| CLASS | SIZE RANGE | MATERIAL |
| CL.150 | 12” TO 72” | F6A CL.2, F6A CL.3, 316, 321, 347, 304, F44, F53, F60, 17-4PH, XM19, INCONEL , MONEL and other Special grade materials. |
| CL.300 | 12” TO 64” | |
| CL.600 | 10” TO 48” | |
| CL.900 | 6” TO 36” | |
| CL.1500 | 4” TO 30” | |
| CL.2500 | 4” TO 24” | |
| CL.3500 | 4” TO 24” |
