JF-250ST
Axial Expansion Joints
Axial Expansion Joints is a screw ends joints for pipe use.
Features
| JF-250 series (Screw Ends) Axial Expansion Joints |
|---|
| One-ply bellows welded to screw ends, with internal sleeve; tie-rods and external covers are optional. Axial Expansion Joints are designed to absorb axial movement of medium and/ or low pressure/ temperature pipeline. |
| Axial Expansion Joints – JF-250 series (Screw Ends) | |
|---|---|
| Size Range | DN15 ~ DN100 (1/2” ~ 4”) |
| Pressure/ Temperature rating | 10bars at 120℃ |
| Cycle Life | Nc ＞ 1,000 times |
Construction
| No. | Parts | 250ST | 250STC | 250STG | 250STGC | Standard Material | Optional Material |
|---|---|---|---|---|---|---|---|
| 1 | Bellows |  |
|
|
|
S.S.304 | S.S.316 |
| 2 | Internal Sleeve | |
|
|
|
S.S.304 | S.S.316 |
| 3 | Flange | |
|
|
|
Carbon Steel | S.S.304/ S.S.316 |
| 4 | Tie Rods | |
|
Carbon Steel | S.S.304/ S.S.316 | ||
| 5 | Lugs | |
|
Carbon Steel | S.S.304/ S.S.316 | ||
| 6 | External Covers | |
|
Carbon Steel | S.S.304/ S.S.316 |
Specification
| Size | OAL | Thickness of Weld Ends | Axial Movement | Axial Spring Rate | Effective Area | |||
|---|---|---|---|---|---|---|---|---|
| 250ST | 250STC | 250STG | ||||||
| mm | ins | mm | mm | mm | mm | mm | N/mm | cm2 |
| 15 | 1/2 | 250 | 300 | 350 | 2.8 | +10 -25 | 13 | 4 |
| 20 | 3/4 | 250 | 300 | 350 | 2.9 | +10 -25 | 19 | 6 |
| 25 | 1 | 250 | 300 | 350 | 3.2 | +10 -25 | 28 | 9 |
| 32 | 1 1/4 | 350 | 400 | 450 | 3.5 | +10 -40 | 18 | 13 |
| 40 | 1 1/2 | 350 | 400 | 450 | 3.5 | +10 -40 | 22 | 21 |
| 50 | 2 | 350 | 400 | 450 | 3.8 | +10 -40 | 29 | 32 |
| 65 | 2 1/2 | 350 | 400 | 450 | 4.2 | +10 -40 | 46 | 50 |
| 80 | 3 | 350 | 400 | 450 | 4.2 | +10 -40 | 53 | 67 |
| 100 | 4 | 350 | 400 | 450 | 4.5 | +10 -40 | 76 | 123 |
