DN b K1=K2 Bolts N.W Numble Thread kg 80 28 160 8∕4 M16?50 4.90 100* 29 180 8∕4 M16?50 6.20 100 47 180 8∕6 M16?50 8.30 125* 30 210 8∕4 M16?50 6.20 150* 36 240 8∕6 M20?60 11.20 150 31 240 8∕4 M20?60 10.60 200* 32 295 8∕6 M20?60 13.30 250 32 295 12∕8 M20?60 13.40 250* 32 350 12∕8 M20?60 17.80 300* 33 400 12∕8 M20?60 20.10 *Flange adapter DIN 2501 to standard of 1882 Material: of ductile cast iron GGG 500-EN1563 epoxy fluidized bed coating 250μm minimum coating thickness Bolts:electrogalvanized The transition from flanges of old design,no longer in compliance with the regulations,to flanges with actually binding flange standard is easily possible by mans of a flange adapter HL190.For example:4-hole to 8-hole or 6-hole to 8-hole.Transitions to other pressure stages are easily possible,too. *Flange adapter DIN 2501 to standard of 1882