... as 201,301, 304,304L,316,316L,321 and so on.Standard:GB,JIS,BS,DIN.ANSI/ASTM ... neck flanges, Spectacle flanges,TG flanges,Socket welding flanges and Threaded flanges. Pressure ratings :class:150 300 400 ... to client's requirement.QC staff :10-15 .Inspection :in-house and the third party.Our objective:Survival by ... have received a good reputation from our new and old customers whose do business with us .we ...