... ,Lap Joint and Plate ect.Pressure Ratings:Class 150,300,600,900,1500 and 2500Pressure Rating:PN6,PN10 ... Type Material 1 ANSI B16.5 1/2"--24" 150-2500LBS BL,SO,SW,LJ,WN,THDA105, A350LF2, ... ,F316/F316L 2 LONG WN 1/2"--24" 150-2500LBS Long welding-neck A105, A350LF2,A182 F304/ ... ,F316/F316L 4 BS3293-1960 STANDARD 26"--48" 150-600LBS SO,WN A105, A350LF2,A182 F304/F304L, ... 4404 1.4541 1.4571/DIN17440 WN FLANGES