... ,304H/L,321,310S,347H, ansi b16.5 class 150 weld neck flange1.specificationStandards: ANSI(ASME), AWWA, DIN, EN1092, ... F316/F316L 3 ANSI B16.47 A(MSS SP-44) 26"--60" 150--900LBS BL,WN A105, A350LF2, A694, ... A182 F304/F304L,F316/F316L 4 BS3293-1960 STANDARD 26"--48" 150-600LBS SO,WN A105, A350LF2,A182 F304 ... /F304L,F316/F316L 5 ANSI B16.47 B(API605) 26"--60" 75--900LBS BL,WN A105, A350LF2,A182 F304 ...