RT Exposure Time calculationThickness Factors AGFA film Factorsthick mm Inch T.F. Film Factor61/4 4 D !"F#R$%&A' 11/ ! D4 1"(i x 1""" 1)*/4 6 D! 6!Pipe calc ! 1 + D, 4"Detail No. unit value *1 1 1/4 11 D+ !Dia of pipe 6 inch 1!.4 *+ 1 1/ 1!4"-ch ,.144 1 */4 1Film D, 4" 4" !"+(uri 1! 1!"""!,1/4 *,6*1/ !+,"*/4 ,".4+ .,6 * ),+ * 1/4 1*6-FD' 6++ * 1/ 1+6Ff' 4")! * */4 +Tf' !1"1 4 *+-FD' specifi/ 0istance of source to film or 1o2Ff' A3fa film factor 4to 3i5e 5alue of the ta2le6Tf' Thickness factor-afe Distance (alculation(uri-FD x Ff x TfThickness of pipe(alculate formulacuriex 6(uri 4"safe 0istance 164.4*+4*+ m