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B16.25-2003 Figure 1 Component Run Out Angle of 30 Degrees Not easibl

B16.25-2003 Figure 1 Component Run Out Angle of 30 Degrees Not easibl

B16.25-2003 Figure 1 Component Run Out Angle of 30 Degrees Not easibl

(OP)
In figure 1 of B16.25 the maximum "run out" angle is specified to be 30 degrees max.  In some instances the components I work with do not allow for this gradual runout due to interferences, particularly in the larger NPS thick wall schedules.  Engineers that I work with previously have chosen to use 45 or even 60 degree runouts in order to deal with this issue.  
Has anyone encountered this problem?  If so what was done?
How can I justify increasing this runout angle?  Any suggestions as to how to resolve this issue?

My thoughts so far are:

I am trying to find a closed form solution for the stress intensity factor at the component-weld cap intersection point for 30, 45, and 60 degree runouts.  I need to determine how much stress intensity increases as a result of these increased runout angles.  I have looked in peterson's to determine an approximate stress intensity factor for this situation, however the closest solution I could find was that for a trapezoidal protuberance on the edge of a flat bar, which obviously is not suitable for this case.


Your help in resolving this issue is much appreciated.

Thanks,
Mark

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