... Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36,DIN 86341-2000, DIN2505materialCarbon steel(ASTM ... A105, Q235,A350LF2,A350LF3,)Stainless steel(ASTM A182 F304, F304L,F316 ... ,A705 631,632,A961, A484, Alloy steel(ASTM A694 F42,F46,F52,F56,F60,F65,F70, ... GOST12821-80); Steel Butt-Welded Flanges GOST12821-80Pressure Class:PN=0.6--PN10,0 (100 /2) ...