Document 1yQGNVVo8DxMoKOM1ow767O05

American Society of Heating and Ventilating Engineers Guide, 1932 Table 6. Coefficients of Transmission (17) for Pipes Insulated with Corrugated Asbestos Type Insulation (4 Plies Per Inch Thickness) Tkese coefficients are expressed in Btu per hour per square fool of pipe surface per degree Fahrenheit difference in temperature between pipe and surrounding still air at 70 F Thickness OF Insulation (Inches) i 2 Nominal Pipe Size (Inches) A % i m ia 2 m 3 3A 4 4H 5 6 8 9 12 120 F 50 F 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 Hot Water 150 F 180 F 210 F 227.2 F (5Lb) Temperature Difference 0 F 110 F 140 F j 157.2 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 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 Steam 298.7 F - 337.9 F (10 Lb) (100 Lb) 228.7 F 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 0.577 0.654 0.639 0.624 0.611 0.599 0.575 0.564 0.550 A 3A l 0.737 0.657 0.594 0.762 0.679 0.614 0.787 0.702 0.634 0.812 0.725 0.654 0.826 0.737 0.666 0.884 0.790 0.713 0.918 0.820 0.740 D4 0.542 0.559 0.577 0.596 0.606 0.649 0.673 rA 0.507 0.524 0.541 0.558 0.568 0.609 0.632 2 0.471 0.487 0.503 0.519 0.528 0.565 0.587 2A 0.443 0.458 0.473 0.488 0.497 0.533 0.553 3 0.421 0.435 0.449 0.463 0.472 0.506 0.525 3A 0.403 0.417. 0.430 0.443 0.451 0.483 0.502 4 0.393 0.405 0.418 0.432 0.439 0.471 0.489 4H 0.383 0.394 0.407 0.420 0.428 0.460 0.476 5 0.372 0.384 0.397 0.409 0.417 0.447 0.463 6 0.362 0.374 0.387 0.399 0.406 0.436 0.452 8 0.343 0.354 0.366 0.378 0.385 0.413 0.429 9 0.334 0.345 0..357 0.368 0.375 0:403 0.419 12 ' 0.323 0.334 0.346 0.357 0.364 0.391 0.407 3A T I'A IA .2 m 3- 3A 4 *A 5 6 8 9 12 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 0.670 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 0.692 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 0.713 0.637 0.570 0.517 0.481 0.444 0.415 0.390 0.373 0.360 0.350 0.340 0.329 0.310 0.300 0.289 0.726 0.648 0.580 0.527 0.490 0.452 0.422 0.397 0.380 0.367 0.357 0.346 0.335 0.315 0.305 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 0.325 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 0.338 . 0.325 194 4* . Chapter 12--Pipe Insulation Table 7. Coefficients of Transmission (U) for Pipes I nsulated with Corrugated Asbestos Type Insulation (8Plies.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 TBICKNE83 : 'of j Insulatiob (Inches) l! 1A : 2: `| 'i ` Nominal Pipe Size (Inches) A H l l% iA 2 2H 3 3A 4 \A 5 6 8 9 12 A %A 1 iA iA 2 2'A 3 3 'A 4 5 6 8 9 12 A 3A 1 i'A iA 2 2A 3 3A 4 5 6 8 9 12 120 F 50 F 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 150 F 180 F | 210 F &TBAM 227.2 F | 298.7 F (5 Lb) j (10 Lb) Temperature Difference 80 F 110 F 140 F 157.2 F 228.7 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 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 0.452 337.9 F (100 Lb) 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 0.627 0.545 0.558 0.487 0.498 0.442 0.452 0.412 0.422 0.380 . 0.388 0.355 0.363 0.334 0.342 0.318 0.326 0.308 0.315 0.299 0.306 0.290 0.297 0.282 0.288 0.265- 0.270 0.256 0.262 0.247 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 0.277 195