steel plate flange Standard: ANSI B16.5, B16.47 / API 605,6A, ... ,2528,2561,2565,2566,2573 / BS 4504 PN16,PN40 / GOST steel plate flange1.) Standard: ANSI B16.5, B16.47 / API 605,6A ... Welding Neck, Lap Joint, Wind Tower , etc4.) Process: Free forging, Plate cutting5.) Package: used in wooden cases, wooden pallets ............. steel plate flange