Rated Internal Working Pressure for Copper Tube: ACR* (Air Conditioning and Refrigeration Field Service)

Nominal or standard size, in inches Annealed Drawn**
COILS
S= 6000 psi 100F S= 5100 psi 150F S= 4900 psi 200F S= 4800 psi 250F S= 4700 psi 300F S= 4000 psi 350F S= 3000 psi 400F S= 10,300 psi 100F S= 10,300 psi 150F S= 10,300 psi 200F S= 10,300 psi 250F S= 10,000 psi 300F S= 9,700 psi 350F S= 9,400 psi 400F
1/8 3074 2613 2510 2459 2408 2049 1537 — — — — — — —
3/16 1935 1645 1581 1548 1516 1290 968 — — — — — — —
¼ 1406 1195 1148 1125 1102 938 703 — — — — — — —
5/16 1197 1017 977 957 937 798 598 — — — — — — —
3/8 984 836 803 787 770 656 492 — — — — — — —
½ 727 618 594 581 569 485 363 — — — — — — —
5/8 618 525 504 494 484 412 309 — — — — — — —
¾ 511 435 417 409 400 341 256 — — — — — — —
¾ 631 537 516 505 495 421 316 — — — — — — —
7/8 582 495 475 466 456 388 291 — — — — — — —
1-1/8 494 420 404 395 387 330 247 — — — — — — —
1-3/8 439 373 358 351 344 293 219 — — — — — — —
1-5/8 408 347 334 327 320 272 204 — — — — — — —
STRAIGHT LENGTHS
3/8 914 777 747 731 716 609 457 1569 1569 1569 1569 1524 1478 1432
½ 781 664 638 625 612 521 391 1341 1341 1341 1341 1302 1263 1224
5/8 723 615 591 579 567 482 362 1242 1242 1242 1242 1206 1169 1133
¾ 633 538 517 506 496 422 316 1086 1086 1086 1086 1055 1023 991
7/8 583 496 477 467 457 389 292 1002 1002 1002 1002 972 943 914
1-1/8 495 421 404 396 388 330 248 850 850 850 850 825 801 776
1-3/8 440 374 359 352 344 293 220 755 755 755 755 733 711 689
1-5/8 409 348 334 327 320 273 205 702 702 702 702 682 661 641
2-1/8 364 309 297 291 285 243 182 625 625 625 625 607 589 570
2-5/8 336 286 275 269 263 224 168 577 577 577 577 560 544 527
3-1/8 317 270 259 254 249 212 159 545 545 545 545 529 513 497
3-5/8 304 258 248 243 238 203 152 522 522 522 522 506 491 476
4-1/8 293 249 240 235 230 196 147 504 504 504 504 489 474 460
* 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. For additional information, see Pressure Ratings and Burst Strength.