AXIAL AW - AW/F-FA PRESSURE BALANCED AXIAL AW/SE - AW/F/SE   AW/SE 90 - AW/F/SE 90 CALCULATION OF THE THRUSTS The axial expansion joints, composed of one or more bellows, are planned and built, to absorb the axial movements. They always are installed among two fixed points, regulated so that they can bear the thrust due to the inside pressure. Sp = Am * Pe For a correct installation it is necessary to presetting the joint, calculating the length to the assemblage, as follows: were: Sp = thrust Am = medium area Pe = pressure L = length Tmax = maximum working temperature Tmin = minimum working temperature Tm = mounting temperature Δ = expansion of the pipeline between Tmin and Tmax Ce = extension travel Cc = compression travel FIXED POINTS To allow to the axial expansion joint to perfectly carry out its function, it is necessary to limit strengths (displacements and rotations) generated on pipeline, using fixed points. Usually fixed points are distinguished in: main fixed point PF intermediate fixed point PI GUIDE An appropriate positioning of fixed points and guides in a pipeline, can check the movement of the expansion joint. AXIAL EXPANSION JOINTS INSTALLATION SCHEMES CHEMI INSTALLAZIONE TECHNICAL TABLES click here to access the technical table

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