Jiangyin BOHON machinery flange here, manufacture SS flange with sizes from 1/2??-80?? (F304L,F316L,F316TI etc.) as well as alloy steel (904L NO4400 etc), duplex stainless steel (F51 F53 etc) , producing flanges in accordance with standard JIS, ANSI, EN, DIN, BS etc and manufacturing special flanges as per customers' drawings or samples .