Externally Pressurized Expansion Joints
The end bellows of this type externally pressurized expansion joint are connected with outer cylinder and inner cylinder respectively, and the convolution no.s of bellows are larger. externally pressurized can absorb large axial displacement under external pressure. During installation, the direction of inner sleeve should be consistent with the flow direction of the medium (flow direction mark on the expansion joint); After installation on the spot, the small ite rods must be removed; In order to reduce the force of the tube frame, this bellows expansion joints can be pre-distorted before installation(pre-pull, pre-press).
| |
External Pressurized Expansion Joint | Drawing |
NO | ITEMS | MATERIALS | NO
| ITEMS | MATERIALS |
1 | Short connection tube | Carbon steel | 7 | Bellow | SS304/SS316L/SS321 |
2 | Left ring plate | Carbon steel | 8 | Long connection tube | Carbon steel |
3 | Inner sleeve | SS304/Carbon steel | 9 | Middle connection tube | Carbon steel |
4 | Shell | Carbon steel | 10 | Right ring plate | Carbon steel |
5 | Guide ring plate | Carbon steel | 11 | Fixed plate | Carbon steel |
6 | Outer connection tube | Carbon steel | 12 | Flange | SS304/Carbon steel |
Technique Parameter of External Pressurized Expansion Joint
Normal Diameter | Length | Axial Movements | Axial Stiffness | Joint Size D X S | Radial Max. Size D1 | Working Pressure |
mm | mm | mm | N/mm | mm | mm | Mpa |
100 | 490~800 | 30~80 | 180~460 | Ø108X4 | 340 | 0.25~4.0 |
150 | 500~860 | 32~80 | 169~410 | Ø219X4.5 | 440 | 0.25~4.0 |
200 | 560~880 | 40~140 | 310~720 | Ø219X6 | 529 | 0.25~4.0 |
250 | 560~1090 | 48~146 | 389~862 | Ø273X8 | 570 | 0.25~4.0 |
300 | 720~1360 | 56~172 | 420~910 | Ø325X8 | 650 | 0.25~4.0 |
350 | 720~1360 | 60~172 | 463~1059 | Ø377X8 | 675 | 0.25~4.0 |
400 | 720~1360 | 60~172 | 637~1273 | Ø426X10 | 740 | 0.25~4.0 |
500 | 760~1360 | 72~168 | 799~1598 | Ø529X10 | 880 | 0.25~2.5 |
600 | 760~1510 | 72~168 | 1536~3568 | Ø630X10 | 1030 | 0.25~2.5 |
700 | 760~1510 | 76~180 | 1815~3630 | Ø720X10 | 1120 | 0.25~2.5 |
800 | 760~1510 | 76~180 | 1291~2583 | Ø820X12 | 1260 | 0.25~2.5 |
900 | 760~1510 | 76~180 | 1548~2809 | Ø920X12 | 1380 | 0.25~2.5 |
1000 | 760~1510 | 76~180 | 1573~2936 | Ø1020X12 | 1480 | 0.25~2.5 |
* They’re the regular sizes based on pressure of PN16 above, we can design and produce according to users’ detail required sizes and conditions.
