... " 3.150-2500LB 4.Blind, Weld Neck, Slip On, Threaded, Socket Welding,Lap Joi ANSI B16.5 Forged Pipe Flanges1. Standard ... : ANSI B16.52. Type: Blind, Weld Neck, Slip On, Threaded, Socket Welding,Lap Joint 3. Size: 1/2" - 72"4. Material ... Case or as per customers' requirements ANSI B16.5 pipe flange