Dave Dickey Forum Moderator 279 Posts
Re: What are the required changes for re-rating a mixer?27 January 2011 at 1:29pm
Without current ASME Code books, I do not have a specific answer about the required changes for re-rating. However, 316ss should not be too brittle or weak at -80 degrees F. The vessel does need to be rechecked by an ASME Code shop and re-inspected by an ASME Code inspector, with a new nameplate reflecting the lower temperature for it to be insured and used at the lower temperature. Unless the vessel is a very marginal design or has been modified, most of the re-rating should be paperwork and inspection.
The answers by this expert are based on the best available interpretation of the information provided. The consequences of the application of this information are the responsibility of the user. If clarification is needed, please submit a further question.