B16.5 Missing Tolerancing

[BigTank]

Is there an 'industry-standard' accepted tolerance for concentricity between the bolt circle and a slip-on flange I.D.? I cannot find this in B16.5, implied or otherwise. This would be a very useful tolerance for those concerned with fit, and those tolerancing an assembly that uses B16.5 flanges. (Read: Why does it seem this tolerance isn't set by ASME?!)

--------------------------------
Fitter, happier, more productive

 

[trottiey]

Does section 7.8.3 help? Isn't the slip-on flange ID the same as the facing ID?

 

[BigTank]

It appears as if you're right, trottiey. (Interesting name, btw.) I missed the 's' on 'diameters' when I was reading. I would assume that 'diameters' being plural would refer to both the facing OD and ID.

Thanks!

--------------------------------
Fitter, happier, more productive