5 replies to this topic

[Bayo Alabi]

Hi

I am trying to calculate the resistance coefficients (K) and/or equivalent length resistance (L_e) of valves, bends and some other ‘uncommon’ fittings (e.g. flow indicator, concentric reducer, weldolets, 90o pulled bends, diverging siamese tee, etc.) in flow lines.

The fluids flowing separately in different lines are:
1. Produced water
2. Slurry (i.e. produced water containing small amount of sand).

I have the data for valves and common fittings from “Technical Paper #409” and
“Technical Paper No. 410”, both from Crane Co.

My questions and worries are:
1. Should I include ‘uncommon’ fittings in the K or L_e calculations?
If yes, where can I find the data?
2. Where can I find industrial standards in the area of line sizing for the following cases?
i. slurry line sizing
ii. partially-filled pipe lines
iii. gravity-induced flow (e.g. condensate flowing vertically down from a vessel to a storage tank)
3. Which method is preferred - K factor or L_e?

I will appreciate relevant contributions.

Regards

waa15

[Art Montemayor]

waa:

A concentric reducer is NOT an “uncommon” fitting. Rather, it is a COMMON fitting. So is a weldolet, and a 90o elbow. I never heard of a “pulled bend” or a “diverging siamese tee”, so I don’t know what they are. I thought I had heard of every conceivable fluid flow fitting by now.

You ask:

“1. Should I include ‘uncommon’ fittings in the K or L_e calculations? If yes, where can I find the data?”

I don’t know. What kind or type of calculations are you referring to?

You find “K” or Le values in manufacturer’s or supplier’s catalogs. I have found all I need in the Internet.

I have posted various Excel workbooks with Fluid Flow data and information in these Forums in the past. Have you used the SEARCH engine?

P.S. I think Einstein said, "The important thing is to not stop questioning".

[Andree]

http://www.cheresour.../eqlength.shtml
hope this helps

[Bayo Alabi]

Andree:
Thank you for the link. I have carefully read the article and learnt some interesting things.

Art:

I thank you also for your time. In my first question, I was referring to calculation of L_e. By the way, we have chosen the L/D method.

I have also found interesting links on line sizing on the internet. However, I should by grateful if you can list some additional articles out there worth reading or links worth checking if you have them handy.

Warm regards

waa

[mangal]

Hi
I am amit mangal from india....
I required the Crane Co.,technical paper no. 410,'flow of fluid' for finding some flow corelation for tube rupture case in heat exchanger..if u have the paper please send me..
and if u have some more material related to this article please send me....
it will helpme lot.

thanks & regards
amit mangal

[gvdlans]

I required the Crane Co.,technical paper no. 410,'flow of fluid' for finding some flow corelation for tube rupture case in heat exchanger..if u have the paper please send me..

You can buy your own legal copy via http://www.flowoffluids.com/tp410.htm