Page 39 - Pressure Vessel Design Manual

General Design 25

0.0625E Notes
A to left of material line P, = ~
1. As an alternative, the thickness required for 2:l S.E.
heads for external pressure may be computed from the
Bt formula for internal pressure where P = 1.67 P, and
A to right of material line P. - -
- R,, E = 1.0.
Table 2-1 a
Maximum Length of Unstiffened Shells

36 204
00
42 168 280
31 3 00
48 142 235 358
264 437 00
54 122 203 306 437
228 377 00
60 104 178 268 381
200 330 499 00
66 91 157 238 336 458
174 293 442 626 00
72 79 138 21 3 302 408 537
152 263 396 561 00
78 70 124 193 273 369 483 61 6
136 237 359 508 686 00
84 63 110 175 249 336 438 559
123 21 2 327 462 625 81 6 00
90 57 99 157 228 308 402 51 0 637
112 190 300 424 573 748 00
96 52 90 143 21 0 284 370 470 585 715
103 173 274 391 528 689 a75 00
102 48 82 130 190 263 343 435 540 661 795
94 160 249 363 490 639 810 1,005 00
108 44 76 1 ia 176 245 320 405 502 613 738 a75
87 148 228 337 456 594 754 935 00
114 42 70 109 162 223 299 379 469 571 687 81 6
79 138 21 1 31 1 426 555 705 874 1,064 00
120 39 65 101 149 209 280 355 440 536 642 762 894
74 128 197 287 400 52 1 660 819 997 00
126 37 61 95 138 195 263 334 414 504 603 71 5 839 974
69 120 184 266 374 490 62 1 770 938 1,124 00
132 35 57 88 129 1 ai 242 31 5 391 475 569 673 789 916 1,053
65 113 173 248 348 462 586 727 a84 1,060 1,253 00
138 33 54 a3 121 169 228 297 369 449 538 636 744 864 994
62 106 163 234 325 437 555 687 836 1,002 1,185 00
144 31 51 78 114 158 21 4 275 350 426 510 603 705 81 7 940 1,073
59 98 154 221 304 41 1 526 652 793 950 1,123 1,312 00
150 49 74 107 148 201 26 1 332 405 485 573 669 774 891 1,017 1,152
92 146 209 286 385 499 619 753 902 1,066 1,246 1,442 00
156 46 70 101 140 1 a9 248 309 385 462 546 637 737 846 966 1,095
87 138 199 271 363 475 590 717 859 1,015 1,186 1,373 co
162 44 67 96 133 178 233 294 367 440 520 608 703 806 919 1,042
83 131 189 258 342 448 562 684 81 9 968 1,131 1,309 1,509 co

Notes.
1. All values are in in.
2. Values are for temperatures up to 500°F.
3. Top value is for full vacuum, lower value is half vacuum.
4. Values are for carbon or low-alloy steel (Fv>3O,O0Opsi) based on Figure 2-19,