Flexible Rubber Elbow
Flexible Rubber Elbow - pipe elbow fitting
Single sphere rubber joint with spray-painted carbon steel flange absorbs pipeline thermal displacement and mechanical vibration, with multiple rubber materials to adapt to different temperature and conveying medium requirements.
Carbon steel flange single sphere rubber joint, also named rubber expansion joint or flexible pipe compensator, is a composite pipeline fitting integrally vulcanized by multi-layer rubber, nylon cord fabric and circumferential steel wire strands, matched with spray-painted carbon steel flanges at both ends. It is specially developed to solve pipeline stress problems caused by thermal expansion, foundation settlement, equipment vibration and installation deviation.
Pump outlet, pipeline elbow and long-distance straight pipe sections are prone to vibration and displacement deformation. Our single sphere rubber joint can simultaneously bear axial extension, axial compression, lateral offset and angular deflection, effectively blocking vibration transmission between equipment and pipelines and cutting down pipeline resonance noise. The supporting carbon steel flange can be customized into various spray colors according to different project demands.
This rubber soft connector is widely applied in municipal water supply, thermal power, chemical, metallurgy, marine and heating pipelines, compatible with compressed air, fresh water, seawater, hot water, fuel oil and weak acid & alkali conveying media.
Our carbon steel flange single sphere rubber joints own comprehensive balanced performance, fully meeting the compensation, shock absorption and anti-corrosion demands of industrial fluid pipelines:
The single sphere rubber joint adopts multi-layer composite reinforced structure, each structural layer undertakes independent functional performance to guarantee pressure resistance and flexibility. The structural composition and material features are listed below:
| Structural Layer Name | Main Material | Core Function |
|---|---|---|
| Outer Glue Layer | NR/NBR/CR/EPDM | Anti-aging, UV resistance, external scratch protection |
| Nylon Cord Fabric Reinforcement | High tensile nylon cord cloth | Bears internal medium pressure, prevents rubber sphere swelling |
| Steel Wire Strand Ring | Carbon steel wire strand | Fix rubber end, avoid port bulging under pressure |
| Inner Glue Layer | NR/NBR/CR/EPDM | Direct contact with medium, anti-corrosion and anti-scaling |
| Connecting Flange | Spray-painted carbon steel | Pipeline connection, overall structural support |
Our rubber joints adopt one-piece mold vulcanization molding technology, strictly controlling every production link to ensure tight bonding between each reinforcement layer:
We set unified pressure, temperature and medium indicators for all standard single sphere rubber joints, and support customized high-temperature and high-pressure special versions for extreme working conditions:
| Performance Item | Standard Parameter | Custom Special Version Parameter |
|---|---|---|
| Rated Working Pressure (MPa) | 1.0 / 2.0 / 3.0 | Custom high pressure grade on demand |
| Burst Test Pressure (MPa) | 2.0 / 3.0 / 8.67 | 4 times working pressure for heavy-duty test |
| Applicable Temperature Range | -15℃ ~ +115℃ | -30℃ ~ 250℃ high temperature resistant rubber |
| Applicable Conveying Medium | Air, water, seawater, hot water, oil, weak acid & alkali | Strong corrosive medium with special lining formula |
The matching carbon steel flange of single sphere rubber joint covers mainstream global pipeline standards, adapting to domestic and overseas engineering construction demands:
All carbon steel flanges adopt surface anti-rust spray treatment, and customers can designate customized paint colors according to project visual requirements.
We supply complete rubber expansion joint product lines to form an integrated pipeline vibration isolation solution for full pipeline layout:
| Supporting Product Type | Available Specification | Main Application Position |
|---|---|---|
| Single Sphere Rubber Joint | DN32 ~ DN3000 | General straight pipeline vibration isolation |
| Double Sphere Rubber Joint | DN40 ~ DN1200 | Long-distance pipeline large thermal displacement |
| Reducer Rubber Joint | Concentric / Eccentric reducing | Pipeline diameter changing section |
| 90° Elbow Rubber Joint | DN50 ~ DN800 | Pipeline turning elbow position |
Carbon steel flange single sphere rubber joints are widely used in all fluid conveying pipelines with vibration and thermal displacement risks:
Compared with metal expansion joints and fabric compensators, single sphere rubber joints have obvious advantages in shock absorption, installation cost and medium adaptability:
| Compensator Type | Shock Absorption Effect | Medium Corrosion Resistance | Installation Cost | Service Life |
|---|---|---|---|---|
| Metal Bellows Compensator | Poor | Medium | High | 3-5 years |
| Fabric Expansion Joint | Medium | Good | Medium | 1-2 years |
| Single Sphere Rubber Joint | Excellent | Excellent | Low | 5-8 years |
Correct installation and regular maintenance can maximize the displacement compensation and shock absorption performance of rubber joints, and effectively extend service life:
Before installation, check the rubber sphere surface for cracks, bubbles and delamination, confirm the nominal diameter, pressure grade and rubber material match the pipeline conveying medium. Align flange holes symmetrically, place flat rubber gaskets, and tighten bolts crosswise to avoid unilateral stress extrusion.
It is forbidden to twist the rubber joint to adjust pipeline installation deviation, and vertical pipelines must set supports near flanges to avoid the rubber sphere bearing pipeline weight directly. During daily operation, do not exceed rated temperature and pressure range; minor surface cracks can be repaired with special rubber repair glue, while leaking or bulging products need to be replaced entirely.
Our single sphere rubber joint adopts optimized multi-layer composite structural design to improve pressure resistance, compensation capacity and structural stability:
The internal nylon cord fabric is arranged in cross weaving layout to evenly disperse internal pressure, and circumferential steel wire strands lock both ends of the rubber sphere to prevent expansion deformation under medium pressure. The inner and outer rubber layers use one-piece vulcanization without interface gaps, effectively blocking medium penetration and delaying aging failure.
For large-diameter DN1400-DN3000 heavy-duty models, we increase the number of cord fabric layers and wire strand rings to enhance bearing capacity and ensure stable operation under large pipeline displacement.
Every batch of carbon steel flange single sphere rubber joints will pass multiple strict inspection items before delivery, complying with industrial pipeline compensation fitting standards:
Complete factory inspection reports, material certificates and installation operation manuals are delivered together with goods for customer acceptance and construction guidance.
We provide one-stop full customization service for single sphere rubber joints according to customers' special pipeline parameters and working environment demands:
Our professional technical team can customize rubber material formula, non-standard nominal diameter, lengthened overall length L, enhanced compensation stroke and mixed standard flanges. High temperature resistant, ultra-low temperature, strong acid and alkali resistant special rubber joints can be developed for complex harsh working conditions.
We also provide on-site pipeline measurement, installation technical guidance and long-term after-sales maintenance services, delivering complete pipeline vibration isolation solutions for all industrial projects.
We adopt targeted shockproof and moisture-proof packaging for rubber joints to avoid rubber scratch, flange deformation and structural damage during long-distance transportation:
Small and medium diameter DN32-DN300 rubber joints are wrapped with plastic film and packed into plywood wooden cases filled with foam buffer materials. Large diameter DN400-DN3000 products are wrapped separately for rubber bodies, flanges covered with plastic protective sleeves, bundled and fixed on steel pallets to prevent collision extrusion.
We support sea freight, land truck transportation and air freight, and can flexibly arrange transportation modes according to customers' delivery cycle and destination requirements. All goods are attached with complete product qualification documents for customs clearance and project acceptance.
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When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
