Aluminium - flat PN10 flanges are readily available, others on request. Sizes:: Flat aluminum flanges DN ISO pipe outside diameter [mm] 15 21,3 20 26,9 25 33,7 32 42,4 40 48,3 50 60,3 65 76,1 80 88,9 100 114,3 125 129 150 168,3 Other sizes made to order! The grade you are interested in is missing here? Write to us! Contact Category: Flanges