How to handle with bolts with a tensile strength < 689 MPa?
Say I have austenitic bolts like SA-193(M) Gr.B8M2 and choose material curve 2, the allowable cycles are >> 1e10,
but with high strength bolting like SA-193 B7 (curve 6) the allowable cycles are approx. 600000 with the same stress...
I have a jacketed vessel with 7 bar overpressure in the jacket and vacuum conditions in the vessel.
The nozzle in the cylindrical part is designed according to ASME VIII-1 Figures 9-5 d1) and 9-6 a).
The nozzle calculations should be performed according to UG37 etc.
The vessel wall is partly...