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DD CEN/TS 14751:2004

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Welding. Use of time-of-flight diffraction technique (TOFD) for examination of welds
Available format(s)

Hardcopy , PDF

Superseded date

30-09-2011

Language(s)

English

Published date

24-11-2004

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General remarks on the capabilities of the technique
5 Examination levels
6 Information required prior to testing
   6.1 Items to be defined by specification
   6.2 Specific information required by the operator
        before testing
   6.3 Written test instruction
7 Requirements for personnel and equipment
   7.1 Personnel qualifications
   7.2 Equipment
        7.2.1 Ultrasonic equipment and display
        7.2.2 Ultrasonic probes
        7.2.3 Scanning mechanisms
8 Preparation for testing
   8.1 Volume to be inspected
   8.2 Set up of probes
   8.3 Scan increment setting
   8.4 Geometry considerations
   8.5 Preparation of scanning surfaces
   8.6 Temperature
   8.7 Couplant
   8.8 Provision of datum points
9 Testing of base material
10 Range and sensitivity settings
   10.1 Settings
        10.1.1 General
        10.1.2 Time window
        10.1.3 Time-to-depth conversion
        10.1.4 Sensitivity settings
   10.2 Checking of the settings
   10.3 Reference blocks
        10.3.1 General
        10.3.2 Material
        10.3.3 Dimensions and shape
        10.3.4 Reference reflectors
11 Weld testing
12 Interpretation and analysis of TOFD images
   12.1 General
   12.2 Assessing the quality of the TOFD image
   12.3 Identification of relevant indications
   12.4 Classification of relevant indications
        12.4.1 General
        12.4.2 Indications from surface breaking
               discontinuities
        12.4.3 Indications from embedded discontinuities
        12.4.4 Unclassified indications
   12.5 Determination of location and size
        12.5.1 Location
        12.5.2 Sizing
   12.6 Evaluation against acceptance criteria
13 Test report
   13.1 General
   13.2 Information relating to object under test
   13.3 Information relating to equipment
   13.4 Information relating to test technique
   13.5 Information relating to test results
Annex A (informative) Reference blocks
   A.1 Thickness requirements
        A.1.1 Maximum thickness
        A.1.2 Minimum thickness
   A.2 Reference reflectors
   A.3 Typical reference blocks
Annex B (informative) Examples of typical scans
   B.1 Satisfactory and unsatisfactory TOFD-images
   B.2 Typical TOFD-images of discontinuities in fusion
        welded joints
   B.3 TOFD-images of geometrical features
Bibliography

Describes the application of the time-of-flight diffraction (TOFD) technique for the semi-, or fully- automated ultrasonic testing of fusion welded joints in metallic materials equal to and above 6 mm thickness.

Committee
WEE/46
DocumentType
Standard
Pages
38
PublisherName
British Standards Institution
RevisionOf
Status
Superseded
SupersededBy

Standards Relationship
CEN/TS 14751:2004 Identical

EN 12668-2:2010 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 2: Probes
BS 7706:1993 Guide to calibration and setting-up of the ultrasonic time of flight diffraction (TOFD) technique for the detection, location and sizing of flaws
EN 1714:1997/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - ULTRASONIC TESTING OF WELDED JOINTS
EN 1330-4:2010 Non-destructive testing - Terminology - Part 4: Terms used in ultrasonic testing
EN 12668-1:2010 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 1: Instruments
EN 473:2008 Non-destructive testing - Qualification and certification of NDT personnel - General principles
EN 583-1:1998/A1:2003 NON-DESTRUCTIVE TESTING - ULTRASONIC EXAMINATION - GENERAL PRINCIPLES
EN 12062:1997/A2:2003 NON-DESTRUCTIVE EXAMINATION OF WELDS - GENERAL RULES FOR METALLIC MATERIALS
ENV 583-6 : DRAFT 2000 NON-DESTRUCTIVE TESTING - ULTRASONIC EXAMINATION - PART 6 - TIME-OF FLIGHT DIFFRACTION TECHNIQUE AS A METHOD FOR DETECTION AND SIZING OF DISCONTINUITIES
EN 12668-3:2013 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 3: Combined equipment

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