall thicknesses, special agreements apply with respect to test procedure and recording levels. Students Click Here Join Us! 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 mm. When determining the transfer correction, consideration shall be given 1268-2 only to the quality of the coupling surface but also to that of the opposite surface because the opposite surface also influences the height of the backwall echo used for calibration.
The height of the echo indication is given as flat-bottomed or side-drilled hole diameter. ENNon-destructive testing — Ultrasonic examination — Part 2: This investigation can be achieved by altering the ultrasonic test technique e.
Steel castings for highly stressed components Fonderie – Contr?
NOTE It is recommended that the sensitivity setting of angle-beam probes is verified on real not artificial planar discontinuities cracks with dimensions in through-wall direction or on walls perpendicular to the surface and infinite to the sound beam.
Already Subscribed to this document. Unless otherwise agreed by the time of enquiry and order, when, after conducting the radiographic and the ultrasonic examination in combination, it has been demonstrated that a discontinuity is situated in the core zone, this additional information shall make the discontinuity acceptable at one level less severe, e.
If the opposite surface is machined or complies at least to the limit comparator 4 S1 or 4 S2 according to ENthis surface has a quality which is sufficient for transfer correction measurements.
Please first verify your email before subscribing to alerts. For wall thicknesses greater than mm, agreement shall be made between the parties concerned on the test procedure and also on the recording and acceptance levels. In this case, the flat-bottomed or side-drilled hole diameter which can be detected with a signal-noise ratio of at least 6 dB shall be noted in the test report and the additional procedure shall be agreed between the manufacturer and the purchaser.
The sizing of small planar discontinuities, as given in Figure 2, becomes more difficult with increasing beam-path length and sound-beam diameter. In these circumstances, the probe shoe should be contured to fit the casting shape see EN These sections relate to the sizes of castings ready for assembly finish machined.
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EN – NDT Ultrasonic examination. Founding – Material engineering other topics – Eng-Tips
Spheroidal graphite cast iron castings. ENNon-destructive testing — Characterization and verification of ultrasonic examination equipment — Part 1: The characterization of the type of discontinuities can be improved by sn additional sound directions and angles of incidence.
Individual indication smainly in the same position in through-wall direction. E information is available as follows: Distance gain size technique DGS The distance gain size technique makes use of a series of theoretically derived curves which link the soundbeam path, the apparatus gain and the diameter of a disc-shaped reflector which is perpendicular to the beam axis.
Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Severity levela Smallest equivalent flat-bottomed or side-drilled hole diameter to be considered distance min.
NOTE 1 Annex B gives information on sound-beam diameters in order to distinguish between discontinuities with or without measurable dimensions.
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Download Now White Paper: For an area with measurable length and non-measurable dimension in through-wall direction, this non-measurable dimension shall be taken as 3 mm and the area be calculated: This is one of three European Standards for ultrasonic examination. By joining you are opting in to receive e-mail. We have no document history for this standard. This European Standard does not apply to austenitic steels and joint welds. It makes the use of probes with focussed beams such as twin-crystal probes necessary.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. When using transverse wave probes, irrespective of amplitude, all indications which display travelling characteristics or have an apparent dimension in through-wall direction shall be recorded for subsequent assessment according to 5.
ENNon-destructive testing — Ultrasonic examination — Part 1: Download Now Defense manufacturing is all about project manufacturing and project accounting. 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 assessment shall be carried out on selected casting areas which are representative of the surface finish and of the total thickness range. Are you an Engineering professional?
BS EN 12680-2:2003
The sn distance between indications as criterion for evaluation as an individual indication or indication area in through-wall direction or lateral to the surface, shall be enn mm. During probe movement the sound paths change, but all indications remain without measurable dimensions. If possible, the areas to be tested shall be examined from both sides.
All echo indications from discontinuities with measurable dimensions shall be recorded, when the signal amplitude exceeds both the levels given in Table 3 and the criteria given in Figures 3 and 4.
As the voice of the U. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter.