Expansion joint (bellows)

ISO 10628-2 (groups 24-25, fittings and piping) / PIP PIC001

Drawn as

A zig-zag bellows drawn above and below the pipe between two flange bars.

Meaning

Metallic or rubber bellows that absorbs thermal movement or vibration: exhaust ducts, seawater pump discharges and flare headers. Becomes expansion-joint.

Variants

Rubber expansion joints may be drawn as a bulged section