1) Standards: a) Design&Manufacture:API 6D,API 594,ASME B16.34 b) Face to Face: API 594,API 6D c) Connection End: ASME B16.5,ASME B 16.47 d) Test and Inspection: ISO5208,API 6D 2) Sizes: 2" - 40" or DN50 - DN1000 3) Pressure Rating: Class150 - Class1500 or PN16 - PN250 4) Material: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M, etc.