Page 89 - Applied Process Design for Chemical and Petrochemical Plants Volume I

76 Applied Process Design for Chemical and Petrochemical Plants

(table continuedfrom previous pagej
PLUG VALVES AND COCKS STANDARD ELBOWS

Straight-Way 3-Way 90" 45"
0
View X-X

If: /? = I, If: 6 = I, If: 0 = I,
Ki = 18fT Ki - 3OfT Ki = WfT STANDARD TEES
If: 0 < I. . . Kz = Formula 6

MITRE BENDS kmd
.- . a
tcdl

Flow thru run. . . . . . . K - 20 fT
Flow thru branch. . . . K = 60 fT
15 fr
25 fr
Vd

PIPE ENTRANCE
90" PIPE BENDS AND
c
FLANGED OR BUTT-WELDING 90" ELBOWS Inward Flush

Projecting

12fr 14 386
4 14fr 16 42fr
17fr 18 46f1 0.06
8 24 fr 20 50 fr
The resistance coefficient, KD, for pipe bends other K = 0.78
For K,
than 90' may be determined as follows: *Sharp-edged see table
r
KB = (n- I) (0.25 ?r fi;i+o.5 K
n = number of 90" bends
K = resistance coefficient for one 90' bend (per table)
PIPE EXIT
Proiecting Sharp-Edged Rounded
CLOSE PATTERN RETURN BENDS

K - 1.0 K - 1.0 K - 1.0

By permission, Crane Co. Technical Paper #410, Engineering Div., 1976.