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 ... ,LF2,LF3,Q235, Stainless steel flange- 316,304,304L,316L,3.) Type: Welding Neck, Slip-On, Blind, Plate, Thread, Socket Welding , Long ...