Pipe dimensioning

[giuman]

Hello everyone!
I'm involved in industrial water plants and I would like to know the following points:

- given the P&ID, how to design pipe diameter (rating, DN, schedule...) given some input data (I think the flow or the the pressure)
- what represents phisically the rating of a flange/pipe/valve

Sorry for the simple questions but I'm very new in the field.
Thanks in advance
Giuman

 

[JGard1985]

Look to a line specification...essentially a cookbook of flange, valve ratings and pipe schedules, and materials that are sufficient for your stated service and pressure. Each plant/system will typically have a line specification for a given service

Jeff
Pipe Stress Analysis
Finite Element Analysis

http://www.xceed-eng.com

 

[pennpiper]

giuman (Industrial)(OP)
You wrote:
"I'm involved in industrial water plants"
What do you mean "Involved in"?
= Are you an operator?
= What is your age?
= What is your Education and Training?
= How many years have you been doing this?

You wrote"
"given the P&ID,"
What do you mean by this, do you actually have a P&ID or not? In the Process Plant Engineering and Design world, if you have a P&ID then you would only need to know how to read the symbols and notes on the P&ID. A P&ID is normally created by a Chemical Process Engineer.

You wrote"
"how to design pipe diameter (rating, DN (size), schedule...) given some input data (I think the flow or the the pressure)
= Are you suggesting that there is no information related to a pipe line on the P&ID?
= All lines on a P&ID should have a Line Number, A Line Class code (Piping Material Line Class Specifications (PMLCS), which refers to the pipe material) then the Line size.
= Depending on the Plant location there may also be codes indicating Insulation or tracing

You wrote"
what represents physically the rating of a flange/pipe/valve
= The rating for Flanges (for equipment and Valves) is included in the PMLCS
= Valve "Types are indicated by a industry wide standard Symbol ( You can look it up on the internet

On the internet, look up the following:
P&ID
Piping
Pipe Valves
Piping Flanges
industrial water plants

Regards,


Sometimes its possible to do all the right things and still get bad results

 

[LittleInch]

giuman,

Basically you need to have a good conversation with your / a process engineer who does all these things for a living.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[giuman]

Ok, I sincerely thank everyone

Regards