Minimum design metal temperature - concept
Minimum design metal temperature - concept
(OP)
What is the concept / definition of Minimum Design Metal Temperature? How can we define it for a specific design of a pressure vessel which will be installed in such a location where the minimum environment temperature is around -40ºC? My understanding is that we don't need to adopt such a low temperature as the Minimum design metal temperature of that pressure vessel in case the Minimum operating temperature will never reach it. What is the general understanding under the definitions of ASME VIII div.1 Code and EN 13.445 Code?





RE: Minimum design metal temperature - concept
EN 13445: see EN 13445-2 para 3.1.1:
Now, as to your question
An important aspect of the MDMT, or whatever you want to call it, is that it does not mean that temperature which the vessel will ever see in it's life as being the lowest temperature. However, it is that temperature that the vessel will ever see in its life, coincidental with pressure. That difference is defined very well in UG-20(b), first sentence, second line (service).
RE: Minimum design metal temperature - concept