... used for high pressure, high or low temperature conditions.Size3/8"~160" DN10~DN4000PressureAmerican Series: CLASS 150, CLASS 300, CLASS 400 ... 3-L 4-L 5-L 6-L 7-L 8 High performance steel: A694 F 42-F 46-F 48 ... (RJ)European Series: Type A(Flat Face), Type B(RaisedFace), Type C(Tongue), Type D(Groove), Type E(Spigot), Type F(Recess), Type G(O-Ring Spigot ...