Fixed Flange Expansion Joints

MAXWOR fixed flange expansion joints are metal bellows expansion solutions designed to absorb axial movements caused by thermal expansion and vibration in pipeline systems. Thanks to the fixed flange connections on both ends, they can be easily integrated into systems.

They provide safe operation especially in steam, hot fluid, and process lines operating under high temperature and high pressure. By reducing stresses on the pipeline, they extend equipment life and improve system safety.

Due to their compact and durable structure, they are widely used in power plants, petrochemical facilities, HVAC main lines, and industrial process applications.

Technical Specifications

Design and Operating Principle

Fixed flange expansion joints absorb axial movements occurring in pipeline systems through their stainless steel metal bellows structure. The bellows provide controlled flexibility, minimizing mechanical stresses caused by thermal expansion.

The fixed flange connections at both ends can be manufactured in accordance with DIN or ANSI standards. The design is optimized to ensure long-term safe operation under high temperature and pressure conditions.

Performance Advantages

  • Safely absorbs axial movements
  • High temperature and pressure resistance
  • Reduces stress on pipelines and equipment
  • Easy installation thanks to flanged design
  • Low maintenance requirement
  • Compact and robust construction
  • Long service life

Operating Values

Operating Pressure

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

Operating Temperature

  • -196°C / +550°C
  • (depending on bellows material)

Movement Capabilities

  • Axial Movement: ±10 mm – 50 mm
  • Lateral Movement: Limited
  • Angular Movement: Limited

Note: Fixed flange expansion joints are primarily designed to absorb axial movements. In applications with significant lateral or angular movement, different types of expansion joints should be used instead.

Design & Material

In fixed flange expansion joints, the bellows structure is designed to provide high flexibility and mechanical strength. Depending on the application, single-ply or multi-ply bellows designs can be used.

Bellows Materials

  • AISI 304
  • AISI 316 / 316L
  • AISI 321
  • AISI 310S
  • (for high-temperature applications)

Flange Materials

  • Carbon steel (P235GH, ASTM A105)
  • Stainless steel (optional)

Optional Design Features

  • Internal liner
  • External protective coating
  • Multi-ply bellows design
  • Special pressure and temperature solutions

Manufacturing is project-specific and optimized according to operating pressure, temperature, fluid type, and movement requirements.

Applications

  • Power plants
  • Steam lines
  • Industrial process piping
  • Refinery and petrochemical facilities
  • HVAC main lines
  • High temperature and high pressure applications

Application Areas

Documents

Quotation Form