Page 47 - Applied Process Design For Chemical And Petrochemical Plants Volume III

66131_Ludwig_CH10B 5/30/2001 4:17 PM Page 37

Heat Transfer 37

Table 10-9
Heat Exchanger Tubesheet Layout Tube Count Table
Note the right column for tubesheet and number of passes per configuration.

1
1
37 35 33 31 29 27 25 23 / 4 21 / 4 19 / 4 17 / 4 15 / 4 13 / 4 12 10 8 I.D. of Shell (in.)
1
1
1
1
15
1,269 1,143 1,019 881 763 663 553 481 391 307 247 193 135 105 69 33 3 / 4 in. on / 16 in.
1,127 1,007 889 765 667 577 493 423 343 277 217 157 117 91 57 33 3 / 4 in. on 1 in.
965 865 765 665 587 495 419 355 287 235 183 139 101 85 53 33 3 / 4 in. on 1 in. Tubes Fixed One-Pass
699 633 551 481 427 361 307 247 205 163 133 103 73 57 33 15 1 in. on 1 / 4 in.
1
595 545 477 413 359 303 255 215 179 139 111 83 65 45 33 17 1 in. on 1 / 4 in.
1
1,242 1,088 964 846 734 626 528 452 370 300 228 166 124 94 58 32 3 / 4 in. on / 16 in.
15
1,088 972 858 746 646 556 468 398 326 264 208 154 110 90 56 28 3 / 4 in. on 1 in. Tubes
946 840 746 644 560 486 408 346 280 222 172 126 94 78 48 26 3 / 4 in. on 1 in. Fixed
688 608 530 462 410 346 292 244 204 162 126 92 62 52 32 16 1 in. on 1 / 4 in.
1
584 522 460 402 348 298 248 218 172 136 106 76 56 40 26 12 1 in. on 1 / 4 in.
1
15
1,126 1,008 882 768 648 558 460 398 304 234 180 134 94 64 34 8 3 / 4 in. on / 16 in. Two-Pass
1,000 882 772 674 566 484 406 336 270 212 158 108 72 60 26 8 3 / 4 in. on 1 in.
884 778 688 586 506 436 362 304 242 188 142 100 72 52 30 12 3 / 4 in. on 1 in. U Tubes 2
1
610 532 466 396 340 284 234 192 154 120 84 58 42 26 8 XX 1 in. on 1 / 4 in.
526 464 406 356 304 256 214 180 134 100 76 58 38 22 12 XX 1 in. on 1 / 4 in.
1
15
1,072 1,024 904 788 680 576 484 412 332 266 196 154 108 84 48 XX 3 / 4 in. on / 16 in.
1,024 912 802 692 596 508 424 360 292 232 180 134 96 72 44 XX 3 / 4 in. on 1 in.
880 778 688 590 510 440 366 308 242 192 142 126 88 72 48 XX 3 / 4 in. on 1 in. Tubes Fixed
638 560 486 422 368 308 258 212 176 138 104 78 60 44 24 XX 1 in. on 1 / 4 in.
1
1
534 476 414 360 310 260 214 188 142 110 84 74 48 40 24 XX 1 in. on 1 / 4 in.
15
1,092 976 852 740 622 534 438 378 286 218 166 122 84 56 28 XX 3 / 4 in. on / 16 in. Four-Pass
968 852 744 648 542 462 386 318 254 198 146 98 64 52 20 XX 3 / 4 in. on 1 in.
852 748 660 560 482 414 342 286 226 174 130 90 64 44 24 XX 3 / 4 in. on 1 in. U Tubes 2
1
584 508 444 376 322 266 218 178 142 110 74 50 36 20 XX XX 1 in. on 1 / 4 in.
1
500 440 384 336 286 238 198 166 122 90 66 50 32 16 XX XX 1 in. on 1 / 4 in.
1,106 964 844 732 632 532 440 372 294 230 174 116 80 XX XX XX 3 / 4 in. on / 16 in.
15
964 852 744 640 548 464 388 322 258 202 156 104 66 XX XX XX 3 / 4 in. on 1 in.
818 224 634 536 460 394 324 266 212 158 116 78 54 XX XX XX 3 / 4 in. on 1 in. Tubes Fixed
586 514 442 382 338 274 226 182 150 112 82 56 34 XX XX XX 1 in. on 1 / 4 in.
1
484 430 368 318 268 226 184 154 116 88 66 44 XX XX XX XX 1 in. on 1 / 4 in.
1
15
1,058 944 826 716 596 510 416 358 272 206 156 110 74 XX XX XX 3 / 4 in. on / 16 in. Six-Pass
940 826 720 626 518 440 366 300 238 184 134 88 56 XX XX XX 3 / 4 in. on 1 in.
820 718 632 534 458 392 322 268 210 160 118 80 56 XX XX XX 3 / 4 in. on 1 in. U Tubes 2
1
562 488 426 356 304 252 206 168 130 100 68 42 30 XX XX XX 1 in. on 1 / 4 in.
1
478 420 362 316 268 224 182 152 110 80 60 42 XX XX XX XX 1 in. on 1 / 4 in.
15
1,040 902 790 682 576 484 398 332 258 198 140 94 XX XX XX XX 3 / 4 in. on / 16 in.
902 798 694 588 496 422 344 286 224 170 124 82 XX XX XX XX 3 / 4 in. on 1 in. Tubes Fixed
760 662 576 490 414 352 286 228 174 132 94 XX XX XX XX XX 3 / 4 in. on 1 in.
1
542 466 400 342 298 240 190 154 120 90 66 XX XX XX XX XX 1 in. on 1 / 4 in.
438 388 334 280 230 192 150 128 94 74 XX XX XX XX XX XX 1 in. on 1 / 4 in.
1
15
1,032 916 796 688 578 490 398 342 254 190 142 102 68 XX XX XX 3 / 4 in. on / 16 in. Eight-Pass
908 796 692 600 498 422 350 286 226 170 122 82 52 XX XX XX 3 / 4 in. on 1 in.
792 692 608 512 438 374 306 254 194 146 106 70 48 XX XX XX 3 / 4 in. on 1 in. U Tubes 2
1
540 464 404 340 290 238 190 154 118 90 58 38 24 XX XX XX 1 in. on 1 / 4 in.
1
456 396 344 300 254 206 170 142 98 70 50 34 XX XX XX XX 1 in. on 1 / 4 in.
1
1
1
1
1
1
37 35 33 31 29 27 25 23 / 4 21 / 4 19 / 4 17 / 4 15 / 4 13 / 4 12 10 8 I.D. of Shell (in.)
1 Allowance made for tie rods.
2 R.O.B. 2 1/ 2 tube diameter. Actual number of “U” tubes is one-half the figure shown in the table.
Applications of Tube Pitch Arrangements, Figure 10-26 pitch; pressure drop about medium to high; generally suit-
able for fouling conditions same as preceding.
Triangular Pitch, Apex Vertical or Facing Oncoming Flow.
Most popular, generally suitable for nonfouling or fouling In-Line Square Pitch. Popular for conditions requiring low-
services handled by chemical treatment, medium- to high- pressure drop and/or cleaning lanes for mechanical cleaning
pressure drop, gives better coefficients than in-line square of outside of tubes; coefficient lower than triangular pitch.
pitch.
Diamond Square Pitch. Popular arrangement for reasonable
In-Line Triangular Pitch, Apex Horizontal or at Right Angle to low-pressure drop (not as low as in-line square), mechanical
Oncoming Flow. Not as popular as the staggered triangular cleaning requirements, and better coefficient than in-line
pitch; coefficients not as high, but better than in-line square square pitch.