Cardanic expansion joints are made by of stainless steel AISI 316 or 321 multilayes bellows, with different number of walls depending on the nominal pressure PN and connected in standard execution, with welded sleeves (DM) or fixed flanges (DF) in painted carbon steel (on request with stainless steel fittings). These expansion joints are designed to absorb angular strokes on all floors, and normally should be used in pairs or triads. We can provide certified compensators in category P.E.D.