pipe fitting 1

[marBz]

what is the k resistance coefficient factor for 6 inch cross tee fitting??

tnx

 

[bimr]

Not sure if anyone has ever developed a K factor for a cross. At least it is not in the Crane Technical Paper 410. See the attachment. You can probably get by with using the K factor for the tee.

 

[marBz]

i cant find it sir,.

 

[rconner]

I think there have actually been two different (perhaps understandably) "K sub L" minor loss coefficients put forth for a "Cross". One is for "Line flow" and one for "Branch flow" through the cross (where the flow must change direction). Haestad/Bentley's "Advanced Water Distribution Modeling..." reference puts thos coefficients at 0.5 and 0.75 respectively. That being said, if you took the previous advice I don't think you'd be far off from a practical standpoint!

 

[bimr]

Click the link, the tee is shown on the 2nd page.

 

[marBz]

what is d difference between flow tru branch and flow tru run???

 

[bimr]

It is showing you that the head loss is greater when the flow turns through the tee (branch) than when the flow go straight through the tee (run).

 

[marBz]

i see.. tnx a alot sir bimr