Which surface do I measure for pressure? Answered
So this is a fairly simple question, but here it is: If you have a 5" pipe leading out of a pressurized chamber with a 6" inch disk covering the hole is the amount of pressure pushing the disk down that of 5" or 6". I am pretty sure it is 5" because it has the equivalent pressure pushing the other way outside of that diameter. Now if the 5" pipe had a bore of 5" and an outside diameter of 6" would the result be the same?