1. Structural Design and Connection Method

• Advantages of Grooved Connection: Adopts a grooved interface (Coupling Groove), eliminating the need for welding or flange connection. It can be installed by clamping with a hoop, significantly reducing construction time and avoiding damage to the expansion joint from welding heat.
• Corrugated Structure Features: The main body is composed of a stainless steel bellows (Bola Perut Baja Stainless). The corrugated shape (U-type or Ω-type) can absorb axial, lateral, and angular displacements of the pipeline, with strong flexibility.

2. Displacement Compensation Capacity

• Multi-directional Compensation:
  • Axial displacement compensation: Absorbs length changes caused by thermal expansion and contraction (e.g., ±50mm to ±200mm, depending on specifications).
  • Lateral and angular offset: Adapts to installation errors or offsets caused by vibration, with a maximum compensation angle of ±15°.
• High Elastic Recovery: The corrugated structure quickly restores to its original shape after displacement, resistant to plastic deformation during long-term use.

3. Materials and Corrosion Resistance

• Main Materials: Commonly uses 304 or 316L stainless steel, resistant to acid, alkali, and high temperatures (up to 400℃, depending on the material), suitable for corrosive medium environments such as chemical, heating, and water treatment industries.
• Seal Configuration: Grooved connections are typically equipped with EPDM or NBR rubber seals to enhance tightness and prevent medium leakage.

4. Pressure Resistance and Vibration Resistance

• Pressure Range: Working pressure ranges from 1.0MPa to 2.5MPa. High-pressure models are suitable for industrial pipeline systems (e.g., steam pipelines, high-pressure fluid transportation).
• Vibration Resistance: The corrugated structure buffers pipeline vibrations, reducing loosening or fatigue damage of interfaces caused by mechanical vibrations. It is suitable for connecting pipelines of equipment such as compressors and pumps.

5. Installation and Maintenance Advantages

• Convenient Installation: Grooved connection requires no professional welding skills and simple on-site tools (e.g., wrenches), reducing construction costs.
• Maintenance-free Design: Stainless steel is corrosion-resistant, requiring no regular maintenance under normal conditions, with a service life of over 10 years (depending on the usage environment).
• Reusability: If the seal is undamaged after disassembly, it can be reinstalled, offering better economy than disposable expansion joints.

6. Application Scenarios

• Industrial Pipeline Systems: Heating networks, central air conditioning water circulation, chemical medium transportation, gas pipelines, etc.
• Construction Engineering: Displacement compensation for water supply and drainage pipelines and fire protection pipelines in high-rise buildings.
• Equipment Connection: Flexible connection between equipment (e.g., fans, water pumps, compressors) and pipelines to reduce vibration transmission.

7. Specifications and Customization

• Diameter Range: DN50 to DN1200 (or larger), with customizable non-standard specifications for engineering needs.
• Special Customization: For high-temperature, high-pressure, or strongly corrosive environments, multi-layer bellows, PTFE linings, and other special structures can be customized.

Comparison with Other Expansion Joints (Simplified Table)

Notes

• Ensure the pipeline axis is aligned with the center of the expansion joint during installation to avoid reduced compensation capacity due to off-center loading.
• In high-temperature conditions, limit devices should be used to prevent excessive stretching or compression of the corrugations.