Reference Radiographs are nondestructive testing standards universally accepted because of their high reliability in accept-reject actions.
These reference radiographs for heavy-walled steel castings are applicable to nominal section thicknesses of 2 to 4-1/2 in. ( 51 to 114 mm) and consist of three separate sets as follows:
RRE018601 (Volume I): 1-MV X Rays and Iridium 192 (called " 1 to 2-Mev X rays" previously) Set of 28 plates, 5 by 8 in. ( 127 by 203 mm) in a 15 by 17- in. ( 381 by 432-mm) ring binder.
Adjunct to E186 Volume I -- Reference Radiographs for Heavy-Walled (2 to 4 1/2-in. (51 to 114-mm)) Steel Castings