Flexible Flange Adaptor(For DI Pipe Only)Standard:ISO2531EN545Pressure:PN10PN16PN25Body material:Ductile iron with FBE ( fusion bonded epoxy) coating or Epoxy painting; Gaskets are NBR or EPDM;Bolts and Nuts:Carbon steel with galvanized zinc plated G4.8G8.8, or SS304SS316Package:wooden cases and protection layer.Application:Flexible flange adaptor is also dedicated flange adaptor, straight flange adaptor. It can fit ductile iron pipes only.