China steel flanges manufacturer Shandong AiGuo Flanges Co., Ltd supply all kinds of carbon steel flanges to markets include standards of ANSI/ASME/ASTM b16.5 Flange,DIN Flange, EN1092-1, Flange,BS Flange, UNI Flange, SANS Flange, GOST Flange , JIS Flange,AS2129 Flange etc, monthly supply flanges 1500 ton for Carbon Steel Flanges, supplying flanges size range DN15-DN2000, 1/2"-72", 15A-2000A, 15MM-2000MM, NB15-NB2000, flanges weight from 0.1kg to 2000kg, welcome to contact us for flanges inquiry and buying.