TBA - NAVSEA TECHNICAL PUBLICATION

T9074-AS-GIB-010/271 Rev 1

7.3 EDDY CURRENT INSPECTION REQUIREMENTS..............................................................................................7-1 7.3.1 General Requirements.......................................................................................................................................7-1 7.3.1.1 Method. .......................................................................................................................................................7-1 7.3.1.2 Surface Finish. ............................................................................................................................................7-1 7.3.2 Procedure. .........................................................................................................................................................7-1 7.3.3 Records. ............................................................................................................................................................7-2 7.4 EQUIPMENT REQUIREMENTS. ............................................................................................................................7-2 7.4.1 Eddy Current Instrument...................................................................................................................................7-2 7.4.2 Performance Verification Reference Block. .....................................................................................................7-2 7.5 STANDARDIZATION...............................................................................................................................................7-2 7.5.1 Painted/Coated Surfaces. ..................................................................................................................................7-2 7.6 TEST TECHNIQUE. ..................................................................................................................................................7-3 7.6.1 Toe of Weld Scan. ............................................................................................................................................7-3 7.6.2 Weld and HAZ Scan. ........................................................................................................................................7-3 7.6.3 Inspection of Surfaces Other Than Welds. .......................................................................................................7-3 7.6.4 Indexing. ...........................................................................................................................................................7-3 7.7 EVALUATION OF TEST RESULTS........................................................................................................................7-3 CHAPTER 8 VISUAL TESTING...........................................................................................................................................8-1 8.1 INTENDED USE........................................................................................................................................................8-1 8.2 DEFINITIONS. ..........................................................................................................................................................8-1 8.3 REFERENCE STANDARD. ......................................................................................................................................8-1 8.4 PROCEDURE REQUIREMENTS. ............................................................................................................................8-1 8.5 RECORDS. .................................................................................................................................................................8-1 8.6 INSPECTION TECHNIQUES. ..................................................................................................................................8-2 8.7 DIMENSIONAL INSPECTION ACCURACY..........................................................................................................8-2 8.8 LIGHTING. ................................................................................................................................................................8-2 CHAPTER 9 NOTES ..............................................................................................................................................................9-1 9.1 SUPERSEDURE INFORMATION............................................................................................................................9-1 APPENDIX A COMPUTED RADIOGRAPHY REQUIREMENTS FOR THE DETECTION AND MEASUREMENT OF PIPE CORROSION AND EROSION.......................................................................A-1 A.1 SCOPE. .....................................................................................................................................................................A-1 A.1.1 Supplemental Requirements............................................................................................................................A-1 A.1.2 CR Guidance/Tutorial/Definitions. .................................................................................................................A-1 A.1.3 CR Limitations. ...............................................................................................................................................A-1 A.2 INSPECTION PROCEDURE...................................................................................................................................A-1 A.2.1 Procedure Qualification. .................................................................................................................................A-2 A.2.2 Procedure Approval. .......................................................................................................................................A-2 A.3 COMPUTED RADIOGRAPHY EQUIPMENT.......................................................................................................A-2 A.4 COMPUTED RADIOGRAPHY PERSONNEL REQUIREMENTS. ......................................................................A-2 A.5 COMPUTED RADIOGRAPHY TECHNIQUE REQUIREMENTS. ......................................................................A-2 A.5.1 Reference Standards........................................................................................................................................A-2 A.5.2 Reference Standard Location. .........................................................................................................................A-3 A.5.4 Source/Imaging Plate Alignment. ...................................................................................................................A-3 A.5.5 Radiographic Contrast. ...................................................................................................................................A-3 A.5.6 Exposure/Pixel Value......................................................................................................................................A-4 A.6 INADVERTENT RADIOGRAPHY........................................................................................................................A-4 A.7 RECORDS. ...............................................................................................................................................................A-4

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