... Face:FF,RF,R ASTM A350 LF2 Weld neck flange 150lb,300lb,600lb1.specificationStandards: ANSI(ASME), AWWA, DIN, EN1092, GOST, JIS ... BL,WN A105, A350LF2, A694,A182 F304/F304L,F316/F316L 4 BS3293-1960 STANDARD 26"--48" 150-600LBS SO,WN A105 ... A105, A350LF2,A182 F304/F304L,F316/F316L 7 AWWA C207 4"--144" Class B,D,E,F T/1 PL A105 ... 1.4571/DIN174402.picture ASTM A350 LF2 Weld neck flange 150lb,300lb,600lb