... surface:FF ,RF, LJ, FM ,R.T.J ,R.J and so on .8Production process:raw material--cutting--heating ... 16K and 20K TypeSlip-On, Welding Neck, Blind, Socket Welding, Threaded, Lap Joint , Plate, etcFacingRF, FF, FM-M, T-G, ... the third partyApplicationchemical industry, petroleum industry, construction industry, and so onDelivery Timeusually within 25-30 days after we have ...