Although you do not specify which ASME , I doubt if structural parts are designed according any ASME . ASME Codes deal with pressure parts.
API 530/560 used for refinery heaters gives you the option to design for shorter as well as longer than 100.000 hrs as well as short term conditiond at higher temperatures.(E.g. during decoking).
ASME 1 and ASME VIII-1 only use 100.000 hrs with a max. allowable temperature.