Bellows expansion joints Rubber expansion joints NR , NBR, Neoprene, EPDM, DN25-2500MM PN10, PN16 Bellows expansion jointsComes in a variety of different compounds, which include Butyl, ... resistance Flanges: in carbon steel, galvanized and drilled acc. to DIN standards and PN pressure steps, or customized to specific requirements Bellows expansion joints