1) Standards:
a) Design&Manufacture:API 6D,BS 1868,ASME B16.34
b) Face to Face: API 6D,ASME B16.10,DIN 3202
c) Connection End: ASME B16.5,ASME B16.11,ASME B16.47,DIN2543-2550
d) Test and Inspection: ISO5208,API 6D,BS 6755

2) Sizes: 2" - 36" or DN50 - DN900

3) Pressure Rating: Class150 - Class1500 or PN16 - PN250

4) Material: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M, etc.