Document r78yoRJzmw8N4mk09x8kXZM7

American Society o/ Heating and Ventilating Engineers Guide, 1932 Table 8. ^Coefficients of Transmission (/) for Pipes Insulated with Laminated Asbestos Type Insulation (30 to 40 Laminations Per Inch: Thickness) The.se 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 : Insolation . (Inches) '- W1 r lA \; ,2 Y Nominal Pipe Size (Inches) A A 1 1*4 lA 2 2A 3 3A 4 4M 5 6 8 9 12 120 F 50 F 0.605 0.546 0.498 0.457 0,432 0.406 0.385 0.370 0.359 0.349 0.341 0.334 0.327 0.314 0.308 0.301 Hot Water Steam ' 150 F 180 F 210 F 227.2 F | 298.7 F | 337.9 F (5 Lb) 1 (10 Lb) 1 (100 Lb) Temperature Difference 80 K 110 F 140 F 157.2 F 228.7 F 267.9 F 0.620. 0.560 0.510 0.468 0.442 0.416 0.395 0.379 0.367 0.358 0.350 0.342 0.335 0.322 0.316 0.308 0.635 0.573 0.522 0.480 0.453 0.426 0.405 0.389 0.376 0.366 0.359 0.351 0.343 0.330 0.325 0.316 0.650 0.586 0.534 0.491 0.464 0.437 0.415 0.398 0.385 0.375 0.367 0.359 0.351 0.338 0.333 0.324 0.658 0.594 0.541 0.497 0.470 0.442 0.420 0.403 0.390 0.380 0.372 0.364 0.356 0.343 0.336 0.328 0.695 0.627 0.570 0.525 0.496 0.467 0.443 0.425 0.413 0.402 0.393 0.384 0.376 0.362 0.355 0.346 0.716 0.645 0.587 0.540 0.511 0.481 0.457 0.438 0.426 0.414 0.405 0.395 0.387 0.373 0.366 0.356 A M i lA ? 7A 3 3A 4 4H S 6 8 9 12 0.502 0.450 0.405 0.369 0.343 0.321 0.301 0.286 0.274 0.267 0.259 0.253 0.247 0.234 0.227 0.221 0.514 0.461 0.415 0.378 0.352 0.329 0.309 0.293 0.281 0.273 0.266 0.260 0.253 0.240 0.233 0.227 0.526 0.473 0.426 0.387 0.361 0.337 0.317 0.301 0.288 0.280 0.272 0.266 0.260 0.246 0.239 .0.232 0.539 0.484 0.436 0.396 0.370 0.345 0.324 0.308 0.295 0.287 0.279 0.272 0.266 0.252 0.245 0.238 0:546 0.490 0.442 0.401 0.375 0.350 0.330 0.313 0.300 0.291 0.283 0.276 0.269 0.255 0.249 0.241 0.577 0.517 0.466 0.423 0.397 0.369 0.348 0.330 0.316 0.307 0.299 0.291 0.284 0.270 0.263 0.255 0.595 0.532 0.480 0.435 0.409 0.380 0.358 0.340 0.326 0.317 0.308 0.300 0.293 0.279 0.271 0.263 A A l m IA 2 2A 3 3A 4 4^ 5 6 8 9 12 0.442 0.453 0.392 0.402 0.352 0.360 . 0.319 0.327 0.297 0:304 0.274, 0.280 0.256 0.262 0.243 0.249 0.231 0.236 0.223 0.228 0.216 0.222 0.210 0.215 0.203 0.208 0.191 0.196 0.185 0.190 0.178 0.183 0.464 0.412 0.369 0.335 0.311 0.287 0.269 0.254 0.242 0.234 0.227 0.220 0.213 0.201 0.195 0.187 0.475 0.422 0.378 0.343 0.319 0.294 0.275 0.260 0.248 0.240 0.233 0.225 0.218 0.206 0.200 0.192 0.481 0.428 0.383 0.348 0.323 0.298 0.279 0.264 0.251 0.243 0.236 0.228 0.221 0.209 0.203 0.195 0.508 0.452 0.405 0.367 0.341 0.314 0.293 0.277 0.265 0.257 0.249 0.241 0.233 0.220 0.214 0.205 0.523 0.465 0.417 0.379 0.352 0.324 0.302 0.285 0.273 0.265 0.256 0.248 0.240 0.227 0.220 0.210 196 v -.Chapter 12--Pipe Insulation Table 9; Coefficients of Transmission (U) for Pipes Insulated with.Laminated Asbestos Type Insulation (Approximately 20 Laminations Per Inch Thickness) These 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 \A 2 Nominal Pipe Size (Inches) A l lA lA 2 2A 3 3A 4 4A 5 6 8 9 12 A A 1 lA l A2 2A 3 3A 4 4A 5 6 8 9 12 A A 1 lA lA. 2 2A 3 3A 4 4A 5 6 8 9 12 - 120F 50 F 0.910 0.823 0:748 0.686 0.649 0.610 0.581 0.558 0.539 0.524 0.514 0.503 0.492 0.473 .0.463 0.452 0.755 0.674 0.607 0.553 0.517 0.481 0.453 0.429 0.412 0.400 0.390 0.380 0.369 0.351 0.342 0.332 0.664 0.591 0.529 0.480 0.445 0.412 0.385 0.364 0.346 0.336 0.325 0.316 0.306 0.288 0.280 0.269 Hot Water 150 F 180 F | 210 F 227.2 F (5 Lb) Temperature Difference 80 F 110 F 140 F 157.2 F 0.925 0.836 0.760 0.698 0.659 0.620 0.590 0.567 0.548 0.532 0.522 0.511 0.500 0.480 0.471 0.459 0.940 0.850 0.773 0.710 0.671 0.630 0.600 0.576 0.557 0.541 0.530 0.519 0.509 0.488 0.478 0.467 0.956 0.863 0.785 0.721 0.682 0.640 0.609 0.585 0.566 0.551 0.539 0.528 0.517 0.497 0.486 0.475 0.964 0.871 0.792 0.728 0.688 0.647 0.615 0.591 0.571 0.556 0.544 0.533 0.522 0.502 0.491 0.478 0.767 0.685 0.618 0.562 0.527 0.490 0.460 0.436 0.419 0.407 0.396 0.386 0.375 0.358 0.349 0.338 0.780 0.697 0.628 0.572 0.536 0.499 0.469 0.444 0.427 0.415 0.402 .0.393 0.382 0.364 0.355 0.344 0.793 0.708 0.639 0.581 0.545 0.508 0.477 0.452 0.434 0.422 0.409 0.400 0.389 0.370 0.361 0.350 0.800 0.715 0.645 0.587 0.550 0.513 0.481 0.456 0.438 0.426 0.413 0.403 0.392 0.374 0.364 0.353 0.675 0.601 0.538 0.488 0.453 0.420 0.392 0.370 0.352 0.342 0.332 0.322 0.312 0.293 0.284 0.274 0.687 0.611 0.547 0.497 0.462 0.427 0:398 0.376 0.358 0.348 0:338 0.327 0.317 0.298 0.289 0.278 0.698 0.621 0.557 0.505 0.470 0.434 0.405 0.382 0.365 0.354 0.343 0.333 0.323 0.303 0.294 0.283 0.704 0.627 0.562 0.510 0.475 0.438 0.409 0.385 0.368 0.357 0.346 0.336 0.326 0.306 0.297 0.286 Steam 298.7 F | 337.9 F (10 Lb) 1 (100 Lb) 228.7 F 1.001 0.902 0.823 0.756 0.716 0.671 0.638 0.613 0.592 0.577 0.564 0.553 0.542 0.521 0.510 0.497 267.9 F 1.022 0.921 0.840 0.771 0.731 0.685 0.651 0.626 0.604 0.589 0.575 0.565 0.553. 0.532 0.520 0.507 0.831 0.743 0.670 0.610 0.572 0.535 0.500 0.475 0.456 0.443 0.429 0.418 0.408 0.388 0.378 0.367 0.848 0.759 0.684 0.622 0.584 0.547 0.511 0.485 0.465 0.453 0.437 0.427 0.417 0.397 0.387 0.375 0.732 0.652 0.584 0.529 0.494 0.455 0.425 0.400 0.382 0.371 0.3600.349 0.338 0.317 0.307 0.296 0.747 0.665 0.597 0.540 0.504 0.464 0.434 0.408 0.390 0.378 0.367 0.356 0.345 0.324 0.313 0.302 197