T9074-AS-GIB-010/271 Rev 1
Table 3-5. Definition of Radiographic Quality Levels.
Equivalent Penetrameter Sensitivity 3/ (Percent)
Radiographic Quality Level
Max Penetrameter Thickness 1/ (Percent)
Min Perceptible Hole Diameter 2/
1-1T 1-2T 2-1T 2-2T 2-4T 4-2T
1 1 2 2 2 4
1T 2T 1T 2T 4T 2T
0.7 1.0 1.4 2.0 2.8 4.0
NOTES: 1/
Expressed as a percentage of the material thickness. Expressed as a multiple of thickness of penetrameter (T).
2/
3/ Equivalent penetrameter sensitivity is that thickness of the penetrameter, expressed as a percentage of the material thickness, in which a 2T hole would be visible under the radiographic conditions.
3.9 RADIOGRAPHY OF REPAIR WELDS. When weld repairs are made to castings and forgings, to remove defects revealed by radiography, the original radiographs of the previously defective areas shall be submitted for review with the final acceptance radiographs. For those items where radiography is required for the repair, a sketch showing the location, size, and shape of the repair weld shall accompany the radiograph. Penetrameters, location markers, or film identification shall not be placed in the weld repair areas being inspected. 3.10 RADIOGRAPHY OF CASTINGS AND FORGINGS. Whenever possible a single-wall technique shall be used; however, for casting and forging areas with nominal internal dimensions 4 inches or less a double-wall technique may be used. The minimum source-to-film distance shall be calculated using the outside diameter of the item radiographed as specimen thickness T s . 3.11 RADIOGRAPHIC FILM OWNERSHIP. Unless otherwise specified, radiographic film and the associated inspection records of an item shall become the property of the purchaser of the item. Maintenance of radiographic records shall be as specified in 1.8.4.
3-16
Made with FlippingBook - Share PDF online