... flange, hubbed flange Tread flange,Blind flange socket welding flange loose flange Material : 1. Carbon Steel :ASTM A105,20, Q235, 16Mn ... flange(MFM 7.with neck flange(NF) / hubbed flange 8. loose hubbed flange 9.socket welding flange(SWF) 10. Tread flange ... cover(FC) Blind flange(BF) 12.lap joint flange 13.Loose plate Fange 14.Full Face(FF) 15.Socket Rised Face ...