Appendix 1-4(c) is for ellipsoidal heads under internal pressure. The internal design pressure should be a positive value (your formula shows a negative pressure value... -16.801). If it really is a negative pressure, that would be a vacuum or external pressure which is handled under UG-33...
I appreciate the constructive feedback to my post. I happily accept that I was wrong about the source behind the myriad of schedules available today. I may not have been clear enough in my description of Sch.STD = Sch.40 = Sch.40S and Sch.XS = Sch.80 = Sch.80S being the same wall thicknesses. My...
thread378-416204
The poster for the original thread referenced above was trying to standardize the information contained in some internal company database for the various fittings used in their building. Part of the challenge was when to include pipe schedules as relevant information.
This...
