... 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 ... other equipment may be necessary.3,Types: Flat Face Flanges, Slip On, Welding Neck, Blind, Threaded , etc.4,Water , Oil, Gas, Industrial UsingDetailed ... can supply: WN, SO, BL, plate, thread, socket and other special shapes6) Kinds of forging:a) Free forgingb ...