Page 99 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

Fluid Flow 85

Table 2-4
Suggested Fluid Velocities in Pipe and Tubing: Liquids, Gases, and Vapors at low/moderate pressure to 58 psig and
50" to 100°F

The velocities are suggestive only and are to be wed to approxi- The final line size should be such as to give an economical balance
mate line size as a starting point for pressure drop calculations. between pressure drop and reasonable velocity

juggested Trial iuggested Trial
Fluid Velocity Pipe Material Fluid Velocity Pipe Material
Acetylene (Observe Sodium Hydroxide
pressure limitations) 4000 fpm Steel 0-30 Percent 6 fps Steel
Air, 0 to 30 psig 4000 fpm Steel 30-50 Percent 5 fps and
Ammonia 50-73 Percent 4 Nickel
Liquid 6 fps Steel Sodium Chloride Sol'n.
Gas 6000 fpm Steel No Solids 5 fps Steel
Benzene 6 fps Steel With Solids (6 Min.-
Bromine 15 Max.) Monel or nickel
Liquid 4 fps Glass 7.5 fps
Gas 2000 fprn Glass Perchlorethylene 6 fps Steel
Calcium Chloride 4 fps Steel Steam
Carbon Tetrachloride 6 fps Steel 0-30 psi Saturated* 4000-6000 fpm Steel
Chlorine (Dry) 30-150 psi Satu-
Liquid 5 fps Steel, Sch. 80 rated or super-
Gas 2000-5000 fpm Steel, Sch. 80 heated* 6000-10000 fpm
Chloroform 150 psi up
Liquid 6 fps Copper & Steel superheated 6500-15000 fpm
Gas 2000 fpm Copper & Steel *Short lines 15,000 fpm
Ethylene Gas 6000 fpm Steel (max.)
Ethylene Dibromide 4 fps Glass Sulfuric Acid
Ethylene Dichloride 6 fps Steel 88-93 Percent 4 fps S. S.-316, Lead
Ethylene Giycol 6 fps Steel 93-100 Percent 4 fps Cast Iron & Steel,
Hydrogen 4000 fpm Steel Sch. 80
Hydrochloric Acid Sulfur Dioxide 4000 fpm Steel
Liquid 5 fps Rubber Lined Styrene 6 fps Steel
4000 fpm R. L., Saran, Trichlorethylene 6 fps Steel
Gas Haareg Vinyl Chloride 6 fps Steel
Methyl Chloride Vinylidenc Chloride 6 fps Steel
Liquid 6 fp8 Steel Water
Gas 4000 fpm Steel Average service 3-8 (avg. 6) fps Steel
Natural Gas 6000 fprn Steel Boiler feed 4-12 fps Steel
Oils, lubricating 6 fps Pump suction lines 1-5 ips Steel
Oxygen 1800 fpm Max. Maximum economi-
(ambient temp.) 4000 fpm cal (usual) 7-10 fps Steel
(Low temp.) Sea and brackish R. L., concrete,
Propylene Glycol 5 fps Steel water, lined pipe 5-8 fps 3 asphalt-line, saran-
Concrete 5-12 fps 1 (Min. !ined, transite

Note: R. L. = Rubber-lined steel

From Figure 2-3, read, f = 0.0219 = f7 1 globe valve (open), = I: K = 348 fT = 340 (0.0219)
then, pipe only friction loss: = 7.446

6 90" elbows, r/d = 1.88/1.38 = 1.36
14 = pipe, ID., in ft = 1.38/12 = 0.1150 ft

( 8 + 6 + 200) (4.29) K = 30 fT = 30 (0.0219) = 0.657
h, = 0.0219 ~-
~-
0.1150 (2)(32.%)
hf = 11.64 ft of kerosene flowing (pipe only)
For 6: 6 X 0.65'7 = 3.94
LOSS through discharge fittings, valves, connections,
using K factors using Table 2-2:
2 check valves, swing, threaded, 1100 fT = 100 (0.0219) 1 sharp edged entrance (sudden enlargement) = 1.0
= 2.19 = 4.38 1 gate valve, open, p = 1.0, K = 8 fT; K = 8 (0.0219)
(for 2) = 0.175