steel plate flange Standard: ANSI B16.5, B16.47 / API 605,6A,6B / DIN 2527, ... 2528,2561,2565,2566,2573 / BS 4504 PN16,PN40 / GOST steel plate ... flange1.) Standard: ANSI B16.5, B16.47 / API 605,6A,6B / DIN ... ,304L,316L,3.) Type: Welding Neck, Slip-On, Blind, Plate, Thread, Socket Welding , Long Welding Neck, Lap Joint, Wind ...