... ,316L,304H/L,321,310S,347H, ansi b16.5 class 150 weld neck flange1.specificationStandards: ANSI(ASME), AWWA, DIN, EN1092, ... F304/F304L,F316/F316L 2 LONG WN 1/2"--24" 150-2500LBS Long welding-neck A105, A350LF2,A182 F304/F304L, ... F304/F304L,F316/F316L 4 BS3293-1960 STANDARD 26"--48" 150-600LBS SO,WN A105, A350LF2,A182 F304/F304L,F316/ ... PN2.5,6,10,16,20,25,40,50,100,150,250,420 TYPE01,02,03,04,05,11,12,13, ...