2000 Hook-up Book - Spirax Sarco

More documents

Recommendations

Info

SYSTEM DESIGN 4 Sizing Steam Lines On Velocity Fig. 1 lists steam capacities of pipes under various pressure and velocity conditions. EXAMPLE: Given a steam heating system with a 100 psig inlet pressure ahead of the pressure reducing valve and a capacity of 1,000 pounds of steam per hour at 25 psig, find the smallest sizes of upstream and downstream piping for reasonable quiet steam velocities. Upstream Piping Sizing Enter the velocity chart at A for 1,000 pounds per hour. Go over to point B where the 100 psig diagonal line intersects. Follow up vertically to C where an intersection with a diagonal line falls inside the 4,000-6,000 foot-perminute velocity band. Actual velocity at D is about 4,800 feet per minute for 1-1/2 inch upstream piping. Downstream Piping Sizing Enter the velocity chart at A for 1,000 pounds per hour. Go over to point E where the 25 psig diagonal line intersects. Follow up vertically to F where an intersection with a diagonal line falls inside the 4,000-6,000 foot-perminute velocity band. Actual velocity at G is 5,500 feet per minute for 2-1/2 inch downstream piping. Pressure Drop in Steam Lines Always check that pressure drop is within allowable limits before selecting pipe size in long steam mains and whenever it is critical. Fig. 2 and Fig. 3 provide drops in Sch. 40 and Sch. 80 pipe. Use of the charts is illustrated in the two examples. EXAMPLE 1 What will be the smallest schedule 40 pipe that can be used if drop per 100 feet shall not exceed 3 psi when flow rate is 10,000 pounds per hour, and steam pressure is 60 psig? Solution: 1. Find factor for steam pressure in main, in this case 60 psig. Factor from chart = 1.5. 2. Divide allowable pressure drop by factor 3 . –. 1.5 = 2 psi. 3. Enter pressure drop chart at 2 psi and proceed horizontally to flow rate of 10,000 pounds per hour. Select pipe size on or to the right of this point. In this case a 4" main. EXAMPLE 2 What will be the pressure drop per 100 feet in an 8" schedule 40 steam main when flow is 20,000 pounds per hour, and steam pressure is 15 psig? Figure 1: Steam Velocity Chart Solution: Enter schedule 40 chart at 20,000 pounds per hour, proceed vertically upward to 8" pipe curve, then horizontally to pressure drop scale, read 0.23 psi per 100 feet. This would be the drop if the steam pressure were 100 psig. Since pressure is 15 psig, a correction factor must be used. Correction factor for 15 psig = 3.6 0.23 x 3.6 = 0.828 psi drop per 100 feet for 15 psig
15.0 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 .9 .8 .7 .6 .5 .4 .3 .2 Steam Pipe Sizing For Pressure Drop Figure 2: Pressure Drop in Schedule 40 Pipe psi 0 2 5 10 15 20 30 40 60 75 90 100 110 125 150 175 200 225 250 300 factor 6.9 6.0 5.2 4.3 3.6 3.1 2.4 2.0 1.5 1.3 1.1 1.0 0.92 0.83 0.70 0.62 0.55 0.49 0.45 0.38 Pressure Drop psi/100 ft 100 psig Saturated Steam For other pressures use correction factors 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" .1 100 200 300 400 500 1,000 2 3 4 5 10,000 2 3 4 5 6 7 8 100,000 2 3 4 5 1,000,000 2 Steam Flow lbs/hr Figure 3: Pressure Drop in Schedule 80 Pipe 100 psig Saturated Steam For other pressures use correction factors psi 0 2 5 10 15 20 30 40 60 75 90 100 110 125 150 175 200 225 250 300 factor 6.9 6.0 5.2 4.3 3.6 3.1 2.4 2.0 1.5 1.3 1.1 1.0 0.92 0.83 0.70 0.62 0.55 0.49 0.45 0.38 Pressure Drop psi/100 ft 15.0 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 .9 .8 .7 .6 .5 .4 .3 .2 350 400 500 600 0.33 0.29 0.23 0.19 24" 350 400 500 600 0.33 0.29 0.23 0.19 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24" .1 100 200 300 400 500 1,000 2 3 4 5 6 10,000 2 3 4 5 6 7 8 100,000 2 3 4 5 1,000,000 2 Steam Flow lbs/hr 5 SYSTEM DESIGN
Page 1 and 2: DESIGN OF FLUID SYSTEMS HOOK-UPS
Page 3 and 4: Spirax Sarco Spirax Sarco is the re
Page 5: Section 1: System Design Informatio
Page 8 and 9: SYSTEM DESIGN 2 The Working Pressur
Page 12 and 13: SYSTEM DESIGN 6 Sizing Superheated
Page 14 and 15: SYSTEM DESIGN 8 Draining Steam Main
Page 16 and 17: SYSTEM DESIGN 10 Draining Steam Mai
Page 18 and 19: SYSTEM DESIGN 12 Steam Tracing The
Page 20 and 21: SYSTEM DESIGN 14 Steam Tracing Sizi
Page 22 and 23: SYSTEM DESIGN 16 Steam Tracing Trac
Page 24 and 25: SYSTEM DESIGN 18 Steam Tracing A si
Page 26 and 27: SYSTEM DESIGN 20 Pressure Reducing
Page 28 and 29: SYSTEM DESIGN 22 Parallel and Serie
Page 30 and 31: SYSTEM DESIGN 24 How to Size Temper
Page 32 and 33: SYSTEM DESIGN 26 Temperature Contro
Page 38 and 39: SYSTEM DESIGN 32 Makeup Air Heating
Page 40 and 41: SYSTEM DESIGN 34 Draining Temperatu
Page 42 and 43: SYSTEM DESIGN 36 Draining Temperatu
Page 44 and 45: SYSTEM DESIGN 38 Steam Trap Selecti
Page 46 and 47: SYSTEM DESIGN 40 Steam Trap Selecti
Page 48 and 49: SYSTEM DESIGN 42 Flash Steam Flash
Page 50 and 51: SYSTEM DESIGN 44 Flash Steam Flash
Page 52 and 53: SYSTEM DESIGN 46 Condensate Recover
Page 54 and 55: SYSTEM DESIGN 48 Condensate Pumping
Page 56 and 57: SYSTEM DESIGN 50 Clean Steam Printi
Page 58 and 59: SYSTEM DESIGN 52 Clean Steam Overal
Page 60 and 61:
SYSTEM DESIGN 54 Clean Steam Figure
Page 62 and 63:
SYSTEM DESIGN 56 Testing Steam Trap
Page 64 and 65:
SYSTEM DESIGN 58 Spira-tec Trap Lea
Page 66 and 67:
SYSTEM DESIGN 60 Steam Meters Densi
Page 68 and 69:
SYSTEM DESIGN 62 Compressed Air Sys
Page 70 and 71:
SYSTEM DESIGN 64 Compressed Air Sys
Page 72 and 73:
SYSTEM DESIGN 66 Compressed Air Lin
Page 74 and 75:
SYSTEM DESIGN 68 Typical Steam Cons
Page 76 and 77:
SYSTEM DESIGN 70 Specific Heats and
Page 78 and 79:
SYSTEM DESIGN 72 Specific Heats and
Page 80 and 81:
SYSTEM DESIGN 74 Conversions To Con
Page 82 and 83:
SYSTEM DESIGN 76 Flow of Water thro
Page 84 and 85:
SYSTEM DESIGN 78 Moisture Content o
Page 86 and 87:
SYSTEM DESIGN 80 ANSI Flange Standa
Page 89 and 90:
HOOK-UP APPLICATION DIAGRAMS Sectio
Page 91 and 92:
Figure II-3 Draining and Air Ventin
Page 93 and 94:
Figure II-8 Draining Steam Main whe
Page 95 and 96:
Figure II-12 Typical Pressure Reduc
Page 97 and 98:
Figure II-16 Installation of Pressu
Page 99 and 100:
Figure II-20 Typical Pneumatic Sing
Page 101 and 102:
Condensate Return Steam Supply Stea
Page 103 and 104:
Steam Supply Steam Supply Figure II
Page 105 and 106:
Figure II-31 Temperature Control of
Page 107 and 108:
Elevated or Pressurized Return P 2
Page 109 and 110:
Figure II-39 Controlling Temperatur
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Figure II-50 Trapping Small Utensil
Page 117 and 118:
Figure II-55 Draining and Air Venti
Page 119 and 120:
Figure II-59 Air Venting and Conden
Page 121 and 122:
Evaporator Pressure Figure II-64 Dr
Page 123 and 124:
Figure II-68 Installation of Pump/T
Page 125 and 126:
Figure II-73 Draining Small Condens
Page 127 and 128:
Figure II-78 Flash Steam Recovery a
Page 129 and 130:
Figure II-80 Heating Water using Re
Page 131 and 132:
Figure II-82 Recovery of Flash Stea
Page 133 and 134:
Figure II-84 Flash Steam Condensing
Page 135 and 136:
Figure II-87 Tank Sterilization Cle
Page 137 and 138:
Steam Supply Figure II-93 Typical S
Page 139 and 140:
Figure II-97 Hand Operated Rotary F
Page 141 and 142:
Figure II-102 Freeze Proof Safety S
Page 143 and 144:
Figure II-106 Continuous Boiler Blo
Page 145 and 146:
Figure II-111 Controlling Temperatu
Page 147 and 148:
141
Page 149 and 150:
PRODUCT INFORMATION Section 3
Page 151 and 152:
Steam Traps • Balanced Pressure T
Page 153 and 154:
147
Page 155 and 156:
Subject Index Safety...............
Page 157 and 158:
Subject Index Radiation—Baseboard
Page 159 and 160:
Argentina Spirax Sarco S.A. Ruta Pa
show all

2000 Hook-up Book - Spirax Sarco

Create successful ePaper yourself

Delete template?

Save as template?