Document 3JDw6zGm34wwxp857ZnOkj2qn

American Society of Heating and Ventilating Engineers Guide, 1934 Table 6. 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 t Thickness op; Inspiration (Inches) 114 .2 Pipe ; Size (Inches) 14 ' Va. 1 114 VA 2 3 $\4 4 5' 6 g 0 12 U y1 1 1% ljS4 2* VA 3' 3A 4' 414 5 6 g 0 12 A Va. 1 114 \lA 2 iy% 3 3A 4* 4A 5* 6 g 0 12 120 F Hot Water 150 F 180 F 210 F Steam 227.1 F 297.7 r (5 Lb) | (50 Lb) 337.9 r (100 Lb) SOF 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 0.453 0.441 80 F 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 0.468 0.456 Temperature Difference no f 140 F 157.1 F 227.7 r 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 0.483 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 0.498 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 0.507 0.493 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 0.544 0.529 267.9 F 1.106 0.997 0.909 0.834 0.788 0.742 0.705 0.677 0.654 0.639 0.624 0.6U 0.599 0.575 0.564 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 0.334 0.323 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 0.273 0.263 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 0.345 0.334 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 0.282 0.272 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 0.357 0.346 0.692 0.617 0.552 0.501 0.467 0.430 0.403 0.378 0.361 0.350 0.339 0.329 0.319 0.301 0.291 0.280 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 0.368 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 0.375 0.364 0.713 1 0.726 0.637 I 0.648 0.570 0.580 0.517 0.527 0.481 | 0.490 0.444 I 0.452 0.415 0.422 0.390 1 0.397 0.373 1 0.380 0:360 0.367 0.350 0.357 0.340 i 0.346 0.329 I 0.335 0.310 1 0.315 0.300 J 0.305 0.289 1 0.294 0.884 0.790 0.713 0.649 0.609 0.565 0.533 0.5U6 0.483 0.471 0.460 0.447 0.436 0.413 0.403 0.391 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 .0.325 0.314 0.918 0.820 0.740 0.675 0.662 0.587 0.555 0.525 0.502 0.489 0.476 0.463 0.452 0.429 0.419 0.407 0.810 0.720 0.645 0.587 0.545 0.502 0.466 0.440 0.421 0.406 0.395 U.384 0.371 0.349 0.338 U-325 Chapter 35--Heat Losses from Bare and Insulated Pipes Table 7. Coefficients of Transmission {V) for Pipes Insulated with Corrugated Asbestos Type Insulation (8 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 op Insulation (Inches) I i/4 2 Nominal Pipe Size (Inches) 'A 1 m 2 2A 3 4 4A 5 6 8 9 12 K 1 114 1A 2 2A 3 3A 4 4A 5 6 8 9 12 . A H 1 1A iA 2 2A 3 $l/2 4 VA 5 6 8 9 12 - 120 F 50 r 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 0.408 0.397 Hot Water I 150 F 180 F | 210 F 1 227.1 F 8 (5 Lb) Temperature Difference 80 F 110 F 140 F 1 157.1 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 0.418 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 0.427 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 0.437 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 0.442 0.429 Steam 297.7 F I 337.9 F (50 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 0.466 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 0.480 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 0.301 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 0.309 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 0.316 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 0.324 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 0.328 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 0.346 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 0.356 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 0.244 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 0.250 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 0.2S6 0.247 0.627 0.558 0.498 0.452 0.422 0.388 0.363 0.342 0.326 0.315 0.306 0.297 0.288 0.270 0.262 0.253 0.635 0.565 0.504 0.458 0.427 0.393 0.367 0.346 0.330 0.319 0.310 0.301 0.292 0.273 0.265 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 0.280 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 0.287 0.277