Expansion Joint Compensator – 3D Design

Expansion Joint Compensator Type: Axial Expansion Joint for Piping Systems

Design: SolidWorks 3D CAD modeling focused on thermal compensation and structural
durability in pressure-bearing piping systems.

Material & Structure

• Material: High-temperature stainless steel (e.g., AISI 316L or Inconel 625) or Alloy Steel, for
corrosion resistance and durability under thermal cycles
• Bellows: Multi-ply thin-walled corrugated stainless steel structure to allow axial flexibility while
maintaining pressure containment
• Cover/Guard: External protective sleeve (carbon steel or stainless steel) for shielding bellows
from mechanical damage
• Weld Ends/Flanges: Standard ASME B16.5 flange connections or beveled weld ends for
integration into pipeline
• Spring Element: Internal concentric coil spring (heat-treated alloy steel) designed to absorb
and dampen axial movement due to expansion or contraction
• Internal Diameter: 900 mm (corresponds to 450 mm internal radius)

Function & Mechanical Design

• Thermal Compensation: Designed to compensate for axial expansion/contraction in piping
systems due to temperature changes or pressure surges
• Spring Mechanism: Preloaded coil spring located concentrically around internal support sleeve
to assist in restoring neutral position and reduce stress peaks
• Guide Sleeve: Central internal sleeve to prevent direct media contact with the spring and
maintain flow alignment
• Movement Capacity: Designed for ±50 mm axial travel; fatigue-tested for thermal cycling

Industrial Sector

CAD & Drawing Platforms

• 3D Modeling & Assembly: SolidWorks – parametric model with defined motion studies to
simulate thermal expansion cycles and mechanical stress distribution.