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:
RRE018603 (Volume III): 4-MV to 30-MV X Rays (called " 10 to 24 Mev X rays" previously). Set of 28 plates ( 5 by 8 in.) in a 15 by 17-in. ring binder.
Adjunct to E186 Volume III -- Reference Radiographs for Heavy-Walled (2 to 4 1/2-in. (51 to 114-mm)) Steel Castings