Flange type bellows expansion joint is a flexible connector designed to absorb thermal expansion, vibrations, and misalignment in piping systems. It features metal bellows, typically made from stainless steel, and flanges on both ends for secure attachment to the piping system.
| Nominal diameter |
Wave number |
Pressure rating(MPa) | Length | ||||
| 0.6 | 1.0 | 1.6 | Flange (mm) |
Take over | |||
| mm | Inch | Axial Compenstion(mm),Rigidity(N/mm) | |||||
| 32 | 1¼ | 8 | 22/26 | 20/26 | 18/63 | 160/250 | 264/280 |
| 32 | 1¼ | 16 | 46/14 | 41/14 | 36/32 | 224/291 | 316/321 |
| 40 | 1½ | 8 | 22/44 | 20/44 | 18/89 | 164/259 | 269/289 |
| 40 | 1½ | 16 | 46/22 | 41/22 | 36/45 | 230/304 | 319/334 |
| 50 | 2 | 8 | 22/51 | 20/70 | 18/70 | 172/276 | 282/306 |
| 50 | 2 | 16 | 46/26 | 41/22 | 36/35 | 204/342 | 347/372 |
| 65 | 2½ | 8 | 30/35 | 20/70 | 22/55 | 215/294 | 300/322 |
| 65 | 2½ | 12 | 38/22 | 41/35 | 34/40 | 260/334 | 340/362 |
| 80 | 3 | 8 | 36/26 | 26/44 | 28/41 | 240/338 | 344/366 |
| 80 | 3 | 10 | 49/17 | 38/32 | 43/26 | 270/368 | 323/345 |
| 100 | 4 | 6 | 45/60 | 34/33 | 35/93 | 235/317 | 374/390 |
| 100 | 4 | 10 | 74/32 | 49/21 | 57/50 | 305/381 | 387/409 |
| 125 | 5 | 5 | 42/47 | 40/75 | 34/74 | 282/314 | 316/342 |
| 125 | 5 | 9 | 77/29 | 64/40 | 58/45 | 382/386 | 388/414 |
| 150 | 6 | 5 | 44/50 | 38/59 | 34/78 | 282/339 | 338/367 |
| 150 | 6 | 8 | 71/43 | 66/36 | 54/59 | 356/399 | 402/427 |
| 200 | 8 | 4 | 46/55 | 40/62 | 38/78 | 280/348 | 348/372 |
| 200 | 8 | 6 | 65/44 | 64/51 | 53/58 | 340/402 | 402/426 |
| 250 | 10 | 4 | 65/34 | 42/68 | 52/45 | 315/379 | 415/379 |
| 250 | 10 | 6 | 97/21 | 59/52 | 79/39 | 393/459 | 493/399 |
| 300 | 12 | 4 | 65/62 | 59/42 | 52/65 | 366/427 | 466/467 |
| 300 | 12 | 6 | 97/41 | 87/35 | 79/41 | 464/525 | 564/565 |
| 350 | 14 | 4 | 65/58 | 59/59 | 52/74 | 397/452 | 497/492 |
| 350 | 14 | 6 | 97/39 | 87/37 | 79/48 | 509/564 | 609/604 |
| 400 | 16 | 4 | 97/35 | 59/67 | 52/68 | 412/478 | 512/518 |
| 400 | 16 | 6 | 145/22 | 87/44 | 79/47 | 522/588 | 622/628 |
| 450 | 18 | 4 | 97/64 | 59/62 | 79/41 | 403/498 | 503/523 |
| 450 | 18 | 6 | 145/37 | 87/43 | 118/25 | 503/658 | 603/648 |
| 500 | 20 | 4 | 97/80 | 87/37 | 79/75 | 431/523 | 531/544 |
| 500 | 20 | 6 | 145/37 | 131/39 | 118/43 | 531/665 | 631/742 |
| 600 | 24 | 4 | 97/80 | 87/85 | 79/94 | 478/548 | 578/588 |
| 600 | 24 | 6 | 145/45 | 131/49 | 118/53 | 658/579 | 758/781 |
| 700 | 28 | 4 | 97/72 | 87/77 | 79/85 | 490 | 590 |
| 700 | 28 | 6 | 145/45 | 131/49 | 118/53 | 690 | 790 |
| 800 | 32 | 4 | 108/95 | 102/102 | 94/112 | 502 | 602 |
1.Flexibility: The bellows design allows for significant axial, lateral, and angular movements, making it suitable for accommodating thermal expansion and vibration.
2.Flanged Connections: The flanges on both ends enable easy installation and secure attachment to existing piping, providing a leak-proof seal.
3.Durability: Made from high-quality metals, flange type bellows expansion joints are resistant to high temperatures, pressures, and corrosive environments, ensuring long-term reliability.
4.Vibration Isolation: These joints effectively isolate vibrations, reducing noise and protecting connected equipment from mechanical stress.
Flange type bellows expansion joints are commonly used in various industries, including:
Power Generation: Used in steam and gas piping systems to accommodate thermal expansion and prevent system failure.
Chemical Processing: Employed in pipelines carrying corrosive fluids, where flexibility and resistance to harsh conditions are essential.
Oil and Gas: Used in extraction and refining processes to manage thermal movements and vibrations in pipelines.
HVAC Systems: Implemented in heating, ventilation, and air conditioning systems to allow for movement while maintaining a secure connection.
Overall, flange type bellows expansion joints play a crucial role in maintaining the integrity and functionality of piping systems by managing movement and reducing stress on connected components.
