... 5)SO,WN,SW,PL.BL,TH socket weld flange for oil Size1/2"-160"TypeWeld Neck ... ),Slip-On flange(SO),Blind flange(BL),Socket Weld flange SW), Plate flange(PL),Threaded flange ( ... FLANGE, BLIND FLANGE,HIGH HUB BLIND FLANGE,,SOCKET WELD FLANGE.LAPJOINT FLANGE, THREADED FLANGE. RING TYPE JOINT ... , 2K, 5K, 10K, 16K, 20K, 30K, 40KOur products :carbon steel ,alloy steel ,stainless steel pipes and pipe fittingslong ...