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

  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 --- --- --- --- --- --- --- --- --- --- --- --- --- ---
3/8 570 485 456 456 447 380 285 855 855 855 855 827 808 779
1/2 494 420 395 395 387 329 247 741 741 741 741 716 700 675
5/8 --- --- --- --- --- --- --- --- --- --- --- --- --- ---
3/4 407 346 326 326 319 271 204 611 611 611 611 590 577 56
1 337 286 270 270 264 225 169 506 506 506 506 489 477 461
1-1/4 338 287 271 271 265 225 169 507 507 507 507 490 479 462
1-1/2 331 282 265 265 259 221 166 497 497 497 497 480 469 453
2 299 254 239 239 234 199 149 448 448 448 448 433 423 408
2-1/2 274 233 219 219 215 183 137 411 411 411 411 397 388 375
3 253 215 203 203 199 169 127 380 380 380 380 367 359 346
3-1/2 252 214 202 202 197 168 126 378 378 378 378 366 357 345
4 251 213 201 201 197 167 126 377 377 377 377 364 356 343
5 233 198 186 186 182 155 116 349 349 349 349 338 330 318
6 218 186 175 175 171 146 109 328 328 328 328 317 310 299
8 229 195 183 183 180 153 115 344 344 344 344 332 325 313
10 230 195 184 184 180 153 115 344 344 344 344 333 325 314
12 230 195 184 184 180 153 115 345 345 345 345 333 326 314

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.
*** Types M and DWV are not normally available in annealed temper.

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