Document X71kLw7Q7XZgDMonGgD1m3xXK

Heating Ventilating Air Conditioning Guide 1939 Table 11. Coefficients of Transmission (/) for Pipes Insulated with Corrugated Asbestos Type Insulation (8 Plies Per Inch Thickness) These coefficients are expressed in Blu per hour per square foot of pipe surface per degree Fahrenheit difference in temperature.behveen pipe.and surrounding still air at 70 F Thickness . ' of Insolation (Inches) - Nominal Pipe Size (Inches). '-1 ! :l ' K K l : m. .2 : 2K 3 ; 3a : 4 : 4K ; 5. 6, 8.. ' ,, : 10 12 120 F Hot Water 150 F 180 F 210 F 227.1 F (5 Lb) 50 F 80 F Temperatube Difference 110F 140 F 157.1'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 0.402 0.397 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 (50 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 0.452 337.9 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 0.473 0.466 i . , K. --K 0.664 0.679 0.695 0.711 0.720 0.759 0.780 0.593 0.607 0.621 0.636 0.643 0.677 0.697 ; 1 0.535 0.547 0.560 0.573 0.580 0.611 0.629 : IK : 0.488 0.499 0.510 0.522 0.528 0.556 0.572 IK 2: 0.457 0.467 0.478 0.490 0.496 0.522 0.537 0.425 0.434 0.444 0.455 0.460 0.485 0.499 : 2K 0.399 0.408 0.418 0.428 0.434 0.457 0.471 3 0.378 0.387 0.396 0.405 0.411 0.433 0.446 m 3K 0.363 0.371 0.380 0.388 0.393 0.415 0.427 - 4' 0.353 0.361 0.369 0.378 0.383 0.403 0.415 4K ' 0.343 0.351 0.360 0.368 0.373 0.393 0.404 5 .0.334 0.342 0.350 0.358 0.363 0.383 0.394 i .6 0.325 0.333 0.341 0.349 0.353 0.373 0.383 : 8 0.309 0.316 0.324 0.332 0.336 0.355 0.365 10 0.295 0.303 0.310 0.318 0.322 0.340 0.350 12 0.291 0.298 0.306 0.313 0.317 0.335 0.344 2 --------- ---- - K 0.585 0.599 0.613 0.627 0.635 K 0.520 0.533 0.545 : 0.558 0.565 1 0.465 0.476 0.487 0.498 0.504 : IK 0.422 0.432 0.442 ; 0.452 01458 IK 0.394 0.403 0.412. 0.422 0.427 2 0.364 0.372 0.380 0.388 0.393 -2K 0.339 0.347 0.355 0.363 0.367 3 0.319 0.327 0.334 0.342 0.346 3K :4 0.304 .0.311 0.318 0.326 0.330 0.295 0.302 0.308 0.315 0.319 4K .0.285 0.292 0.299 0.306 0.310 : ' 5 0.278 0.284 0.290 0.297 0.301 6 ,0.269 0.275 0.282 0.288 0.292 8 . 0.253 0.259 0.265 0.270 0.273 10 0.240 0.245 0.251 0.257 0.260 ____ 12....... ... . ..0.236... ,,Q,24L- ..0,247... .0,253... 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 0.277 742 c-.r! Chapter 39. Piping and Duct Insulation Table 12. Coefficients of Transmission (U) for Pipes Insulated with Laminated Asbestos Type Insulation (30 to 40 Laminations 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 OF Insulation (Inches) 1 IK .-- 2 Pipe Size (Inches) K K 1 IK IK 2 2K 3 3K 4 4K 5 6 8 10 12 - 120 F S0F 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 0.304 0.301 Hot Water 150 F 180 F 210 F | 227.1 F (S Lb) 80T Temperature Difference HO F 140 F 157.1 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 0.312 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 0.320 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 0.328 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 0.332 0.328 Steam 297.7 (50 Lb) 337.9 F (100 Lb) 227.7 F 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 0.350 0.346 267.9 F 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 0.361 0.356 K K l lK IK 2 2K 3 3K 4 4K 5 :6 _ 8 10 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 0.223 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 0.229 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 0.235 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 0.241 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 0.245 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 0.27O 0.258 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 0.266 0.263 KK l iK IK 2 2K 3 3K 4 4K 5 6 810 12 0.442 0.392 0.352 0.319 0.297 0.274 0.256 0.243 0.231 0.223 0.216 0.210 0.203 0.191 0.182 0.178 0.453 0.402 0.360 0.327 0.304 0.280 0.262 0.249 0.236 0.228 0.222 0.215 0.208 0.196 0.187 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 0.192 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 0.196 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 0.199 | 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 0.210 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 0.215 0.210 743 X E j: } i" %% | j: i; >. f. i' tg if [f i j + : 'f I