Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

Calculate Restriction Orifice Thickness


This topic has been archived. This means that you cannot reply to this topic.
6 replies to this topic
Share this topic:
| More

#1 kv.balu

kv.balu

    Junior Member

  • Members
  • 15 posts

Posted 19 October 2014 - 10:26 AM

Hi all

 

I am trying to calculate the thickness of a Restriction Orifice Plate for higher Pressure drops (about 14 kg/sqcm pressure drop). Request you to share the calculation formulae for calculating the required thickness (Material of Plate is SS316).  I have the Miller equation (from Flow measurement Engineering handbook), but want some more data on the thickness calculation requirements if the

a) Plate were to be Bolted between flanges

B) Plate was inserted between flanges.

 

I believe that the thickness requirements would be different in the cases above when the calculation is done using Roark's formulae.  Kindly share the formulae for both the cases.

 

 

 

 



#2 breizh

breizh

    Gold Member

  • Admin
  • 6,292 posts

Posted 19 October 2014 - 09:40 PM

http://www.madinstro...ch/opthick.html

Consider this document and the Zip file associated . You may find answer to your query.

Hope this helps

Breizh

#3 kv.balu

kv.balu

    Junior Member

  • Members
  • 15 posts

Posted 19 October 2014 - 10:23 PM

Thanx breizh for the link.  I shall revert back.

 

Balu



#4 Ajay S. Satpute

Ajay S. Satpute

    Gold Member

  • Members
  • 177 posts

Posted 19 October 2014 - 11:23 PM

Balu,

 

Attached file may also be of your use (to cross-check your calculations).

 

 

Regards.

 

Ajay S. Satpute

Attached Files



#5 kv.balu

kv.balu

    Junior Member

  • Members
  • 15 posts

Posted 20 October 2014 - 03:31 AM

Thanx Satpute.  How do I calculate the permanent Pressure loss across the orifice.  Is this value higher than the required Pressure differential across the Plate.

 

I have used the calculations provided by Breizh earlier in this topic thread and the thickness is higher than the value interpolated from the graph in your pdf file. I understand the the formulae used in Breizh's link is conservative.

 

Is there a way to know what would be the permanent pressure loss? Could you throw some light on the calculation for the same?



#6 Ajay S. Satpute

Ajay S. Satpute

    Gold Member

  • Members
  • 177 posts

Posted 20 October 2014 - 05:35 AM

Balu,

 

Please google for the permanent pressure loss query. Detailed answers are available there.

 

What's the difference in values (thk) between calculated and graph?

 

 

 

Regards.

 

Ajay S. Satpute



#7 kv.balu

kv.balu

    Junior Member

  • Members
  • 15 posts

Posted 20 October 2014 - 10:33 AM

Satpute,

 

The difference is not much, inconsequential. I reviewed my calculations again for various beta ratios.  I had also made the correction in the Yield stress for Orifice plate for Flow temperature. I believe that the graph in your pdf is for ambient temperatures and hence the difference.  Thanx for your valuable feedback.






Similar Topics