×
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

Restrictive orifice placement criteria

Restrictive orifice placement criteria

Restrictive orifice placement criteria

(OP)
I understand the upstream / downstream criteria for straight pipe when using a flow orifice set with pressure taps, but I am wondering if restrictive orifices (plates) held by regular flanges have similar criteria.

One in question is in a 10" line using CL150 RF flanges for balancing cooling water flow.

Any help on placement criteria of this type of component would be appreciated.

thanks
Mark

RE: Restrictive orifice placement criteria

You can stand a little turbulence, and probably want as much as you can generate anyway, so no.  

Pressure taps should have as little turbulence as possible.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

RE: Restrictive orifice placement criteria

(OP)
so, is it safe to say that turbulence approaching and passing through the restrictive orifice plate will not 'chew' it up?  I think the material is SS316.

thanks again

RE: Restrictive orifice placement criteria



RO's are just as sensitive to upstream downstream disturbances as flow meters especially in flow balancing, but because flow balancing is not a precise business anyway, use the 10 up/ 5 down rule as a minimum



 

RE: Restrictive orifice placement criteria

I agree.  I was thinking max pressure drop, having forgot about your flow balancing application request.
Thanks for the correction hacksaw!

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

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