Reinforced Rubber Flange Expansion Joint - Durable Pipeline Vibration Isolation & Noise Reduction Flexible Bellows Coupler
Reinforced Rubber Flange Expansion Joint - Durable Pipeline Vibration Isolation & Noise Reduction Flexible Bellows Coupler
Product Description
The Reinforced Rubber Flange Expansion Joint is a high-performance engineering component meticulously crafted to provide a robust seal and unparalleled flexibility in demanding piping systems. Built with a heavy-duty synthetic rubber body—typically EPDM or NBR—and reinforced with internal layers of high-strength cord fabric, this joint is designed to withstand significant internal pressure while effectively neutralizing the destructive effects of mechanical vibration and noise generated by pumps and motors. Its specialized bellows geometry allows it to absorb multi-axial movements, including axial compression, extension, and lateral or angular misalignment, which prevents structural stress caused by thermal expansion and contraction. The outer surface is engineered for durability, offering excellent resistance to aging, ozone, and environmental weathering, while the precision-machined metal flanges ensure a secure, leak-proof connection to standard industrial pipelines. By isolating shock and accommodating system shifts, this flexible coupler significantly extends the operational lifespan of your entire infrastructure, ensuring a quieter, safer, and more stable fluid transport environment.
Performance characteristics
1. Flexibility: Accommodates axial, lateral, and angular movements.
2. Durability: Reinforced rubber flexible joint provides long-lasting performance.
3. Corrosion Resistance: Resists aggressive environments and chemicals.
4. Noise & Vibration Reduction: Dampens vibrations and shock waves.
5. Ease of Installation & Maintenance: Compact design and standard flange connections facilitate installation and upkeep.
Product Specification
| Size | Length | Allowable Movements in Operation | ||||
| mm | inch | mm | Axial Compression mm | Axial Extension mm |
Transverse Movement mm |
Angular Deflection mm |
| 25 | 1 | 130/152 | 20 | 12 | 14 | 15° |
| 32 | 1 1/4 | 95/130/152 | 20 | 12 | 14 | 15° |
| 40 | 1 1/2 | 95/130/152 | 20 | 12 | 14 | 15° |
| 50 | 2 | 105/130/152 | 20 | 12 | 14 | 15° |
| 65 | 2 1/2 | 115/130/152 | 20 | 12 | 14 | 15° |
| 80 | 3 | 130/135/152 | 20 | 12 | 14 | 15° |
| 100 | 4 | 130/152 | 20 | 12 | 14 | 15° |
| 125 | 5 | 130/152/165 | 20 | 12 | 14 | 15° |
| 150 | 6 | 130/152/185 | 20 | 12 | 14 | 15° |
| 200 | 8 | 130/152/210 | 20 | 12 | 14 | 15° |
| 250 | 10 | 130/203/230 | 20 | 12 | 14 | 15° |
| 300 | 12 | 130/203/245 | 25 | 16 | 22 | 15° |
| 350 | 14 | 200/255 | 25 | 16 | 22 | 15° |
| 400 | 16 | 200/255 | 25 | 16 | 22 | 15° |
| 450 | 18 | 200/255 | 25 | 16 | 22 | 15° |
| 500 | 20 | 200/255 | 25 | 16 | 22 | 15° |
| 600 | 24 | 260 | 25 | 16 | 22 | 15° |
| 700 | 28 | 260 | 25 | 16 | 22 | 15° |
| 800 | 32 | 260 | 25 | 16 | 22 | 15° |
| 900 | 36 | 260 | 25 | 16 | 22 | 15° |
| 1000 | 40 | 260/300 | 25 | 16 | 24 | 15° |
| 1100 | 44 | 300 | 25 | 16 | 24 | 15° |
| 1200 | 48 | 300 | 25 | 16 | 24 | 15° |
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Note: If the medium is oil, acidic or alkaline substances, and there are special requirements for the working temperature, you can customize it by sending a letter or drawing. Please specify when ordering |
Product Details
Production Flow
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1.Raw material Top level CR/EPDM/NBR rubber raw materials, No recycled rubber |
2.Plasticating and mixing Special Formulation for better Bending with Nylon,For Better Strength,Sealing |
3.Workblanks wraping Cooper plated steel wire reinforcement prevent pull off |
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4.Vulcanizing Automatic vulcanization machine ensure vulcanization time and pressure |
5.Inspecting |
6. Packaging |
Application
Rubber Expansion Joint Standard are widely used in various fields, including construction, chemical industry, shipbuilding, tap water, gas, chemical pipelines, petroleum pipelines, food pipelines, air conditioning pipelines, and sewage treatment.
Our Services
1.24-hour online
2.Free samples provided
3.Support customization
4.Provide drawings
5.Multiple payment styles to choose from
6.Factory inspection (material, specifications, quantity, pressure, packaging)
7.Long warranty period
8.Suitable packaging for transportation
Our Customer
Certificate
FAQ
Q1: How do I choose between EPDM and NBR rubber materials?
It depends entirely on the medium inside the pipe. EPDM is excellent for hot/cold water, steam, and general weather resistance. NBR (Nitrile) is the go-to choice if your pipeline carries oil, petroleum, or hydrocarbon fluids, as it prevents the rubber from swelling and degrading.
Q2: Does this expansion joint require additional gaskets for installation?
In most cases, no. The rubber bellows design features a self-sealing integrated rubber flange face. When bolted against the mating metal flange, the rubber itself acts as a high-quality gasket, providing a tight seal.
Q3: Can these joints be used in suction lines as well as discharge lines?
Yes, but for high-vacuum suction applications, we recommend a model with a vacuum ring (internal steel reinforcement) to prevent the bellows from collapsing inward. Please specify your vacuum requirements during ordering.
Q4: How do I know when it’s time to replace the joint?
You should perform regular visual inspections. Look for signs of "alligatoring" (surface cracking), ballooning, or any fluid seepage at the flange. If the rubber feels hard or brittle rather than flexible, it’s time for a replacement to avoid sudden failure.
Q5: Are control units/tie rods necessary?
Control units are highly recommended when the piping system is not properly anchored. They prevent the expansion joint from over-extending or "pulling out" due to the pressure thrust of the fluid, acting as a safety limit.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.