ASTM A694法兰(F42的，F46的，F48的，F50的，F52的，F56的，F60的，F65的，

NameASTM A694 Flanges(F42,F46,F48,F50,F52,F56,F60,F65,F70)TypeWN(welding-neck);SO(slip-on);PL(Plate);BL(Blind);Th(Threaded);SW(scket-welding);LF/SE(lapped flange/stub end);LWN(long welding neck);Orifice flange;Reducing flange;API flange;Integral/Compact flange;Spectacle blind,Lind spade and spacer,Paddle blind,Paddle spacer;Orifice plate;Pipe plate,Bleed ring.Production Size1/2’’ 60’’FaceRF(raised face);FF(flat face);RTJ(ring type joint);TG(tongue and groove face);MFF(male and female face)Class RatingClass150 2500StandardANSIB16.5,B16.9,B16.10,B16.11,B16.28,B16.74;API,MSS-SP44,SP-75,SP95,SP-97MaterialASTM A694/A694M F42,F46,F52,F56,F60,F65,F70ASTM A694/A694MStandard Specification for Carbon and Alloy Steel Forgings for pipe Flanges,Fittings,Valves,and Parts for High-Pressure Transimission ServiceTensile Requirments & Chemical Requirements TABLE1 Tensile Requirements GradeYield Strength 0.2%Tensile StrengthElongation Offset).min.ksi(Mpa)Min,ksi(Mpa)in. or 50mm, min% F4242(290)60(415)20 F4646(315)60(415)20 F4848(330)62(425)20 F5050(345)64(440)20 F5252(360)66(455)20 F5656(385)68(470)20 F6060(415)75(515)20 F6565(450)77(415)20 F7070(485)82(565)18 TABLE2 Chemical Requirements Composition,% Heat AnalysisProduct Analysis Carbon,max0.260.265 Manganese,max1.401.44 Phosphorus,max0.0250.030 Surlfur,max0.0250.030 Silicon0.15 0.350.10-0.40