Dear All,

from time to time we construct (design and manufacture) vessels and valves according the ASME VIII-1 which are subject to creep rupture as they run at high temperatures. E. g. SA-351 CF8C at 730°C.

With the values given in the Section II, we can design these vessels for usually up to 100,000 h.

But to reach this 100,000 h (or even more) under safe conditions it is necessary to run and maintain these vessels properly. Now I’m looking for guidelines or rules concerning
- operation
- inspection
- service
- maintenance
- and if possible life time extension
for these vessels.
We want to use these information to advise our customer.

Can anybody give me a hint what is required in the US and where can I find proper guidelines? If you are familiar with the European norms, I’m thinking about something like the EN 13445-3 Annex M.
Thanks and regards,
Claus Grosser

For life time > 100000h there is some guidance available in this ASME document

STP-PT-024
DEVELOPMENT OF BASIC
TIME-DEPENDENT
ALLOWABLE STRESSES FOR
CREEP REGIME IN SECTION
VIII DIVISION I

Michael