T9074-AS-GIB-010/271 Rev 1
6.6.4.2.4.2 Detection of Lack of Penetration in Full Penetration Tee Welds....................................................6-9 6.6.4.3 Specific Requirements for Butt and Corner Welds and the Volumetric Inspection of Tee Welds. ............6-9 6.6.4.3.1 Instrument. ............................................................................................................................................ 6-9 6.6.4.3.2 Transducers........................................................................................................................................... 6-9 6.6.4.3.2.1 Size. ................................................................................................................................................ 6-9 6.6.4.3.2.2 Frequency. ...................................................................................................................................... 6-9 6.6.4.3.2.3 Angle............................................................................................................................................... 6-9 6.6.4.3.3 Calibration. ........................................................................................................................................... 6-9 6.6.4.3.3.1 Class I Welds. ................................................................................................................................. 6-9 6.6.4.3.3.2 Class II and III Welds. .................................................................................................................... 6-9 6.6.4.3.4 Procedure. ........................................................................................................................................... 6-10 6.6.4.3.4.1 Longitudinal Discontinuities. ........................................................................................................6-10 6.6.4.3.4.1.1 One Directional Coverage.......................................................................................................6-10 6.6.4.3.4.2 Transverse Discontinuities. ...........................................................................................................6-10 6.6.4.3.4.2.1 Butt and Corner Welds Ground Flush. ....................................................................................6-10 6.6.4.3.4.2.2 Butt and Corner Welds Not Ground Flush. .............................................................................6-10 6.6.4.3.4.2.3 Tee Welds Inspected from the Through Member Surface Opposite the Attached Member (Required Method When Accessible). ....................................................................................6-10 6.6.4.3.4.2.4 Tee Welds Inspected from the Attached Member. ..................................................................6-10 6.6.4.3.4.3 Discontinuity Evaluation............................................................................................................... 6-10 6.6.4.3.5 Transverse Discontinuities (Special Case)..........................................................................................6-11 6.6.4.4 Specific Requirements for Tee Welds that Are Not Volumetrically Inspected. .......................................6-11 6.6.4.4.1 Detection of Lack of Penetration in Full Penetration Tee Welds........................................................6-11 6.6.4.4.1.1 Search Units. ................................................................................................................................. 6-11 6.6.4.4.1.2 Calibration. ................................................................................................................................... 6-11 6.6.4.4.1.3 Procedure. ..................................................................................................................................... 6-11 6.6.4.4.2 Detection of Discontinuities into the Through Member. ....................................................................6-11 6.6.4.4.2.1 Inspection Zone............................................................................................................................. 6-12 6.6.4.4.2.2 Search Units. ................................................................................................................................. 6-12 6.6.4.4.2.3 Calibration. ................................................................................................................................... 6-12 6.6.4.4.2.4 Procedure. ..................................................................................................................................... 6-12 6.6.4.5 Record of Inspection Results. ...................................................................................................................6-13 6.7 THICKNESS MEASUREMENTS...........................................................................................................................6-13 6.7.1 Scope. ............................................................................................................................................................. 6-13 6.7.2 Calibration. ..................................................................................................................................................... 6-13 6.7.3 Painted/Coated Surfaces. ................................................................................................................................ 6-13 6.7.4 Method. .......................................................................................................................................................... 6-13 6.8 BOND TESTING OF WELD DEPOSITED MATERIALS. ...................................................................................6-13 6.8.1 Scope. ............................................................................................................................................................. 6-13 6.8.1.1 Method. ....................................................................................................................................................... 6-13 6.8.2 Transducers. ................................................................................................................................................... 6-14 6.8.3 Calibration of Test Equipment. ......................................................................................................................6-14 6.8.4 Scanning. ........................................................................................................................................................ 6-14 6.8.4.1 Continuous Scanning. ............................................................................................................................... 6-14 6.8.4.2 Intermittent Scanning................................................................................................................................ 6-14 6.8.4.3 Calibration for Ultrasonic Testing of Nonparallel Surfaces. ....................................................................6-14 6.8.4.4 Continuous Scanning of Nonparallel Surfaces. ........................................................................................6-15 6.8.5 Marking. ......................................................................................................................................................... 6-15 6.8.6 Flaw Plotting. ................................................................................................................................................. 6-15 CHAPTER 7 EDDY CURRENT TESTING ..........................................................................................................................7-1 7.1 INTENDED USE. ...................................................................................................................................................... 7-1 7.2 DEFINITIONS. .......................................................................................................................................................... 7-1 7.2.1 Normalize/Normalization. ................................................................................................................................ 7-1
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