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BSI BS EN 1714 Document Information:
Title
Non-destructive testing of welds Ultrasonic testing of welded joints
Zerstoerungsfreie Pruefung von Schweissverbindungen. Ultraschallpruefung von Schweissverbindungen
Controle non destructif des assemblages soudes. Controle par ultrasons des assemblages soudes
British Standards Institution
Publication Date:
Jan 15, 1998
Scope:
This European Standard specifies methods for the manual ultrasonic testing of fusion welded joints in metallic materials equal to and above 8 mm thick which exhibit low ultrasonic attenuation (especially that due to scatter). It is primarily intended for use on full penetration welded joints where both the welded and parent material are ferritic.
The techniques may also be used:
— on materials other than those stated;
— on partial penetration welds;
— with automated equipment;
if required by specification.
Where material dependent ultrasonic values are specified in this standard they are based on steels having an ultrasonic sound velocity of 5920 ± 50 m/s for longitudinal waves, and 3255 ± 30 m/s for transverse waves. This is to be taken into account when testing materials with a different velocity.
The standard specifies four testing levels, each corresponding to a different probability of detection of imperfections. Guidance on the selection of testing levels A, B and C is given in Annex A. The requirements of the fourth testing level, which is intended for special applications, are in accordance with the general requirements of this standard and may only be used when defined by specification.
A1 This standard, may be used for the assessment of indications, for acceptance purposes, by either of the following methods:
1) evaluation based primarily on length and echo amplitude of the signal indication;
2) evaluation based on characterization and sizing of the indication by probe movement methods.
The methods used shall be specified.
Keywords:
- Non-destructive testing
- Ultrasonic testing
- Welded joints
- Joints
- Metals
- Welding
- Testing conditions
- Calibration
- Reflectance factor
- Attenuation
- Fusion welding
- Examination (quality assurance)
- Acceptance inspection
- Sensitivity
- Classification systems
- Flaws
- Defects
- Probes
- Scanners
- Size measurement
- Acceptance specification
- Fitness for purpose
- Surface texture
- Butt joints
- Corner joints
- T-joints
- Quality control
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