STEAM PROPERTIES & FLOW CHARACTERISTICS
DRAINING CONDENSATE FROM STEAM MAINS OR STEAM SUPPLY LINES Charts Assume All Pipes are Insulated (with 80% efficiency)
Warm Up Loads are based on a 1 hour warm up time
Warm Up Loads in Pounds of Condensate per hour per 100 ft. of Steam Main
Steam Pressure (PSIG) Outside Temperature at 70˚F. Based on Sch. 40 Pipe up to 250 PSI; Sch. 80 above 250 PSI; Sch. 120, 5” & Larger, above 800 PSI. 0˚F Correction Factor † 2” 2 1 / 2 ” 3” 4” 8” 10” 12” 20” 24” Pipe Size
5” 6” 24.6 31.9 27.7 35.9
14” 16” 18” 107 140 176 120 157 198 130 169 213 146 191 241 172 225 284 192 250 316 208 271 342 222 290 366 238 310 391 251 328 414 265 347 437 277 362 456 299 390 492 531 682 854 590 759 971
0 5
6.2 6.9 7.5 8.4 9.9
9.7
12.8 18.2 14.4 20.4
48 48 58 66 78 86 93
68 77 83 93
90
207 233 251 284 334 372 403 431 461 487 514 537 579
308 324 350 396 465 518 561 600 642 679 716 748 807
1.50 1.44 1.41 1.37 1.32 1.29 1.27 1.26 1.25 1.24 1.23 1.22 1.21 1.20 1.18 1.17 1.16 1.16 1.15 1.14 1.13 1.13 1.13 1.13
11.0
101 109 124
10 20 40 60 80
11.8 15.5 22.0 29.9 38.8 13.4 17.5 24.9 33.8 44 15.8 20.6 29.3 39.7 52
110 145 122 162 132 175
11.0 17.5 22.9 32.6 12.0 19.0 24.9 35.3 12.8 20.3 26.6 37.8
44 48 51 55 58 61 64 69
57 62 67 71 75 79 83 89
100 125 150 175 200 250 300 400 500 600 800
100 142 188
13.7 21.7 28.4 14.5 23.0 30.0 15.3 24.2 31.7 16.0 25.3 33.1 17.2 27.3 35.8
40 43 45 47 51 75 83 91 98
107 113 119 125 134 217 241 262 284
152 200 160 212 169 224 177 234 191 252 322 443 358 493 389 535 421 579
25.0 38.3
51 57 62 67
104 116 126 136
143 159 173 187 274 305 340
1045 1182 1163 1650
27.8 30.2 32.7
43 46 50 58 64 72 79 87 94 97
642 825 1033 1263 1793 694 893 1118 1367 1939 1132 1445 1835 2227 3227 1263 1612 2047 2485 3601 1407 1796 2280 2767 4010
38 45 52 62 71 78 80
77 113 203 86 126 227 96 140 253
455 670 943 508 748 1052 566 833 1172
1000 1200 1400 1600 1750 1800
106 155 280 376 117 171 309 415 126 184 333 448 129 189 341 459
626 922 1297 1558 1988 2524 3064 4440
692 1018 1432 1720 2194 2786 746 1098 1544 1855 2367 3006 764 1125 1584 1902 2427 3082
3382 4901 3648 5285 3741 5420
Running Loads in Pounds of Condensate per hour per 100 ft. of Steam Main
Outside Temperature at 70˚F.
Steam Pressure (PSIG)
0˚F Correction Factor †
Pipe Size
2” 2 1 / 2 ” 3” 4”
5” 6”
8” 10”
12”
14” 16” 18”
20”
24”
10 30 60
6 8
7 9
9
11 14 18 22 24 26 34 37 43 49 55 69 82 97
13 17 24 28 30 33 42 46 53 61 68
16 20 27 33 36 43 50 54 63 73 82
20 26 33 41 45 53 62 68 80 91
24 32 41 51 56 66 77 85 99
29 38 49 61 66 78 92
32 42 54 67 73 86
36 39 48 51
44 57 74 93
53 68 89
1.58 1.50 1.45 1.41 1.39 1.38 1.36 1.35 1.33 1.32 1.31 1.30 1.27 1.26 1.25 1.22 1.22 1.21
11 14 18 20 23 27 30 34 39 44 53 63 75
10 12 13 16 18 20 23 27 30 36 43 51 60 69 76 79
12 15 16 19 22 25 28 33 37 44 52 62 73 85 93 96
62 77 84 98
67 83 90
100 125 175 250 300 400 500 600 800
111 121 141 168 184 216 246 277 365 435 515 610 704 773 800
101 119 140 154 180 206 232 305 363 430 509 588 645 667
107
101 111 130 148 167
116 126
101 118 135 152
126 148 170 191
138 162 185 208
114
103 128
85 101 101 120 119 142 141 168 163 195 179 213 185 221
131 156 185 219 253 278 288
164 194 195 231 230 274 273 324
214 244 274 254 290 326 301 343 386 356 407 457 412 470 528 452 516 580 467 534 600
1000 1200 1400 1600 1750 1800
89 114 103 132 113 145 117 150
31
375
347 411 358 425
† For outdoor temperatures of 0˚F, multiply load value selected from table by correction factor shown.
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