steel plate flange Standard: ANSI B16.5, B16.47 / API ... 2566,2573 / BS 4504 PN16,PN40 / GOST steel plate flange1.) Standard: ANSI B16.5, B16.47 / ... LF3,Q235, Stainless steel flange- 316,304,304L,316L,3.) Type: Welding Neck, Slip-On, Blind, Plate, Thread, Socket Welding ... , Long Welding Neck, Lap Joint, Wind Tower , etc4.) Process: Free forging, Plate cutting5.) ...