Flexible Rubber Joint – 3 Bolt Connection
Flexible Rubber Joint – 3 Bolt Connection
Heavy‑Duty, Vibration‑Suppressing Rubber Expansion Joints for Oilfield, Marine & Civil Piping Systems
🔍 What is a 3‑Bolt Flexible Rubber Joint?
A 3‑Bolt Flexible Rubber Joint is a compact, elastomeric expansion joint with a molded rubber bellow and three triangular, floating forged steel flanges fastened by three bolts. This design ensures a secure, slippage‑resistant connection while absorbing axial, lateral, and angular movements and dampening vibration and noise in pipe systems.
⚙️ Technical Specifications
Parameter | Specification |
Size Range | DN 15–DN 50 (½”–2″) |
Working Pressure | 16 bar standard; optional 20 bar models |
Test Pressure | 1.5× working (24 bar for 16 bar model; 30 bar for 20 bar) |
Burst Pressure | Approx. 4× working pressure |
Vacuum Rating | Down to 650 mmHg |
Temp. Range | –20 °C to +105 °C (derate ~30% at upper range) |
Compression | 17 mm |
Elongation | 6 mm |
Lateral Movement | 15 mm |
Angular Deflection | ±25° to ±15°, depending on size |
Bellows Material | Neoprene (standard); EPDM (≤121 °C), NR, SBR, CBR; suitable for drinking water |
Reinforcement | Multi‑ply nylon tire‑cord fabric |
Flanges | Triangular forged steel floating flanges (BS21 threading, epoxy powder coat) |
Bolts/Nuts | Zinc-plated steel |
🧪 Material Options & Rubber Types
Rubber Type | Temp Range | Media Compatibility |
Neoprene | –20 °C to +105 °C | Oil, seawater, mild chemicals, HVAC |
EPDM (suffix “OW” for drinking water) | Up to +121 °C | Hot/chilled water, acids, alkalis |
NR / SBR / CBR | Varies | General industrial media |
📊 Performance & Load Ratings
- Axial compression: 17 mm
- Axial elongation: 6 mm
- Lateral deflection: 15 mm
- Angular: ±25° to ±15° depending on DN
- Vacuum tightness: 650 mmHg
- Burst strength: ~4× working pressure
🌍 Ideal Applications
- Oil & Gas: Vibration isolation, pump and compressor lines
- Marine & Shipbuilding: Seawater and bilge connections, corrosion-resistant marine elastomers
- Civil Works: HVAC systems, chillers, cooling towers, risers, water distribution
- Process & Power Plants: Thermal expansion joints, surge dampeners
- Drinking Water Systems: EPDM-lined drinking-water safe variants
✅ Benefits of 3‑Bolt Joints
- 🔩 Secure triangular floating flange prevents slippage and bolted leak paths
- 🔇 Excellent vibration & noise damping thanks to volumetric expansion and neoprene bellows
- 🛡️ Heavy-duty forged steel flanges outperform cast unions in strength and durability
- 📏 Multiple movement absorption (axial, lateral, angular)
- 🌊 Chemical and temperature adaptability via rubber selection
- ♻️ Easily maintained small-size installation
Flexible Rubber Joint – 3 Bolt Connection – Burj Al Noor Trading L.L.C
Flexible rubber joints – 3 bolt connection are engineered connectors designed to absorb vibration, thermal expansion, and misalignment in piping systems. The 3-bolt connection design ensures secure fastening, easy installation, and maintenance, making these joints ideal for systems where space is limited or frequent disassembly is required.
These joints are widely used in HVAC, water supply, sewage, chemical, and industrial piping applications. Made from high-quality rubber, they provide excellent resistance to wear, pressure fluctuations, and corrosion, protecting pumps, valves, and pipelines while extending system life.
At Burj Al Noor Trading L.L.C, we are trusted flexible rubber joint suppliers in Dubai, specializing in flexible rubber joints – 3 bolt connection suppliers in Dubai. Our 3-bolt connection flexible rubber joints are designed to accommodate axial, lateral, and angular movements, ensuring smooth and reliable operation in various industrial and commercial applications.
Whether for chilled water, drainage, chemical transfer, or process piping, our flexible rubber joints – 3 bolt connection provide easy installation, low maintenance, and long-lasting performance, reducing stress on connected equipment.
Our Range of Flexible Rubber Joints – 3 Bolt Connection Includes:
Single-Sphere / Single-Arch Flexible Rubber Joints
Double-Sphere / Double-Arch Flexible Rubber Joints
Reinforced High-Pressure Flexible Rubber Joints
PTFE-Lined or Chemical-Resistant Rubber Joints
Customized Sizes and 3-Bolt Connection Specifications
Choose Burj Al Noor Trading L.L.C as your reliable flexible rubber joint suppliers in Dubai. We deliver high-quality products, competitive pricing, and timely supply for contractors, industries, and infrastructure projects across the UAE.
We deal in all kinds of flexible rubber joints, including: 3-bolt connection, union type, single-sphere, double-sphere, reinforced, PTFE-lined, chemical-resistant, and custom-designed flexible rubber joints for industrial and commercial applications.