One significant factor is minimum design metal temperature (mdmt), which refers to the lowest temperature at which a pressure vessel's material can withstand design stress conditions without becoming brittle or experiencing other mechanical failures. Let’s start by understanding what mdmt is; Mdmt, minimum design metal temperature, is the lowest temperature that the vessel can withstand with the chosen material and thickness.
Each pressure vessel that conforms to the asme code has its own mdmt, and this temperature is stamped on the vessel nameplate. Minimum design metal temperature or mdmt is the lowest temperature that a piping system with specified material and thickness can withstand. Mdmt is one of the design conditions for pressure vessels engineering calculations, design and manufacturing according to the asme boilers and pressure vessels code.
The mdmt is the lowest anticipated temperature that a vessel’s components might experience under various potential operating conditions. It represents the lowest permissible temperature at which a material can be safely subjected to design loads without experiencing brittle fracture.