... ASME, ASTM, MSS, JIS, DIN, ENQuality: ISO9001-ISO2000Blind Flange Blind flanges are made of carbon steel,stainless steel and alloy steel ... or cap.We can provide a wide range of blind flanges,in accordance to standards like ASME B16.5,ASME ... DIN 2636,and so on.Size Flange: 3 / 8 "~ 100" DN10 ~ DN2500 Pressure U.S. Series: CLASS 150, CLASS 300, ... or as per customer's requirement cl150 rf blind flanges