(40a) Properly Calculate Vessel and Piping Wall Temperatures during Depressuring and Relief

Determining if a vessel and/or piping component is going to fail under fire exposure and/or from embrittlement is an important factor for consequence analysis and risk assessment.

This paper describes detailed methods for establishing the conditions for vessel/piping failure and whether the material of construction for vessels and piping is properly selected for fire exposure and/or cold depressuring/relief.

Several case studies are used to illustrate important concepts dealing with how wall temperatures should be calculated for single and multi-phase systems in order to establish if a vessel and/or a piping component is going to fail.