11f Piping Design Steam Condens.75130431

7/21/2019 11f Piping Design Steam Condens.75130431

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Skidmore, Owings + Merrill, LLP Varkie C. Thomas, Ph.D., P.E. IBM-AES Piping Software Ref-Data

STEAM PRESSURE CLASSIFICATION AND PIPE SIZING DESIGN CRITERIA MEDI

PipeSize

0.50

0.75

1.00

1.25

1.50

2.00

LOW PRESSURE STEAM PIPE SIZING CRITERIA : Flow Rates of Steam (lbs/hr) 2.50

3.00

3.50

4.00

Pipe 1/16 1/8 1/4 1/2 3/4 1 2 1/16 1/8 1/4 1/2 3/4 1 2 5.00

Size 0.063 0.125 0.25 0.5 0.75 1.0 2.0 0.063 0.125 0.25 0.5 0.75 1.0 2.0 6.00

0.75 9 14 20 29 36 42 60 11 16 24 35 43 50 73 8.00

1.0 17 26 37 54 68 81 114 21 31 46 66 82 95 137 10.00

1.25 36 53 78 111 140 162 232 45 66 96 138 170 200 280 12.00

1.5 56 84 120 174 218 246 360 70 100 147 210 260 304 430 HIGH

2.0 108 162 234 336 420 480 710 134 194 285 410 510 590 850

2.5 174 258 378 540 680 780 1150 215 310 460 660 820 950 13703.0 318 465 660 960 1190 1380 1950 380 550 810 1160 1430 1670 2400 Pipe

3.5 462 670 990 1410 1740 2000 2950 550 800 1218 1700 2100 2420 3450 Size

4.0 640 950 1410 1980 2450 2880 4200 800 1160 1690 2400 3000 3460 4900 0.50

5.0 1200 1680 2440 3570 4380 5100 7500 1430 2100 3000 4250 5250 6100 8600 0.75

6.0 1920 2820 3960 5700 7000 8400 11,900 2300 3350 4850 5700 8600 10,000 14,200 1.00

8.0 3900 5570 8100 11,400 14,500 16,500 24,000 4800 7000 10,000 14,300 17,700 20,500 29,500 1.25

10.0 7200 10,200 15,000 21,000 26,200 30,000 42,700 8800 12,600 18,200 26,000 32,000 37,000 52,000 1.50

12.0 11,400 16,500 23,400 33,000 41,000 48,000 67,800 13,700 19,500 28,400 40,000 49,500 57,500 81,000 2.00

2.50

3.00

Pipe Slope (in. / 10 ft) 1 1 2 2 3 4 5 3.50

Pressure Drop (psi / 100 ft) 0 0 1 1 1 1 2 4.00

5.00

6.00

8.00

10.00

12.00

Medium:15 to 30 psig

High:150 to 250 psig

High:30 to 150 psig

Maxim Veloc

Class

Pressure Classifications

Low:0 to 15 psigVacuum:Less than 0 psig

Pressure Initial Steam Sizing Criteria Maxim System

10,000

10,000

4,000

4,000

6,000

8,000

2

2

(ft/min)

Medium

High

0.25

0.5

1

3.5

0.75

1

7.5

Press (psig) (psi/100ft) PD (psig)Low

Low

3.5

12

30

50

Sizing Criteria: PD (psi) per 100 feet of Pipe Sizing Criteria: PD (psi) per 100 feet of Pipe

10

High

High

20

25

Initial Steam Saturation Pressure = 3.5 psig Initial Steam Saturation Pressure = 12 psig

100

150

Steam and Condensate Steam 11f - Piping-Design - Steam-Condens.xlsx


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M PRESSURE STEAM PIPE SIZING CRITERIA : Flow Rates of Steam (lbs/hr) PROPE

Press

1/8 1/4 1/2 3/4 1 2 Pipe 1/8 1/4 1/2 3/4 1 2 psig0.125 0.25 0.5 0.75 1.0 2.0 Size 0.125 0.25 0.5 0.75 1.0 2.0 0

7 10 14 17 19 28 0.50 8 12 17 21 25 35 1

16 22 32 39 45 64 0.75 20 28 40 49 57 81 2

32 45 64 79 91 129 1.00 40 57 81 100 115 163 3

70 99 142 174 202 283 1.25 89 127 179 219 253 358 4

110 156 220 270 312 440 1.50 139 197 279 342 395 558 5

223 316 446 546 630 892 2.00 282 282 565 691 800 1,130 6

368 520 735 900 1,040 1,472 2.50 465 660 930 1,140 1,318 1,860 7

675 953 1,340 1,652 1,905 2,690 3.00 853 1,205 1,690 2,090 2,410 3,410 8

990 1,405 2,010 2,470 2,850 4,020 3.50 1,275 1,800 2,550 3,120 3,605 5,090 9

1,420 2,020 2,850 3,490 4,025 5,700 4.00 1,800 2,550 3,610 4,462 5,100 7,220 10

2,625 3,720 5,260 6,450 7,450 ###### 5.00 3,320 4,710 6,660 8,150 9,440 ###### 11

4,315 6,100 8,650 ###### ###### ###### 6.00 5,475 7,725 11 ###### ###### ###### 12

9,000 ###### ###### ###### ###### ###### 8.00 ###### ###### ###### ###### ###### ###### 13

16,400 23,200 33,300 40,250 46,500 65,750 10.00 20,800 29,400 41,500 51,000 58,900 83,250 14

26,350 37,250 52,500 64,500 74,500 105,500 12.00 33,300 47,100 66,700 81,750 94,500 133,200 15

RESSURE STEAM PIPE SIZING CRITERIA : Flow Rates of Steam (lbs/hr) 16

17

181/2 3/4 1 2 5 Pipe 1/2 3/4 1 2 5 19

0.5 0.75 1.0 2.0 5.0 Size 0.5 0.75 1.0 2.0 5.0 20

21 26 30 43 68 0.50 23 29 33 47 75 21

50 61 70 99 160 0.75 54 66 77 109 172 22

100 120 140 200 320 1.00 109 134 155 220 347 23

220 270 310 440 690 1.25 241 296 341 483 764 24

340 420 480 680 1,080 1.50 375 460 532 751 1,185 25

690 850 980 1,390 2,190 2.00 760 930 1,075 1,520 2,410 30

1,140 1,400 1,620 2,280 3,610 2.50 1,250 1,535 1,775 2,550 3,960 35

2,090 2,560 2,960 4,180 6,610 3.00 2,280 2,815 3,245 4,590 7,260 40

3,120 3,830 4,420 6,250 9,870 3.50 3,430 4,200 4,850 6,850 ###### 45

4,420 5,420 6,260 8,840 ###### 4.00 4,840 5,930 6,850 9,700 ###### 50

8,170 ###### ###### ###### ###### 5.00 8,950 ###### ###### ###### ###### 55

###### ###### ###### ###### ###### 6.00 ###### ###### ###### ###### ###### 60

###### ###### ###### ###### ###### 8.00 ###### ###### ###### ###### ######

50,970 62,500 72,230 101,900 161,100 10.00 56,000 68,500 79,100 112,000 177,000

81,810 100,300 115,900 163,600 258,500 12.00 89,900 110,200 127,100 179,600 284,100


Initial Steam Saturation Pressure = 30 psig Initial Steam Saturation Pressure = 60 psig


Initial Steam Saturation Pressure = 30 psig Initial Steam Saturation Pressure = 60 psig



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RTIES OF STEAM PROPERTIES OF STEAM

Temp Volume Press Temp Volume

deg F cuft Liquid Latent psig deg F cuft Liquid Latent212 26.8 180.1 970.3 65 311.8 5.49 281.8 901.3

215.5 25.13 183.6 968.1 70 316.4 5.18 286.2 898

218.7 23.72 186.8 966 75 320.1 4.91 290.4 894.8

221.7 22.47 189.8 964.1 80 323.9 4.66 294.4 891.9

224.5 21.35 192.7 962.3 85 327.6 4.44 298.2 899

227.3 20.34 195.5 960.5 90 331.2 4.24 301.9 886.1

229.9 19.42 198.2 958.8 95 334.6 4.06 305.5 883.3

232.4 18.58 200.7 957.2 100 337.9 3.89 308.9 880.7

234.9 17.81 203.2 955.6 105 341.1 3.74 312.3 878.1

237.2 17.11 205.6 954.1 110 344.2 3.59 315.5 875.5

239.5 16.46 207.9 952.5 115 347.2 3.46 318.7 873

241.7 15.86 210.1 951.1 120 350.1 3.34 321.7 870.7

243.8 15.31 212.2 949.7 125 352.9 3.23 324.7 868.3

245.9 14.79 214.3 948.3 130 355.6 3.12 327.6 865.9

247.9 14.31 216.4 946.9 135 358.3 3.02 330.4 863.7

249.8 13.86 218.3 945.6 140 360.9 2.93 333.1 861.5

251.7 13.43 220.3 944.3 145 363.4 2.84 335.8 859.3

253.6 13.03 222.2 943 150 365.9 2.76 338.4 857.2

255.4 12.66 224 941.8 155 368.3 2.68 340.9 855257.1 12.31 225.7 940.6 160 370.6 2.61 343.4 853

258.8 11.98 227.5 939.5 165 372.9 2.54 345.9 850.9

260.5 11.67 229.2 938.3 170 375.2 2.47 348.3 848.9

262.2 11.37 230.9 937.2 175 377.4 2.41 350.7 846.9

263.8 11.08 232.5 936.1 180 379.5 2.35 353 845

265.4 10.82 234.1 935 185 381.6 2.3 355.2 843.1

266.9 10.56 235.6 934 190 383.7 2.24 357.4 841.2

274.1 9.45 243 928.9 195 385.8 2.19 359.6 839.2

280.7 8.56 249.8 924.2 200 387.8 2.13 361.9 837.4

286.8 7.83 256 919.8 210 391.7 2.04 366 833.8

292.4 7.2 261.8 915.7 220 395.5 1.95 370.1 830.3

297.7 6.68 267.2 911.8 230 399.1 1.88 374.1 826.8

302.7 6.23 272.4 908.1 240 402.7 1.81 377.8 823.4

307.3 5.83 277.2 904.6 250 406.1 1.74 381.6 820.1

Enthalpy btu/lbEnthalpy btu/lb



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Pr. Drop (psi/100) sizing criteria for open gravity (sloped pipe) condensate return

CONDENSATE FLOW RATE (lbs/hr) Condensatee Return Pressure = 0 psig

Pipe Pipe Pipe

Size 16-Jan 4-Jan 1 Size 16-Jan 4-Jan 1 Size 16-Jan 4-Jan 1

0.063 0.25 1.0 0.063 0.25 1.0 0.063 0.25 1.0

0.5 240 520 1100 0.5 95 210 450 0.5 60 130 274

0.75 510 1120 2400 0.75 210 450 950 0.75 130 280 590

1.0 1000 2150 4540 1.0 400 860 1820 1.0 250 530 1120

1.25 2100 4500 9500 1.25 840 1800 3800 1.25 520 1110 2350

1.5 3170 6780 14,200 1.5 1270 2720 5700 1.5 780 1670 3510

2.0 6240 13,300 a 2.0 2500 5320 a 2.0 1540 3270 a

2.5 10,000 21,300 a 2.5 4030 8520 a 2.5 2480 5250 a

3.0 18,000 28,000 a 3.0 7200 15,200 a 3.0 4440 9360 a

4.0 37,200 78,000 a 4.0 14,900 31,300 a 4.0 9180 19,200 a

6.0 110,500 a a 6.0 44,300 a a 6.0 27,300 a a

8.0 228,600 a a 8.0 91,700 a a 8.0 56,400 a a

Pipe Pipe Pipe

Size 16-Jan 4-Jan 1 Size 16-Jan 4-Jan 1 Size 16-Jan 4-Jan 1

0.063 0.25 1.0 0.063 0.25 1.0 0.063 0.25 1.0

0.5 42 92 200 0.5 28 62 133 0.5 23 51 109

0.75 91 200 420 0.75 62 134 290 0.75 50 110 230

1.0 180 380 800 1.0 120 260 544 1.0 100 210 450

1.25 370 800 1680 1.25 250 540 1130 1.25 200 440 930

1.5 560 1200 2520 1.5 380 810 1700 1.5 310 660 1400

2.0 1110 2350 a 2.0 750 1590 a 2.0 610 1300 a

2.5 1780 3780 a 2.5 1200 2550 a 2.5 980 2100 a

3.0 3190 6730 a 3.0 2160 4550 a 3.0 1760 3710 a

4.0 6660 13,800 a 4.0 4460 9340 a 4.0 3640 7630 a

6.0 19,600 a a 6.0 13,200 a a 6.0 10,800 a a

8.0 40,500 a a 8.0 27,400 a a 8.0 22,400 a a

Pipe Pipe

Size 16-Jan 4-Jan 1 Size 16-Jan 4-Jan 1

0.063 0.25 1.0 0.063 0.25 1.00.5 56 120 260 0.5 43 93 200

0.75 120 260 560 0.75 93 200 420

1.0 240 500 1060 1.0 180 390 800

1.5 750 1600 3,320 1.5 570 1210 2500

2.0 1470 3,100 6450 2.0 1120 2350 4900

2.5 2,370 5,000 10,300 2.5 1800 3780 7800

3.0 4,230 8,860 a 3.0 3200 6,710 a

4.0 8,730 18,200 a 4.0 6,620 13,800 a

6.0 25,900 53,600 a 6.0 19,600 40,600 a

8.0 3,400 ####### a 8.0 40,500 83,600 a

Supply Steam @ 200 psig Supply Steam @ 2150 psig

PD (psi per 100 feet) PD (psi per 100 feet)

Supply Steam @ 150 psig

PD (psi per 100 feet) PD (psi per 100 feet) PD (psi per 100 feet)

Supply Steam @ 50 psig Supply Steam @ 100 psig

PD (psi per 100 feet) PD (psi per 100 feet)

Supply Steam @ 5 psig Supply Steam @ 15 psig Supply Steam @ 30 psig

PD (psi per 100 feet)

Steam and Condensate Steam-Condns 11f - Piping-Design - Steam-Condens.xlsx


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STEAM Pipe Sizing Chart Schedule 40 Steel

Figure 17: Steam Flow Rates @ Pressures and Velocities for Schedule 40 Pipe Source: ASHRAE

Example: 6800 lbs per hour of steam flow in a 2 inch pipe at 100 psig pressure.

What is the pressure (psi) drop per 100 ft length of pipe and the flow velocity?

Answer: psi/100 = 11 velocity = 32,000 fpm


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Figure 18: Steam Flow @ 30 psig for Schedule 40 Pipe

Design Criteria: 0.75 psi per 100 ft pipe ; 6,000 fpm max veloc




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11f Piping Design Steam Condens.75130431