The bellows is the fundamental part of the expansion joint, and it is obtained by hydraulic or mechanic trial from stainless steel or alloy steel having only one longitudinal welding. A controlled behaviour produces a set of parallel metallic waves, that ensure maximum flexibility and reliability..
Our system of calculation furnishes the stressanalysis of the bellows, which allows to make calculations according to customer's specifications.
| Expansion joint type | Connection material | Tie-rods material | Max temperature |
|---|---|---|---|
| Axial with flanges | Fe 410 B UNI 7746 Fe 42 B UNI 7070 Fe 44 B UNI 7070 |
343° C | |
| Fe 410.1 KW UNI 5869 ASTM A 105 |
454°C | ||
| Axial with welding ends | ASTM A 106 Gr.B | 454°C | |
| Hinged and Gimbal | ASTM A 106 Gr.B | Fe 37 B UNI 7070 Fe 42 B UNI 7070 Fe 44 B UNI 7070 |
343°C |
| Fe 410.1 KW UNI 5869 |
454°C |



