Technical Specifications

Design and Operating Principle

Seismic expansion joints feature a metal bellows structure designed to provide high fatigue life and multi-axis movement capability. The bellows geometry is optimized to absorb sudden axial, lateral, and angular displacements that may occur during seismic events.

Single-bellows, double-bellows, or universal-type designs allow solutions suitable for different movement scenarios. Flanged or weld neck connection options enable easy integration into the system.

Engineered in accordance with international seismic design criteria, these systems offer high strength and reliability in critical process and safety applications.

Performance Advantages

• Absorbs movements occurring during earthquakes
• Reduces risk of damage to pipelines and equipment
• Provides safe response to sudden and high displacements
• Helps maintain system sealing integrity
• Increases plant safety
• Provides multi-axis movement capability
• High fatigue resistance
• Long service life

Operating Values

Operating Pressure

• Maximum 40 bar
• (depending on DN size and design)

Operating Temperature

• -50°C / +550°C
• (depending on bellows material)

Movement Capabilities

• Axial Movement: ±20 mm – 100 mm
• Lateral Movement: ±25 mm – 200 mm
• Angular Movement: ±5° – 15°

Note: Seismic expansion joints are designed to accommodate not only normal thermal movements but also sudden and high-amplitude seismic displacements.