... ,301, 304,304L,316,316L,321 and so on.Standard:GB,JIS,BS,DIN.ANSI/ASTM ,NF and Non ... standard,Size:1/2"-40"Type:Slip-on flanges, Blind flanges, Lap joint ... manufature license : manufacture license of special equipment of the P.R.C.Marking :according to client's requirement.QC staff ... with you in the near future . 300 series DIN standard forged stainless steel flange