Universal expansion joints are made by multi-layer stainless steel AISI 316 or 321, with different number of walls depending on the nominal pressure PN and connected in standard execution, with welded sleeves (UM) or fixed flanges (UF) painted carbon steel (on request with intermediate tube and fittings in stainless steel). These expansion joints are designed to absorb lateral and axial racing on all floors. We can provide certified compensators in category P.E.D .