Intermediate frequency pushing, machine process, cold shape, hot extrusion, hot press Chemical analysis, golden element test. ITEMS :CS THREAD FLANGE 6 INCHMATERIAL: 10 ... , SCH160, XXS.TYPE: SLIP ON FLANGE (SO), WELDING ON FLANGE, BLIND FLANGE, STEEL PIPE FLANGE, WELDING NECK FLANGE (WNF), THREDED FLANGE, RF, MF, FMF, TG, FF ... :MTC EN ISO API BV SGSMOQ 100PCS ANSI 150# threaded flange