... MATERIAL304, 304L, 316, 321, 310S, 1.4301, 1.4372, 1.4319, 1.4401, 1.4845, A105, 20#, Q235, etc(Notes ... your port. STANDARD FOR YOUR REFERENC1. ANSI B16.5 Standard flangesHG20615, HG20616, HG20617, HG20618, HG20619, HG20620 ... DIN2568,DIN2569,DIN2576,DIN2628,DIN2630,DIN2631,etc.5. BS Standard flangesEN1092-1: Type 01, Type 02, Type ... 04, Type 05, Type 11, Type 12, Type 13, Type 21 ...