life time cycles on name plates?
life time cycles on name plates?
(OP)
Hello,
do some of the Americans here knows about the lifetime cycles of a pressure vessel. We have different cycles with pressure and temperature changes, so we always do a FEM approval, that the chamber can stand at least 25000 cycles. In Europe nobody is interested in having this number whether on the name plate nor the drawings. How about the US market? I could not find it in ASME VIII, but it is big, so perhaps no wonder. Does an inspector normally ask for it? Is ASME demanding it on drawings or name plates?
Thank you, Silje
do some of the Americans here knows about the lifetime cycles of a pressure vessel. We have different cycles with pressure and temperature changes, so we always do a FEM approval, that the chamber can stand at least 25000 cycles. In Europe nobody is interested in having this number whether on the name plate nor the drawings. How about the US market? I could not find it in ASME VIII, but it is big, so perhaps no wonder. Does an inspector normally ask for it? Is ASME demanding it on drawings or name plates?
Thank you, Silje





RE: life time cycles on name plates?
Regards,
Mike
RE: life time cycles on name plates?
Or, differently, perhaps that will the specific key that DOES allow the PV to be continued in service! For example, a paint-mixing drum is cycled once per week for 32 years to change colors. Or a air recharge tank is cycled once per minute to refill a discharge drum, but is only vented once per year. Or a steam drum is shut down one a year. Averages and guesses, but at least there is something to go on.
RE: life time cycles on name plates?
RE: life time cycles on name plates?
Thank you