Page 94 - Process Equipment and Plant Design Principles and Practices by Subhabrata Ray Gargi Das

4.4 Design e F T method 91

Table 4.8a Tube count e square pitch.
3
00
19.05 mm 4 OD on 25.4 mm (1 ) square pitch 25.4 mm (1 ) OD on 31.75 mm 1 1 00 square pitch
00
00
4
Shell ID, 1eP 2eP 4eP 6eP 8eP Shell ID, 1eP 2eP 4eP 6eP 8eP
mm(in.) mm (in.)
203 (8) 32 26 20 20 203 (8) 21 16 14
254(10) 52 52 40 36 254(10) 32 32 26 24
305(12) 81 76 68 68 60 305(12) 48 45 40 38 36
1 1
336.5 13 97 90 82 76 70 336.5 13 61 56 52 48 44
4 4

387 15 1 137 124 116 108 108 387 15 1 81 76 68 68 64
4 4
1 1
438 17 4 177 166 158 150 142 438 17 4 112 112 96 90 82

489 19 1 224 220 204 192 188 489 19 1 138 132 128 122 116
4 4
1 1
540 21 277 270 246 240 234 540 21 177 166 158 152 148
4 4
1 1
590.55 23 341 324 308 302 292 590.55 23 213 208 192 184 184
4 4
635(25) 413 394 370 356 346 635(25) 260 252 238 226 222
686(27) 481 460 432 420 408 686(27) 300 288 278 268 260
736(29) 553 526 480 468 456 736(29) 341 326 300 294 286
787.4(31) 657 640 600 580 560 787.4(31) 406 398 380 368 358
838(33) 749 718 688 676 648 838(33) 465 460 432 420 414
889(35) 845 824 780 766 748 889(35) 522 518 488 484 472
940(37) 934 914 886 866 838 940(37) 596 574 562 544 532
990.6(39) 1049 1024 982 968 948 990.6(39) 665 644 624 612 600

31.75 mm 1 1 00 OD on 40 mm 1 9 00 square pitch 38.1 mm 1 1 00 OD on 47.625 mm 1 7 00 square pitch
4 16 2 8
254(10) 16 12 10
305(12) 30 24 22 16 16 305(12) 16 16 12 12

336.5 13 1 32 30 30 22 22 336.5 13 1 22 22 16 16
4 4
1 1
387 15 4 44 40 37 35 31 387 15 4 29 29 25 24 22

438 17 1 56 53 51 48 44 438 17 1 39 39 34 32 29
4 4
1 1
489 19 78 73 71 64 56 489 19 50 48 45 43 39
4 4
1 1
540 21 96 90 86 82 78 540 21 62 60 57 54 54
4 4

590.55 23 1 127 112 106 102 96 590.55 23 1 78 74 70 66 62
4 4
635(25) 140 135 127 123 115 635(25) 94 90 86 84 78
Continued