Minimum design metal temperature MDMT

The vessel is determined to be an uninsulated, horizontal, grade-level, cylindrical pressure vessel with a gas volume of 706 ft3 (20 m3). The vessel has a MAWP of 1,480 psig (102 bar) at 650°F (343°C) and a Minimum Design Metal Temperature (MDMT) of 40°F (4°C) since it is constructed of unnormalized steel material. Due to process conditions immediately prior to pressuring the vessel to 1,000 psig (69 bar), the vessel s metal temperature is approximately 30°F (-1°C). When the vessel is pressurized to 1,000 psig, it fails catastrophically. The distances to overpressure endpoints (1, 3, and 5 psig) are calculated as follows ... 

Impact tests are not required when the Intersection of minimum design metal temperature (MDMT) and nominal material thickness lies on or above the applicable material curve in Figure UCS-66 however, impact testing is mandatory for the following ... 

Minimum Design Metal Temperature (MDMT) The MDMT is an ASME Code requirement and must be stamped on the nameplate, the lower of the following ... 

Other information pump type, required punip hydraulic horsepower, material of oonstritction, stress relief requirement, project pump specifications, pump position (vertical, horizontal, or inline), available utility such as cooling water, site conditions, pump location indoor or outdoor), minimum design metal temperature (MDMT), insulation requirement, steam out condition, etc. 

Others Project vessel specifications, site conditions, any hazardous nature of the process fluid in vessel, steam Out condition, minimum design metal temperature (MDMT), which is the minimum ambient temperature... 

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