... : ASME, ANSI, API, JIS, JPI, SLIP-ON FLANGES continue to be preferred to welding neck flanges ... many users on account of their initially lower cost, the reduced accuracy required in cutting the pipe to ... ANSI, JIS, DIN, and UNI.2,Flanges are the connectors used in process piping to connect pipe to ... may be necessary.3,Types: Flat Face Flanges, Slip On, Welding Neck, Blind, Threaded , etc.4,Water , ...