Expansion Joints

        

INTRO:
  The Expansion Joints are elements that provide permanent flexibility in a pipe system absorbing the dimensional changes caused by the thermal expansion or contraction of a pipeline, duct or vessel.

  The Expansion Joints are flexible elements that depending on the material grade and its thickness resists high or low temperatures and are capable of handling corrosive fluids, remaining operatives for a long period of time in vacuum or positive pressure condition.

  Vilanova y Cruz, S. L. supplies Expansion Joints from DN 15 up to large diameters only limited by the transport possibilities.

  Depending on the diameter our bellows can be supplied for an internal pressure up to PN 64.

  The temperature limits depends on the material grade. The standard bellows material is stainless steel W. Nr. 1.4541 (TP 321). Other usual materials are W. Nr. 1.4571 (TP 316 Ti), W. Nr. 1.4404 (TP 316 L) and the type W. Nr. 1.4828 for temperatures over 550 °C. Inconel 625 and Incoloy 825 are applied for special conditions according to these material properties. Other bellows materials could be supplied according to the customer requisitions.

  The Expansion Joints are tested pneumatically or hydrostatically and the welding areas are examined with a liquid penetrant test.

  The bellows design is calculated according to E. J. M. A., AD - Merkblatter, and other international standards.