Adaptor backing flanges are used to couple a glass end to the flange having a different bolt configuration. These flanges are made of cast iron and are supplied with inserts.
These are particularly used to fit glass equipment on non-glass equipment like Glass-lined reactors etc.
Adaptor backing flanges are generally supplied undrilled. However, if specified, these can be supplied drilled as per “Table E”, “Table F” and “ASA150” standards.
ADAPTOR BACKING FLANGES TABLE
| Undrilled flanges | Drilled to Table E | |||||||
| Cat.Ref. | DN | D | D1 | D2 | L | Cat.Ref. | pcd | n x dØ |
| CFA1 | 25 | 115 | 43 | 51 | 10 | CFA1/E1 | 82 | 4 x 12Ø |
| CFA1.5 | 40 | 150 | 58 | 66 | 10 | BFA1.5/E | 98 | 4 x 16Ø |
| CFA2* | 50 | 165 | 70 | 81 | 12 | CFA2/E | 114 | 4 x 16Ø |
| CFA3* | 80 | 200 | 101 | 112 | 12 | CFA3/E | 146 | 4 x 16Ø |
| CFA4* | 100 | 220 | 134 | 148 | 12 | CFA4/E | 178 | 8 x 16Ø |
| CFA6* | 150 | 285 | 186 | 196 | 15 | CFA6/E | 235 | 8 x 19Ø |
| CFA9* | 225 | 395 | 260 | 282 | 15 | CFA9/E | 324 | 12 x 19Ø |
| CFA12/E | 300 | 445 | 342 | 363 | 18 | CFA12/A | 406 | 12 x 23Ø |
| Drilled to Table F | Drilled to ASA 150 | ||||
| Cat.Ref. | pcd | n x dØ | Cat.Ref. | pcd | n x dØ |
| CFA1/F | 87 | 4 x 16Ø | CFA1/A | 79 | 4 x 16Ø |
| CFA1.5/F | 105 | 4 x 16Ø | CFA1.5/A | 98 | 4 x 16Ø |
| CFA2/F | 127 | 4 x 16Ø | CFA2/A | 121 | 4 x 19Ø |
| CFA3/F | 165 | 8 x 16Ø | CFA3/A | 152 | 4 x 16Ø |
| CFA4/F | 190 | 8 x 16Ø | CFA4/A | 190 | 8 x 16Ø |
| CFA6/F | 260 | 12 x 19Ø | CFA6/A | 241 | 8 x 19Ø |
| CFA9/F | 356 | 12 x 230 | CFA9/A | 298 | 8 x 19Ø |
| CFA12/F | 438 | 16 x 23Ø | CFA12/A | 432 | 12 x 23Ø |