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