Lateral-angular bellows expansion joints

Design features of lateral-angular bellows expansion joints

Lateral-angular bellows expansion joint is a hinged structure consisting of a bellows (or two bellows connected to each other through a tube insert), connecting fittings and limiting fittings that prevent the expansion joint length change (lengthening or shortening).

Hinged design of the limiting fittings of lateral-angular bellows expansion joint does not impede angular and shear displacements.

Limiting fittings connected with the connecting branch pieces absorb the separating forces arising from the action of internal pressure on the bellows and do not transfer them to the fixed supports and equipment.

Depending on type of the applied limiting fittings, lateral-angular bellows expansion joints may be manufactured as single-plane, taking up lateral and angular displacements in only one plane, and spatial, taking up lateral and angular displacements in all directions.

Kompensator SPE, JSC offers the following types of lateral-angular bellows expansion joints:

single-plane single-bellows expansion joints, type SOPN (СОПН);
single-plane two-bellows expansion joints, type 2SOPN (2СОПН);
single-plane single-bellows expansion joints with flanges, type SFN (СФН);
two-plane two-bellows expansion joints with flanges, type 2SFN (2СФН).

The above expansion joints can be installed directly in pipelines carrying water (delivery and drinking water) under a temperature of up to 150 °С and at a flow rate of up to 8 m/s, oil and oil products under a temperature of up to 450 °С and at a flow rate of up to 8 m/s, as well as steam and gaseous media that do not corrode materials of the expansion joint under a temperature of up to 500 °C and at a flow rate of up to 20 m/s.

Lateral-rangular bellows expansion joints can be installed directly in pipelines carrying water (delivery and drinking water) under a temperature of up to 150 °С and at a flow rate exceeding 8 m/s, oil and oil products under a temperature of up to 450 °С and at a flow rate exceeding 8 m/s, as well as steam and gaseous media that do not corrode materials of the expansion joint under a temperature of up to 500 °C and at a flow rate from 20 to 80 m/s provided a branch piece is installed.