3 replies to this topic

[Vegeta]

Dears,

When we perform a hydraulic calculation of a piping system that has fittings we can use the resistance coefficient K or the equivalent length. Which one gives more accurate results? And why?

Also, is the K value independent of the flow rate and is it constant for a fitting size?

[Bobby Strain]

There are methods that correlate K with size and flow, aka 2-K and 3-K methods. And you should know the relationship between K and equivalent length.

 

Bobby

[breizh]

Vegeta ,

On top of  Bobby's comment , you should investigate using the search feature in this Forum , Katmar and Ankur  posted great info on the matter .

Good resource is Crane TP 410 Flow of fluid .

 

Breizh

[katmar]

Variations on this question come up all the time, so I wrote a general article on the subject.  It probably answers more questions than you are asking but you can easily skip the irrelevant sections. See

http://www.katmarsoftware.com/articles/pipe-fitting-pressure-drop.htm

Edited by katmar, 21 January 2015 - 01:09 AM.