Reference Radiographs are nondestructive testing standards universally accepted because of their high reliability in accept-reject actions.
Reference radiographs for examination of aluminum fusion welds
RRE1648-C01
RRE1648-C02
RRE1648-C03
RRE1648-C04
RRE1648-C05
RRE1648-C06
RRE1648-C07
RRE1648-F01
RRE1648-F02
RRE1648-R01
RRE1648-R02
RRE1648-R03
RRE1648-SN