Flexibility of Bellows and Lens Expansion Joints

Related Topics

Bellows and lens expansion joints are characterized by their linear and angular flexibility properties. These elastic characteristics must be defined for all piping systems containing such expansion joints. While manufacturers' catalogs typically provide this data, terminology differences often complicate direct application. To address this, the software calculates elastic properties using fundamental structural parameters.

Input data can be copied using the toolbar icon and transferred to other START-Elements analyses using the toolbar icon.

Input Data

Property

Description

Corrugated element external diameter, De

See figure

Corrugated element internal diameter, Di

See figure

Corrugated element wall thickness, S

See figure

Wave (lens) spacing, q

See figure

Wave (lens) number

See figure

Operating temperature, Twork

Temperature in operating state. More...

Steel grade

Pipe material from materials database

Output

START-PROF calculates axial, angular, and lateral stiffness and flexibility values for the expansion joint (depending on selected element type). See also "flexibility and stiffness"

Menu Access

Expansion joint > Axial Expansion Joint

Expansion joint > Gimbal Expansion Joint

Expansion joint > Lateral Expansion Joint