Document 6BDEyVO5y71a9M0G3NwmpE3Ng

American Society of Heating and Ventilating Engineers Guide,'1936 Table 7. Coefficients of Transmission (U) for Pipes Insulated with Corrugated Asbestos Type Insulation (4 Plies Per Inch Thickness) These coefficients are expressed in Btu per hour per square foot of pipe surface per degree Fahrenheit difference in temperature between pipe and surrounding still air at 70 F Thickness or Inbulation (Inches) i 14 2 Pipe Size (Inches) 4 y i i \i 14 2 24 3 3y2 4 44. 5 6 8 10 12 Yi Y l 1Y 2 24 3 34 4 44 5 6 8 10 12 4 M 1 lY 14 2 2Yi 3 34 4 4)4 5 6 8 10 12 Hot Water 120 F | ISO F | 180 P 210 F 227.1 F (5 Lb) 50 F 80 F Temperature Difference HOP 140 F 157.1 0.890 0.803 0.731 0.671 0.635 0.595 0.567 0.544 0.527 0.513 0.502 0.490 0.480 0.462 0.447 0.441 0.919 0.829 0.756 0.693 0.656 0.615 0.586 0:562 0.544 0.530 0.518 0.507 0.496 0.477 0.462 0.456 0.949 0.857 0.780 0.716 0.677 0.635 0.605 0.580 0.561 0.548 0.535 0.523 0.512 0.493 0.476 0.470 0.978 0.883 0.804 0.738 0.698 0.656 0.624 0.598 0.578 0.565 0.551 0.539 0.528 0.508 0.491 0.485 0.995 0.898 0.818 0.751 0.710 0.667 0.635 0.608 0.588 0.575 0.561 0.549 0.538 0.517 0.500 0.493 Steam 297.7" (50 Lb) 227.7 1.065 0.961 0.876 0.804 0.760 0.715 0.680 0.652 0.631 0.616 0.601 0.588 0.577 0.554 0.537 0.529 337.9 F (100 Lb) 267^9F 1.106 0.997 0.909 0.834 0.788 0.742 0.705 0.677 0.654 0.639 0.624 0.611 0.599 0.575 0.557 0.550 0.737 0.657 0.594 0.542 0.507 0.471 0.443 0.421 0.403 0.393 0.383 0.372 0.362 0.343, 0.328 0.323 0.762 0.679 0.614 0.559 0.524 0.487 0.458 0.435 0.417 0.405 0.394 0.384 0.374 0.354 0.339 0.334 0.787 0.702 0.634 0.577 0.541 0.503 0.473 0.449 0.430 0.418 0.407 0.397 0.387 0.366 0.351 0.346 0.812 0.725 0.654 0.596 0.558 0.519 0.488 0.463 0.443 0.432 0.420 0.409 0.399 0.378 0.362 0.357 0.826 0.737 0.666 0.606 0.568 0.528 0.497 0.472 0.451 0.439 0.428 0.417 0.406 0.385 0.369 0.364 0.884 0.790 0.713 0.649 0.609 0.565 0.533 0.506 0.483 0.471 0.460 0.447 0.436 0.413 0.397 0.391 0.918 0.820 0.740 0.673 0.632 0.587 0.553 0.525. 0.502 0.489 0.476 0.463 0.452 0.429 0.413 0.407 0.648 0.578 0.518 0.469 0.438 0.404 0.379 0.356 0.339 0.328 0.318 0.308 0.299 0.282 0.267 0.263 0.670 0.598 0.535 0.485 0.452 0.417 0.391 0.367. 0.350 0.339 0.328 0.318 0.309 0.291 0.276 0.272 0.692 0.713 0.726 0.617 0.637 0.648 0.552 0.570 0.580 0.501 0.517 0.527 0.467 0.481 0.490 0.430 0.444 0.452 0.403 0.415 0.422 0.378 0.390 0.397 0.361 0.373 0.380 0.350 0.360 0.367 0.339 0.350 0.357 0.329 0.340 0.346 0.319 0.329 0.335 0.301 0.310 0.315 0.285 0.294 0.299 0.280 | 0.289 l 0.294 0.779 0.694 0.622 0.566 0.526 .0.483 0.451 0.425 0.406 0.392 0.381 0.370 0.358 0.336 0.319 0.314.. 0.810 0.720 0.645 0.587 0.545 0.502 0.466 0.440 0.421 0.406 0.395 0.384 0.371 0.349 0.332 0.325 658 Chapter 36--Insulation of Piping Table 8. Coefficients of Transmission (U) for Pipes Insulated with Corrugated Asbestos Type Insulation (8 Plies Per Inch Thickness) r These coefficients are expressed in Btu per hour per square foot of pipe surface per degree Fahrenheit difference in temperature between pipe and surrounding still air at 70 F THICKNESS or Insulation (Inches) i 14 2 Nominal PtPB Size (Inches) 4 Y l lY 14 2 24 3 34 4 44 5 6 8 10 12 4 Y 1 lY 14 2 24 3 34 4 44 5 6 8 10 12 4 Y l iY 14 2 24 3 34 4 44 5 6 8 10 12 120 F 50 P 0.801 0.723 0.658 0.606 0.573 0.538 0.511 0.489 0.474 0.461 0.451 0.442 0.432 0.416 0.402 0.397 Hot Water ISO F 180 F 210 F 227.1 V (5 Lb) Temperature Difference 80 F ^ HOF 140 F 157.1 F 0.820 0.739 0.673 0.619 0.586 0.550 0.523 0.501 0.485 0.472 0.462 0.452 0.442 0.426 0.412 0.406 0.838 0.756 0.688 0.633 0.599 0.562 0.534 0.512 0.496 0.482 0.472 0.462 0.452 0.436 0.421 0.415 0.857 0.773 0.704 0.647 0.612 0.575 0.546 0.524 0.507 0.493 0.482 0.473 0.463 0.446 0.430 0.424 0.868 0.783 0.713 0.655 0.619 0.581 0.553 0.531 0.514 0.500 0.489 0.479 0.468 0.451 0.435 0.429 Steam 297.7 F | 337.9 F (SO Lb) (100 Lb) 227.7 F 0.913 0.824 0.751 0.688 0.652 0.612 0.582 0.558 0.542 0.527 0.515 0.505 0.493 0.475 0.459 0.452 267.9 F 0.939 0.847 0.772 0.707 0.670 0.629 0.599 0.575 0.557 0.542 0.530 0.520 0.508 0.489 0.473 0.466 0.664 0.593 0.535 0.488 0.457 0.425 0.399 0.378 0.363 0.353 0.343 0.334 0.325 0.309 0.295 0.291 0.679 0.607 0.547 0.499 0.467 0.434 0.408 0.387 0.371 0.361 0.351 0.342 0.333 0.316 0.303 0.298 0.695 0.621 0.560 0.510 0.478 0.444 0.418 0.396 0.380 0.369 0.360 0.350 0.341 0.324 0.310 0.306 0.711 0.636 0.573 0.522 0.490 0.455 0.428 0.405 0.388 0.378 0.368 0.358 0.349 0.332 0.318 0.313 0.720 0.643 0.580 0.528 0.496 0.460 0.434 0.411 0.393 0.383 0.373 0.363 .0.353 0.336 0.322 0.317. 0.759 0.677 0.611 0.556 0.522 0.485 0.457 0.433 0.415 0.403 0.393 0.383 0.373 0.355 0.340 0.335 0.780 0.697 0.629 0.572 0.537 0.499 0.471 0.446 0.427 0.415 0.404 0.394 0.383 0.365 0.350 0.344 0.585 0.520 0.465 0.422 0.394 0.364 0.339 0.319 0.304 0.295 0.285 0.278 0.269 0.253 0.240 0.236 0.599 0.533 0.476 0.432 0.403 0.372 0.347 0.327 0.311 0.302 0.292 0.284 0.275 0.259 0.245 0.241 0.613 0.545 0.487 0.442 0.412 0.380 0.355 0.334 0.318 0.308 0.299 0.290 0.282 0.265 0.251 0.247 0.627 0.635 0.558 0.565 0.498 0.504 0.452 0.458 0.422 0.427 0.388 0.393 0.363 0.367 0.342 0.346 0.326 0.330 0.315 0.319 0.306 0.310 0.297 0.301 0.288 1 0.292 0.270 I 0.273 0.257 0.260 0.253 1 0.256 0.668 0.595 0.532 0.483 0.450 0.415 0.387 0.365 0.349 0.336 0.327 0.317 0.307 0.288 0.275 0.270 0.688 0.612 0.547 0.497 0.462 0.427 0.398 0.375 0.358 0.345 0.336 0.326 0.315 0.296 0.282 0.277 659