×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

definition of MDMT value. how to find the right value for mdmt?

definition of MDMT value. how to find the right value for mdmt?

definition of MDMT value. how to find the right value for mdmt?

(OP)
goodmorning,

i 've some doubt about how a mdmt for a plant is calculated.
generally the client specifies the MDMT in his specifications, in this case we don't have any information about mdmt needed to design the  equipments.
what informations we need to define MDMT?
the only parameter that we have in our hand is the minimum temperature of dry bulb, but we don't know if this value of temperature is the average of one day, week or month...Can you help me? Thank you. have a nice day.

Chri

RE: definition of MDMT value. how to find the right value for mdmt?

ChriChri81;
You need to ask the client for temperature extremes regarding exposure to equipment and process conditions. You cannot guess at this.

RE: definition of MDMT value. how to find the right value for mdmt?

The Client, the Engineer (Process) and Jurisdiction (possibly) must provide the MDMT, assumming that you are the Manufacturer of a specific engineered pressure item.   

RE: definition of MDMT value. how to find the right value for mdmt?

(OP)
NO, i'm not Stan; We have "white paper" to define the MDMT for all the equipments.  

RE: definition of MDMT value. how to find the right value for mdmt?

I assume then that you are the Engineer for the Owner and are responsible for determining the MDMT. The MDMT of a full scale operating facility need not be the least mean ambient condition unless the Jurisdiction requires that it be.  

RE: definition of MDMT value. how to find the right value for mdmt?

ChriChri81
There is something confusing with your OP. You have a white paper that what....defines what is MDMT? This is in most Codes of Construction.

You as the Engineer must decide on an appropiate MDMT and be able to defend it. The Juridiction may review your selection but they will not provide you with this information. You are on your own. If necessary seek help with this, it sounds like you are in over your head with PV design.

RE: definition of MDMT value. how to find the right value for mdmt?

On the basis of different cases/options, process simulations will be highlighted the Minimum Temperature of the process stream. For example, Blowout case is the stringent case for the minimum temperature of the stream that will pass through the associated equipments (like pressure vessel, piping etc) especially in oil & gas era and another instance is the minimum temperature of process stream of Refrigeration package etc. By the help of this input we can primarily select the material of equipment. Then after, further analysis/calculation of the equipment according to ASME Section VIII Div-1, ASME B31.3 etc, we can address the exact MDMT of the equipment.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources