Effective length of Elbows
Effective length of Elbows
(OP)
Hi,
I am looking for a online resource to get the effective length of the 90 deg and 45 deg elbows. I need it for the Material - Black Iron or Steel.
Thanks in advance...
I am looking for a online resource to get the effective length of the 90 deg and 45 deg elbows. I need it for the Material - Black Iron or Steel.
Thanks in advance...





RE: Effective length of Elbows
www.engineeringtoolbox.com/38_192.html
Both of these have some info you may find useful
RE: Effective length of Elbows
We deliver steam as if your life depends on it.
RE: Effective length of Elbows
hereafter you will find a simple method from Idelcik.
You have equivalent length for the elbows, and correction factor following their angle (K) when the ratio (r/d =1.5 )
d (mm) L_equiv (m)
25 0.35
50 0.75
75 1.18
100 1.60
125 2.05
150 2.50
175 2.93
200 3.35
225 3.76
250 4.18
275 4.59
300 5.00
325 5.40
350 5.80
375 6.20
400 6.60
425 7.08
450 7.55
475 8.03
500 8.50
angle(°) K value
0 0
15 0.35
30 0.49
45 0.63
60 0.77
75 0.9
90 1
105 1.07
120 1.15
135 1.22
150 1.28
165 1.3
180 1.35
i.e for a diameter of 100 mm , 90° : the equivalent length is
=L_equiv * K = 1.6m
hope that can help you
Pierre (design and project engineer)
RE: Effective length of Elbows
Nice table, I will add it to my calculator when I have some time.
Do you have the complete source for me?
Thanks,
CARF
http://www.carf-engineering.com/
RE: Effective length of Elbows
I've seen your pressure drop calculator.I've done some excel files with various geometries (cylindric, rectangular, diverter, blades obstacles-sinlges or multiples).
I can give you my references regarding your query :
ref :SULZER Boiler Plant Handbook, e/20.12.03 - VII.82 - 5 - Printed in Switzerland, par 8.2, fig32 & 33, p77
Pierre