You do not need to stamp a pressure vessel if the internal/external design pressure is less than 15 psi (U-1(c)(2)), but it does not mean that you should not perform a design calculation. As soon as there is over/under pressure it’s MF responsibility to assure that the vessel is safe.
I checked it and found that compress does not consider a hydro head neither for shell nor for head in the calculation for MAP. IMO the reason is not existing official Code definition of MAP. If you need it for the calculation of the hydro pressure UG-99(c) than the base is “calculated test...
You cannot use joint efficiency factor in an App.2 calculation, since there is no any mentioned. Of course if you want, you can reduce the allowable stress for the flange to be conservative, but you do not need to. If the flange is 3,25” thick made of ferritic steels you’ll need to perform 100%...
Hi gr2vessels,
I know that the calculation of UG-99(c) is optional and there is nothing wrong with this paragraph. In my opinion it is wrong to calculate UG-99(c) with 1,3*MAP. According to Code, the test pressure UG-99(c) shall be calculated using 1,3 * “basis for calculated test pressure as...
Hi,
Compress and as I know other PV computer programs use for the calculation of test pressure according to UG-99(c) the term MAP, which is in my opinion wrong. The Code tells that “basis for calculated test pressure as defined in 3-2” shall be used and not the MAP. App. 3-2 says that ”basis...