Document jgdv1a4Og1gN8yXrwJVX4Eo49

r Heating Ventilating Air Conditioning Guide 1938 UTable 11. Coefficients of Transm ission ( ) for Pipes I nsulated 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 Thkxnebs or Inboution (IffCHKS) 1 lA . ' .: i 2 Nominal Pipe Sob (Inches) A A l lA \A 2 2A 3 3A .4 4A 5 6 8 10 12 A a r- :m lA .2 2A 3' 3a 4 ' 4sA * ,6 " 18 10 12 A A l \A lA 2 2A 3 3A 4 4A s 6 8 10 12 : ! Hot Water 1 120 F 1 150 F 180 F 210 F 1 227.1 F (5 Lb) Temperature Dotebencb 50 F 80 v 110 F 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 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 0.585 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 0.679 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 0.599 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 0.695 0.711 0.621 0.636 0.560 0.573 0.510 0.522 0.478 0.490 0.444 0.455 0.418 0.428 0.396 0.405 0.380 0.388 0.369 0.378 0.360 0.368 0.350 0.358 0.341 0.349 0.324 0.332 0.310 0.318 0.306 0.313 '\ 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 0.558 0.498 0.452 0.422 0.388 0.363 0.342 0.326 0.315 0.306 0.297 0.288 0.270 0.257 0.253 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 0.635 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 0.260 0.256 Steam 297.7 F (50 Lb) 337.9 F (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 0.759 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 0.668 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 0.277 726 1 Chapter 39. Piping and Duct Insulation UTable 12. Coefficients of Transmission ( ) 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 or Insulation (Inches) Nominal Pipe Size (Inches) A A l tA iA *2 2A 3 i 3A 4 4A 5 6 8 10 12 A A .l 1A lA 2 2A 3 3A 4 4A 5 -6 8 10 12 A A 1 iA lA 2 2A 3 2 3A 4 *A 5 6 8 10 : 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 0.304 0.301 Hot Wateb 150 F 180 F | 210 F 227XF (5 Lb) Temperatube Ditterencb sO F 110 F 140F H 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 F (50 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 0.346 337.9 F (100 Lb) 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 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 0.270 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 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 0.210 727 S'