Română
Русский
Pack-off Flanges
Destination:
Pack-off flanges are usually used as a cross-over connection to adapt flanges of different pressure ratings or sizes and provide an extra safety seal of the casing.
There are pack-off flanges provided with one seal, recommended for pressures up to 5,000 PSI (350 bar) and pack-off flanges with two seals, recommended for pressures up to 15,000 PSI (1050 bar).
About Material class and Temperature classification, see Appendix A.
The type of Pack-off flange depends on the seal used in it.
Pack-off flanges with one seal
| Bottom flange, (in x psi) |
Top flange, (in x psi) |
Casing pack-off size, ( in ) |
Height, ( in ) |
| 9″ x 2,000 | 9″ x 3,000 | 4 1/2″ | 4 1/2″ |
| 9″ x 2,000 | 9″ x 3,000 | 5 1/2″ | 4 1/2″ |
| 11″ x 2,000 | 11″ x 3,000 | 5 1/2″ | 4 1/2″ |
| 11″ x 2,000 | 11″ x 3,000 | 7″ | 4 1/2″ |
| 11″ x 3,000 | 7 1/16″ x 5,000 | 7″ | 5″ |
| 11″ x 3,000 | 11″ x 3,000 | 5 1/2″ | 3 3/8″ |
| 11″ x 3,000 | 11″ x 5,000 | 7 5/8″ | 5 11/16″ |
| 11″ x 5,000 | 11″ x 5,000 | 5 1/2″ | 4 13/16″ |
| 11″ x 5,000 | 11″ x 5,000 | 7″ | 4 13/16″ |
| 13 5/8 x 3,000 | 11″ x 5,000 | 8 5/8″ | 5 11/16″ |
| 13 5/8 x 3,000 | 13 5/8″ x 5,000 | 9 5/8″ | 5 1/2″ |
| 13 5/8″ x 5,000 | 11″ x 5,000 | 7″ | 6 13/32″ |
| 13 5/8″ x 5,000 | 13 5/8″ x 5,000 | 9 5/8″ | 4 9/16″ |
| 16 3/4″ x 3,000 | 11″ x 5,000 | 10 3/4″ | 5 5/8″ |
Pack-off with two seals
| Bottom flange, (in x psi) |
Top flange, (in x psi) |
Casing pack-off size, ( in ) |
Height, ( in ) |
| 11″ x 5,000 | 9″ x 10,000 | 7 5/8″ | 4 7/8″ |
| 11″ x 5,000 | 7 1/16″ x 10,000 | 5 1/2″ | 4 7/8″ |
| 11″ x 5,000 | 9″ x 10,000 | 7 3/4″ | 4 7/8″ |
| 11″ x 5,000 | 7 1/16″ x 10,000 | 7″ | 4 7/8″ |
| 11″ x 5,000 | 11″ x 10,000 | 7″ | 5 11/16″ |
| 11″ x 5,000 | 9″ x 10,000 | 7″ | 6″ |
| 11″ x 10,000 | 7 1/16″ x 10,000 | 7″ | 6″ |
| 11″ x 10,000 | 9″ x 10,000 | 7 5/8″ | 6″ |
| 11″ x 10,000 | 9″ x 10,000 | 7″ | 6″ |
| 13 5/8″ x 3,000 | 11″ x 10,000 | 9 5/8″ | 6″ |
| 13 5/8 x 5,000 | 13 5/8″ x 10,000 | 9 5/8″ | 7 1/2″ |
| 13 5/8″ x 5,000 | 11″ x 5,000 | 7 5/8″ | 6 13/32″ |
| 13 5/8″ x 5,000 | 11″ x 5,000 | 7″ | 6 13/32″ |
| 13 5/8″ x 5,000 | 11″ x 5,000 | 8 5/8″ | 6 13/32″ |
| 13 5/8″ x 5,000 | 11″ x 10,000 | 7″ | 7″ |
| 16 3/4″ x 5,000 | 16 3/4″ x 5,000 | 11 3/4″ | 5 1/4″ |
| 16 3/4″ x 5,000 | 13 5/8″ x 10,000 | 11 3/4″ | 5 1/4″ |
| 16 3/4″ x 5,000 | 13 5/8″ x 10,000 | 10 3/4″ | 5 1/4″ |