Page 90 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

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.