... ThicknessClass150~2500Flange FacingRF(raised face) ; FF(flat face); RTJ(ring type joint); TG(tongue and groove face); MFF( male ... Lapped,Screwed,Weld Neck,Long Weld Neck,Reducing, · Spectacle,Ring JointPressure ratingclass 150LBS,300LBS,400LBS,600LBS,900LBS,1500LBS,2500LBSDimensionsANSI B16 ... X10Cr13 X8Cr17 X5CrNi189 X10CrNiTi189 X2CrNi189 X2CrNiMo1810 X10CrNiNb189 Stainless Steel Slip-on Flanges