×
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

FRP (GRP) piping optimum design velocity

FRP (GRP) piping optimum design velocity

FRP (GRP) piping optimum design velocity

(OP)
  FRP piping optimum design velocity, does anybody can  recomend?

RE: FRP (GRP) piping optimum design velocity

FRP piping optimum design velocity??

I can’t help with an answer to your question; however, even if I had an extensive working knowledge of fiberglass reinforced plastic pipe, I still could not answer your question because it is not specific enough.  
 
Optimized for what?
    Lowest first cost?
    Lowest life cycle cost?
    Installation with unskilled labor?
    Reliability?
    Fastest installation time?
    Or some combination of the above?

After it is determined what a design should be optimized for, the following information may need to be considered:
     Design Temp
     Design Pressure
     Length of pipe
     Fluid properties    
     Flow
     Cost of power for pumping
     Cost of pump stations
     Cost of piping material
     Labor cost for fabrication and installation
     Design life
     Engineering costs
     Etc.

A 100 ft line would not warrant a detailed analysis of the above; however, a 100 mile line would.  From my perspective, a lot of information needs to be considered before an optimum design velocity can be established.
  

RE: FRP (GRP) piping optimum design velocity

(OP)
The usual way to select a diameter for a process line with a given flow is  by starting with a given optimum economical velocity, and selecting the  diameter with :
D = Square root ( Flow*4/Pi*Vec ).
Common carbon steel economical velocities are between 1,5 m/s and 2,5 m/s.But FRP is more expensive than c.s.,so its design velocity should be higher.
I agree that is required a lot of information to get the result.I was only trying to get  the information in a direct way to avoid  a long calculation.
Any way, thank you for your comments.

Regards,

Split

RE: FRP (GRP) piping optimum design velocity

Actually that is my question too.
I used Generaux formula to get IDopt, But I need price of FRP pipes in terms of this formula:
Price($)=A*D^n Where D is diameter
If you dont know about Generaux, it is a formula based on cpital investment of piping and pump ,and operating cost of system,caused by electerical consumption of pump.

RE: FRP (GRP) piping optimum design velocity

"SPLIT (Mechanical)  
The usual way to select a diameter for a process line with a given flow is  by starting with a given optimum economical velocity, and selecting the  diameter with"
 
Doesn't the economical velocity alsodepend on pipe diameter?

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