China supplier SS316 Flange Connection Ripple Compensator Coupling for Tube Big Size Telescopic Expansion Bellows Joint Flangeless with PTFE flange coupling

Product Description

SS316 Flange connection ripple compensator coupling for tube Big size telescopic expansion bellows joint flangeless with PTFE

Products Description

The single unrestrained metal expansion joint comes with 1 bellows section and end connections.It can be equipped with all kinds of connectors, such as pipe weld ends or flanges. This expansion joint is mainly intended to absorb movements of axial expansion, both thermal and mechanical. In addition, to a lesser extent, it can absorb angular and lateral movements. It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in piping systems that incorporate correctly designed anchors and pipe alignment guides.

Product Parameters

bellows compensation
stiffness max size of
radial direction
total length
product type
active area A
corrugation number
Yo (mm)
θ± (°)
axial direction
lateral direction
angular direction
Nm/ (°)
connection type
adapter pipe
corrugated compensator:design pressure Pd = 1.0Mpa(10Kgf/ cm2)fatigue life[ N ]=1000times design temperature t = 20ºC
40 38 4 5.5 1.2 4 282 1214 14 145 230 240 TB
8 1.1 5 8 141 135 6.5 300 310
50 56 4 7.5 1.5 4 388 1790 20 157 250 260
8 15 6.5 8 194 189 7 340 350
65 79 4 9 1.5 4 422 2109 24 186 250 260
8 18 6.5 8 211 217 9 360 370
80 138 4 11 2 3 658 2715 28 219 354 270
8 22 8 6 329 320 13 364 380
100 155 4 12 2.3 3 698 3226 30 283 284 300
8 24 9.1 6 349 403 15 364 380
150 300 4 11 1.5 3 1009 9571 84 289 284 300
8 22 6.1 6 504 1129 42 364 380
200 535 4 17 2.6 3 1493 1571 222 389 380 400
8 34 10 6 746 1324 111 500 520
250 779 4 16 2.1 3 1850 19116 400 443 3H0 400
8 33 8.3 6 925 2390 200 500 520
300 1075 4 21 2.8 3 1536 15211 459 495 426 450
8 42 11 6 768 1901 229 570 594
350 1269 4 21 5.9 3 1682 19653 593 577 426 450
8 42 12 6 841 2457 296 570 594
400 1619 4 20 22 2.6 1917 28582 862 626 426 450
  8 41 8.6 5 958 3573 431 570 594
450 2003 4 20 1.9 2.3 2148 39632 1195 678 426 450
8 40 7.7 4.6 1074 4954 598 570 594
500 2428 4 20 1.7 2 2380 53229 1605 729 426 450
8 40 6.9 4 1190 6654 803 570 594
600 3473 4 36 4.3 3 1561 17977 1506 830 576 600
8 71 17 6 781 2247 753 816 840


Technical Drawing


Packing and Shipping

Company Profile

 We supply innovative expansion joint solutions to meet the world’s pipe expansion needs. We’ve grown to serve customers in the electric power, oil and petrochemical, pulp and paper, industrial and heavy equipment suppliers and a variety of OEM markets. We manufacture metal bellows and fabric expansion joints from DN50 to 10000mm diameter with different temperature.The pressure ranges for these designs range from full vacuum to 120 MPa.


1. Q. Can I get the samples?
        A. Yes, small size sample is free, but buyer need pay for freight cost.
2. Q. What is Minimum Order Quantity?
        A.The MOQ is according to the type and size.
3. Q.Can you manufacture based on my drawing or specification?
        A.Yes, customized drawing or specification is available, just send us your requirements.
4. Q.What price terms do you accept?
        A.Ex factory price, FOB price. We’ll also be pleased to make CNF/CFR/CIF price for you.
5. Q.What standard can you make?
        A. EJMA, ASME, MIL-E, BS, JIS, CODAP, etc.

We need to know following information to quote you correct machineries:
1.Technical Drawing of the expansion joint you need?
2.What size you need?
3. Material of the bellows, pipe ends or flange?
4.What diameter of the expansion joint you need?
5.working pressure
7.Working temperature
9.Connection: Welding pipe ends or flange (ANSI, DIN, JIS,BS, AS,GOST, etc..)

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flange coupling

Flange Couplings in Corrosive or Harsh Environments

Flange couplings can be used in a wide range of environments, including corrosive or harsh conditions, depending on the material and coating used in their construction. The choice of material is a critical factor in determining the suitability of a flange coupling for such environments.


Stainless steel flange couplings are commonly used in corrosive environments due to their high resistance to rust and corrosion. Stainless steel contains chromium, which forms a protective oxide layer on the surface, preventing the underlying metal from being exposed to corrosive elements.

In particularly aggressive or chemically harsh environments, super alloys or specialty materials like Hastelloy or Inconel may be used for flange couplings, providing even higher corrosion resistance and chemical stability.


In addition to material selection, certain coatings can further enhance the resistance of flange couplings to corrosive environments. For example, coatings like zinc plating or epoxy coatings can add an extra layer of protection against corrosion.

Sealing and Protection:

Flange couplings used in harsh environments may also incorporate specialized sealing elements to prevent the ingress of contaminants, moisture, or corrosive substances. Proper sealing can significantly extend the service life of the coupling and the connected equipment.

Regular Maintenance:

While flange couplings designed for harsh environments are built to withstand corrosive elements, regular maintenance is essential to ensure their optimal performance. Regular inspections, cleaning, and lubrication, as well as prompt replacement of any damaged components, are vital to maintaining the integrity and functionality of the coupling.

Application Considerations:

When using flange couplings in corrosive or harsh environments, it is essential to consider the specific requirements of the application. Factors such as the type and concentration of corrosive substances, temperature variations, and mechanical loads should be carefully assessed to select the most suitable flange coupling for the given environment.


Flange couplings can be engineered to withstand corrosive and harsh environments by using appropriate materials, coatings, and sealing techniques. With proper selection, installation, and maintenance, flange couplings can provide reliable and durable performance in challenging industrial settings.

flange coupling

Key Features to Consider When Purchasing a Flange Coupling

When purchasing a flange coupling, it is essential to consider several key features to ensure it meets the specific requirements of your application. Here are the main factors to look for:

  • Type of Flange Coupling: There are various types of flange couplings, such as rigid, flexible, and fluid couplings. Choose the type that best suits your application’s needs, considering factors like misalignment compensation, torsional stiffness, and vibration damping.
  • Size and Dimensions: Select the flange coupling with the appropriate size and dimensions to fit your shafts and equipment. Consider shaft diameter, coupling length, and any space limitations.
  • Material: Flange couplings can be made from various materials, including steel, aluminum, stainless steel, and elastomers. Choose a material that offers the required strength, corrosion resistance, and durability for your operating conditions.
  • Torsional Rating: Check the torsional rating of the flange coupling to ensure it can handle the torque requirements of your application without failure or deformation.
  • Misalignment Compensation: If your application experiences shaft misalignment, opt for a flexible flange coupling that can accommodate angular, parallel, and axial misalignment to prevent stress on connected equipment.
  • Backlash: For precision applications, select a flange coupling with minimal or no backlash to maintain accurate positioning and reduce the effects of mechanical play.
  • Operating Speed: Consider the operating speed range of the flange coupling to ensure it can handle the rotational speed requirements without issues like resonance or fatigue.
  • Environmental Compatibility: Evaluate the flange coupling’s ability to withstand the environmental conditions of your application, such as temperature, humidity, and exposure to chemicals or corrosive substances.
  • Installation and Maintenance: Choose a flange coupling that is easy to install and maintain, as proper installation and periodic maintenance are crucial for optimal performance and longevity.
  • Cost and Value: Compare the cost of the flange coupling with its features and performance to ensure you are getting the best value for your investment.

By carefully considering these key features, you can select a flange coupling that not only meets the demands of your application but also ensures reliable and efficient power transmission while minimizing downtime and maintenance costs.

flange coupling

How Does a Flange Coupling Protect Connected Equipment from Shock Loads and Vibrations?

A flange coupling plays a crucial role in protecting connected equipment from shock loads and vibrations by absorbing and dampening the impact and oscillations. The design and material properties of flange couplings contribute to their ability to mitigate shock and vibrations effectively. Below are the key factors explaining how flange couplings provide protection:

1. Flexibility: Flexible flange couplings are designed with elastomeric or metallic elements that offer flexibility between the connected shafts. When subjected to shock loads or vibrations, these elements can absorb and dissipate the energy, preventing it from transmitting to the connected equipment. The flexibility allows the coupling to accommodate misalignment and minor shocks, reducing the stress on the system.

2. Damping Properties: Elastomeric elements used in certain flange coupling designs possess inherent damping properties. These materials can absorb and dissipate vibrational energy, reducing resonance and preventing harmful vibrations from being amplified in the system.

3. Misalignment Compensation: Flange couplings with flexible elements can compensate for certain degrees of misalignment between the shafts. Misalignment can lead to additional forces and vibrations in the system, but the coupling’s ability to accommodate this misalignment reduces the impact on the connected equipment.

4. Resilience: Flange couplings made from materials like steel or other alloys have high resilience and can withstand sudden shock loads without permanent deformation. This resilience helps maintain the coupling’s integrity and allows it to continue functioning effectively after exposure to shock events.

5. Friction Damping: Some rigid flange coupling designs incorporate friction damping features. These couplings rely on friction between the mating surfaces to dampen vibrations and prevent resonant frequencies from causing issues in the system.

6. Material Selection: The choice of materials for both flexible and rigid flange couplings is critical in their ability to protect connected equipment from shock loads and vibrations. High-quality materials with appropriate mechanical properties, such as strength and elasticity, enhance the coupling’s ability to withstand shocks and vibrations.

7. Proper Installation: Correct installation and alignment of the flange coupling are essential to ensure it functions as intended. Properly installed couplings can effectively manage shocks and vibrations, while misaligned couplings may experience premature wear and transmit higher forces to the connected equipment.

8. Maintenance: Regular maintenance, including inspection, lubrication, and monitoring, ensures that the flange coupling continues to provide protection against shocks and vibrations throughout its service life.

In summary, flange couplings protect connected equipment from shock loads and vibrations by providing flexibility, damping properties, misalignment compensation, resilience, and friction damping. The selection of suitable materials, proper installation, and regular maintenance further enhance their performance in protecting industrial machinery and equipment from potential damage caused by dynamic forces.

China supplier SS316 Flange Connection Ripple Compensator Coupling for Tube Big Size Telescopic Expansion Bellows Joint Flangeless with PTFE  flange couplingChina supplier SS316 Flange Connection Ripple Compensator Coupling for Tube Big Size Telescopic Expansion Bellows Joint Flangeless with PTFE  flange coupling
editor by CX 2024-03-01





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