ASME Sec. VIII, Div. 1, Short Term Up-set Condition 1

[StaticPressure]

ASME VIII, Div. 1 defines Design Temperature and Pressure as T and P that shall not be less than the highest Temperature and Pressure in the most severe operating condition. Some people interpret it in a way that in the short term upset condition, P and T can be higher than Design Pressure and Temperature. Does any body know whether code has any definition for “short term”, or “up-set condition”, or any rules or regulation for short term upset condition? I appreciate any kind of help.

 

[rustbuster]

It is the responsibility of the owner to report such occurences to the regulator and should include a fitness for service assessment to ensure continued safe operation. ASME is only for new construction, API as well as others have guidelines to assist in such cases.

 

[TGS4]

While B31.3 does have exactly what you are looking for, VIII-1 explicitly does not.

As rustbuster says, if you exceed, you are in a FFS situation. Perhaps some other members here can elaborate if ASME PCC has anything to say about this.

 

[jte]

Static-

Question: For Section VIII, Division 1 vessels, is it required to consider the most severe condition
of coincident pressure and temperature expected in normal operation including abnormal conditions which may become a governing design condition?

Reply: Yes. See UG-2(a), UG-20, and UG-21.

Reasonably anticipated upset conditions count.

See also thread794-186287 and thread794-258873

PCC does not address this as far as I know.

jt

 

[StaticPressure]

Thanks everyone. So for ASME Sec. VIII, Div. 1 vessel, DT and DP shall include all possible condition in the life time of the vessel including short term upset condition.