Page 92 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

76 Applied Process Design for Chemical and Petrochemical Plants

(table continued from precious page)

PLUG VAL YES AND COCKS STANDARD ELBOWS
Straight-Way 3-Way 90°
�
ITJ 1: 1
�
ViewX-X
aJJ cBJ

If: /3- I, If: /3-1,
K1 c 18/T K1 - 30/T STANDARD TEES
If: 13 < 1 .•. K, - Formula 6

MITRE BENDS

-< K
o· 211 Flow thru run K - 1.0 f T
15° Hr Flow thru branch
30° 8 fr K - 6o f T
45• 15 fr
60" 25 fr
75° 40 fr
90° 60 Ir
PIPE ENTRANCE
90° PIPE BENDS AND
FLANGED OR Bun-WELDING 90° ELBOWS
Inward Flush
r/d K r/d K Projedlng
/1] 1 2 20 Ir 10 30 fr o.oo- 0.5
r/d
K
12 fr 12 34 fr
[_[A 4 12 fr 14 38 Ir 0.02 0.28
3
14 Ir 16 42 fr
0.04
0.24
6
17 Ir 18 46 fr
8 24 fr 20 50 fr 0.06 0.15
0.10
0.09
0.15 & up 0.04
The resistance coefficient, K11. for pipe bends other
than qo may be determined as follows: ForK,
0
see table
( K)
Ks - (n- 1) 0.1.5 11" h2 + 0.5 + K
n = number of 90° bends
K - resistance coefficient for one 90° bend (per table)
PIPE EXIT
Projeding Sharp-Edged Rounded
CLOSE PATTERN RETURN BENDS

K - 1.0 K - 1.0 K - 1.0

By permission, Crane Co. Technical Paper #4 JO, Engineering Div., 1976.