300#/600# RF Flanges

[danted]

Does ASME B16.5 address joining 300# to 600# RF Flanges? The bolt config. is the same upto 10".

 

[jay165]

Are you sure about that? My book has the bolt circle and bolt diameter changing @ 4" and greater. Even if you could do it, it's a bad idea. You want your spec break downstream of the flange to avoid confusion during fabrication.

 

[JeroenPh]

Jay165 is right, the bolt circle and bolt diameter are the same upto 3" and it is not common practice to bolt 300# to 600#. If a specbreak is needed you do it at a weld location on your isometric.