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TABLE 3b.  Rated Internal Working Pressure for Copper Tube:  TYPE L*

  Annealed Drawn**
Nominal
or
Standard
Size in		 S=
6000
psi
100f		 S=
5100
psi
150f		 S=
4800
psi
200f		 S=
4800
psi
250f		 S=
4700
psi
300f 		S=
4000
psi
350f		 S=
3000
psi
400f		 S=
9000
psi
100f		 S=
9000
psi
150f		 S=
9000
psi
200f		 S=
9000
psi
250f		 S=
8700
psi
300f		 S=
8500
psi
350f		 S=
8200
psi
400f
1/4 912 775 729 729 714 608 456 1367 1367 1367 1367 1322 1292 1246
3/8 779 662 623 623 610 519 389 1168 1168 1168 1138 1129 1103 1064
1/2 722 613 577 577 565 481 361 1082 1082 1082 1082 1046 1022 986
5/8 631 537 505 505 495 421 316 947 947 947 947 916 895 863
3/4 582 495 466 466 456 388 291 873 873 873 873 844 825 796
1 494 420 395 395 387 330 247 741 741 741 741 717 700 676
1-1/4 439 373 351 351 344 293 219 658 658 658 658 636 622 600
1-1/2 408 347 327 327 320 272 204 613 613 613 613 592 579 558
2 364 309 291 291 285 242 182 545 545 545 545 527 515 497
2-1/2 336 285 269 269 263 224 168 504 504 504 504 487 476 459
3 317 270 254 254 248 211 159 476 476 476 476 460 449 433
3-1/2 304 258 243 243 238 202 152 455 455 455 455 440 430 415
4 293 249 235 235 230 196 147 440 440 440 440 425 415 401
5 269 229 215 215 211 179 135 404 404 404 404 390 381 368
6 251 213 201 201 196 167 125 376 376 376 376 364 355 343
8 270 230 216 216 212 180 135 406 406 406 406 392 383 370
10 271 231 217 217 212 181 136 407 407 407 407 393 384 371
12 253 215 203 203 199 169 127 380 380 380 380 368 359 346

NOTES:
*     Based on maximum allowable stress in tension (psi) for the indicated temperatures (F)
**   When brazing or welding is used to join drawn tube, the corresponding annealed rating must be used.

Table used with permission of Copper Development Association - 260 Madison Ave - New York, NY 10016
 
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