Welded Low alloy Cr, Mo; for this it is required PWHT @ 700°C.
It is forseen a buttering between Cr,Mo and 625 if we want to avoid treat them together, but I was in doubt about the possibility to do it.
the heat treatment (at 700°) is not intended for the item in 625 but for the item to which it is welded to;
my concern was related to the fact that the item in 625 could be adversely affected because of this heat treatment.
If an operating pressure vessel needs to work at a higher temperature and lower pressure than the originally design,
what's the right procedure to re-rate the pressure vessel?
For PV subject to external pressure, ASME VIII div.2 gives some rules for measuring maximum deviation using a segmental circular template (4.4.4.1 - (b)).
Herein is explained how to calculate max permissible deviation and how to calculate template chord lenght. eq 4.4.8 through 4.4.13.
For...
If I have an internal head welded on a cylindrical shell and it works at a temperature higher than the design temperature of the cylindrical shell, how can I take into account for the stresses generated by the thermal expansion of the internal head?
Does exist any formula to take into account...
Fatigue curves
in Appendix 5 of ASME VIII div.2 I can find design fatigue curves for low alloy for temperature not exceeding 700°F.
If the peak of Temperature cycle exceed 700°F, what's the right approach to use?
And what's the right approach to use if the peak of Temperature cycle reach the...
I'm working with an ASME VIII div1 '07 pressure vessel where fatigue analysis is required for combined thermal and pressure cycles.
It's in my intentions to use the COSMOS program to perform this calculation.
Meanwhile I'm trying to learn what part 5 of ASME VIII div2 '07 tells about it. Can...
