Rubber Expansion Joints


Different types of rubber expansion joints

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Seiris’ rubber expansion joints are customized according to the following constraints:

  • Temperature up to 200°C
  • Pressure up to 20 Bars
  • Diameter dimensions from 25 to 4000 mm

We manufacture all types of:

  • Circular expansion joints
  • Single convolution, double or triple convolutions, with tie rods, conical, balanced pressure
  • And rectangular expansion joints: Single convolution or double convolutions

Pumped fluid: all kind of (acid or strong bases very agressive when going under dew point) : in order to adapt our products to those various conditions, we use the following rubbers :
Rubber, Neoprene, EPDM, Silicon, Butyl, Chlorobutyl, NITRILE, SBR, HYPALON AND VITON

For flanges we use following steels: S 275JR, S355J2G3, AISI 304, 316, 316L.

Rubber expansion joints are studied, manufactured and tested following international standards : FSA and ASTM.


Design Criteria

Temperature resistance
Resistance to corrosion
Forming capacity
Mechanical characteristics


Main Advantages

  Medium to high pressure resistance
 Low spring rates
  Low maintenance
Large cycle life

Rubber Expansion Joints are designed, manufactured and tested according to Internationally
Recognized Codes and Standards :

F.S.A (Fluid Sealing Association)

A wide range of tests can be carried out on customers request

Hydraulic pressure test

Vacuum test

Material analysis

Spring rates

Movement test

Dimensional inspections
Technical assistance for the design of piping systems

On site inspection


Training and seminars
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