... ,ASME 4.Type: slip on , blind , WN ,SW--Methodby forging ,forged flange --Pressure Ratingclass 150 300 600 900 1500 2500PN 6 ... back /yellow/ varnish painting or galvaizing Item#FL25 Namesteel din forged flange Range½” (15 NB) to 64” (1200NB) in 150 LBS ...