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.