Monday, March 30, 2009

[MW:1839] MWAP, Design Pressure, MDMT and Design Temperature

As per API 510, MAWP is defined as “The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind, earthquake, etc.”.

 

What is the designated temperature?

 

How does MWAP differ from Design Pressure?

 

Similarly, MDMT has been defined in API 510 as “The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b)).”

 

What is the difference between MDMT and Design Temperature?

 

 

Regards

 

Chandulal S Vithlani

 

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