Versatile Flange Type Rubber Expansion Joint for Pipe Connections
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Product Details
| Customization: | Available |
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| Standard: | ANSI, DIN, GB, JIS, GOST, BSW |
| Type: | Welding Flange |
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Basic Info.
- Model NO.
- GC-R877
- Material
- Stainless Steel
- Structure
- Flanges
- Connection
- Flanged
- Sealing Surface
- TG
- Manufacturing Way
- Forging
- Applicable Media
- Water, Steam, Air, Weak Acid/Alkaline Solution, Oi
- Flange Sealing Surface Form
- Flat Surface (FF), Convex Surface (RF), Ring Joint
- Anti-Pull-off Design
- Limiting Rod (Adjustable/Fixed), Anti-Pull-off Fla
- Lining
- Smooth Surface (Anti-Scaling), Guide Tube (Anti-Sc
- Structure Type
- Single Sphere, Double Sphere, Triple Sphere, Reduc
- Flange Material
- Carbon Steel Q235B, Stainless Steel 304/316L, Forg
- Connection Type
- Single Flange (Flange on One End + Welding on One
- Transport Package
- Standard Export Packaging
- Specification
- Can be customized
- Trademark
- GOCHAIN
- Origin
- China
- HS Code
- 4016991000
- Production Capacity
- 5000000
Packaging & Delivery
- Package Size
- 210.00cm * 180.00cm * 180.00cm
- Package Gross Weight
- 598.000kg
Product Description
Flange type rubber expansion joint is a kind of rubber flexible pipe joint with flange, which can compensate the pipe displacement, reduce vibration and noise through elastic deformation, and protect the safe operation of the system.
Anti-pull-off safety design
Patented wire ring locking: 2 embedded 304 wire rings, pull-off resistance ≥ 1.5 times the working pressure (DN400 measured tensile strength > 50 tons)
Adjustable limit pull rod (optional): mechanical hard limit to prevent over-compensation displacement from causing pipe burst (especially suitable for pipelines with settlement risk)
Patented wire ring locking: 2 embedded 304 wire rings, pull-off resistance ≥ 1.5 times the working pressure (DN400 measured tensile strength > 50 tons)
Adjustable limit pull rod (optional): mechanical hard limit to prevent over-compensation displacement from causing pipe burst (especially suitable for pipelines with settlement risk)
1. Zero leakage seal Rubber-flange high temperature molded integrated vulcanization (peel strength ≥ 8kN/m) + adaptive convex seal (RF) design
2. Vibration attenuation ≥ 90% Multi-layer rubber-cord composite structure absorbs high-frequency impact (10~200Hz) and reduces the vibration energy transmitted by the pump/compressor
3. Multi-directional displacement compensation Axial ±150mm + lateral ±50mm + angular ±15° (DN1000 level) to eliminate thermal stress
2. Vibration attenuation ≥ 90% Multi-layer rubber-cord composite structure absorbs high-frequency impact (10~200Hz) and reduces the vibration energy transmitted by the pump/compressor
3. Multi-directional displacement compensation Axial ±150mm + lateral ±50mm + angular ±15° (DN1000 level) to eliminate thermal stress
Safety : EU Pressure Equipment Directive PED 2014/68/EU (. IV), ISO 9001 quality system
Performance
Fatigue life: Passed ISO 7326 standard test (>5 million displacement cycles)
Burst pressure: ≥3 times design pressure (PN16 product measured >6.0MPa)
Environmental : RoHS 2.0 (heavy metal limit), REACH (no PAHs precipitation)
Performance
Fatigue life: Passed ISO 7326 standard test (>5 million displacement cycles)
Burst pressure: ≥3 times design pressure (PN16 product measured >6.0MPa)
Environmental : RoHS 2.0 (heavy metal limit), REACH (no PAHs precipitation)
Adaptation to working conditions
High-pressure scenario: increase the number of fabric layers (≥4 layers) + steel wire ring reinforcement;
High-vibration scenario: select double-sphere structure (vibration absorption rate increased by 40%);
Pipeline with sedimentation risk: anti-pull-off limit rod must be installed;
Seawater environment: flange material must be 316L stainless steel (pitting corrosion resistant).
High-pressure scenario: increase the number of fabric layers (≥4 layers) + steel wire ring reinforcement;
High-vibration scenario: select double-sphere structure (vibration absorption rate increased by 40%);
Pipeline with sedimentation risk: anti-pull-off limit rod must be installed;
Seawater environment: flange material must be 316L stainless steel (pitting corrosion resistant).
Key sealing technology
Flange sealing surface: convex surface (RF) accounts for 90% of the market, and is matched with non-metallic gaskets (rubber/graphite) to achieve zero leakage;
Ball-flange bonding: high-temperature compression molding and vulcanization, peel strength ≥8kN/m (ISO 813 standard).
Flange sealing surface: convex surface (RF) accounts for 90% of the market, and is matched with non-metallic gaskets (rubber/graphite) to achieve zero leakage;
Ball-flange bonding: high-temperature compression molding and vulcanization, peel strength ≥8kN/m (ISO 813 standard).
Flange-Type Rubber Expansion Joint Core Parameters
| Parameter Category | Parameter Item | Typical Value/Range | Unit | Remarks |
|---|---|---|---|---|
| Basic | Nominal Diameter (DN) | DN50 ~ DN3000 | mm | or NPS 2" ~ 120" (inch system) |
| Nominal Pressure (PN) | PN6 ~ PN25 | Bar | US Std: Class 150 ~ 300 | |
| Flange Connection Std | GB/T 9119 (CN) ANSI B16.5 (US) EN 1092-1 (EU) JIS B2220 (JP) |
- | Sealing face: RF (Raised Face), FF (Flat Face), etc. | |
| Displacement Capacity | Axial Compression | +6 ~ +45 | mm | Increases with diameter (e.g., +14mm for DN100) |
| Axial Extension | -10 ~ -25 | mm | e.g., -28mm for DN100 | |
| Lateral Displacement | ±5 ~ ±35 | mm | Multi-convolution design for large displacement | |
| Angular Deflection | ≤15° | ° | Per convolution | |
| Material Configuration | Main Rubber Material | NR / CR / NBR / EPDM / FKM | - | By media: NR: air/water; NBR: oils; EPDM: hot water/steam; FKM: corrosive media |
| Reinforcement Layer | Multi-ply polyester cord/steel wire | - | Critical pressure-bearing structure | |
| Flange Material | Q235 carbon steel / SS304 / SS316L | - | Selected by corrosion resistance | |
| Performance Parameters | Operating Temp. Range | -30ºC ~ +180ºC | ºC | Depends on rubber: EPDM: -30~120ºC; FKM: -20~180ºC |
| Compatible Media | Water/air/oils/weak acids & alkalis | - | PTFE lining required for strong acids/alkalis | |
| Burst Pressure | ≥4 × working pressure | MPa | Safety redundancy design | |
| Vacuum Resistance | -0.08 ~ -0.1 | MPa | Requires anti-collapse rings | |
| Structural Parameters | Number of Convolutions | Single / Double / Triple | - | Multi-convolution enhances displacement capacity |
| Flange Bolt Holes | 4 (DN50) ~ 48 (DN3000) | pcs | Complies with relevant flange standards |
Use standard international export standard transport packaging
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