Finned Tube Surface Area

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AVERAGE OUTSIDE SURFACE AREA
(Sq. Ft. per Lineal Foot of Tube)

Tube O.D. Chart

O.D. FIN FIN Number of Fins per Inch of Length
TUBE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
3/8" 0.125 0.625 0.233 0.267 0.300 0.334 0.369 0.403 0.437 0.471 0.505 0.573
  0.250 0.875 0.433 0.517 0.600 0.684 0.768 0.853 0.937 1.021 1.105 1.273
  0.312 1.000 0.557 0.673 0.788 0.902 1.017 1.132 1.247 1.362 1.477  
O.D. FIN FIN Number of Fins per Inch of Length
TUBE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
1/2" 0.125 0.750 0.298 0.340 0.382 0.424 0.466 0.508 0.55 0.592 0.634 0.718
  0.250 1.000 0.531 0.632 0.731 0.834 0.935 1.036 1.137 1.238 1.339 1.514
  0.312 1.125 0.672 0.808 0.943 1.080 1.216 1.352 1.488 1.624 1.760 2.032
  0.375 1.250 0.830 1.005 1.179 1.335 1.530 1.705 1.880 2.005 2.230  
O.D. FIN FIN Number of Fins per Inch of Length
TUBE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
5/8" 0.250 1.125 0.630 0.746 0.862 0.978 1.094 1.210 1.326 1.442 1.558 1.790
  0.312 1.250 0.787 0.943 1.099 1.255 1.411 1.567 1.723 1.879 2.035 2.347
  0.375 1.375 0.961 1.160 1.359 1.558 1.757 1.956 2.155 2.354 2.553 2.951
  0.438 1.500 1.151 1.398 1.645 1.892 2.139 2.386 2.633 2.880 3.127  
O.D. FIN FIN Number of Fins per Inch of Length
TUBE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
3/4" 0.250 1.250 0.728 0.861 0.993 1.127 1.260 1.393 1.526 1.659 1.792 2.058
  0.312 1.375 0.902 1.078 1.254 1.430 1.606 1.782 1.958 2.134 2.310 2.662
  0.375 1.500 1.092 1.316 1.539 1.764 1.988 2.212 2.436 2.660 2.884 3.332
  0.438 1.625 1.298 1.574 1.849 2.126 2.402 2.678 2.954 3.230 3.506 4.058
  0.500 1.750 1.521 1.852 2.183 2.514 2.845 3.176 3.507 3.838 4.169  
O.D. FIN FIN Number of Fins per Inch of Length
TUBE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
7/8" 0.250 1.375 0.826 0.975 1.124 1.273 1.422 1.571 1.720 1.869 2.018 2.316
  0.312 1.5 1.016 1.213 1.41 1.661 1.876 2.091 2.306 2.521 2.736 3.166
  0.375 1.625 1.223 1.471 1.719 1.967 2.215 2.463 2.711 2.959 3.207 3.703
  0.438 1.75 1.445 1.75 2.054 2.36 2.665 2.970 3.275 3.580 3.885  
  0.500 1.875 1.685 2.049 2.412 2.777 3.141 3.505 3.869 4.233 4.597  
O.D. FIN FIN Number of Fins per Inch of Length
TUBE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
1" 0.250 1.500 0.924 1.090 1.255 1.422 1.588 1.754 1.920 2.086 2.252 2.584
  0.312 1.625 1.131 1.348 1.565 1.782 1.999 2.216 2.433 2.650 2.867 3.301
  0.375 1.750 1.354 1.626 1.899 2.170 2.442 2.714 2.986 3.258 3.530 4.074
  0.438 1.875 1.593 1.925 2.258 2.589 2.921 3.253 3.585 3.917 4.249  
  0.500 2.000 1.848 2.245 2.642 3.039 3.436 3.833 4.230 4.627 5.024  
  0.625 2.250 2.409 2.945 3.482 4.017 4.553 5.089        

Pipe Size Chart

PIPE FIN FIN Number of Fins per Inch of Length
SIZE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
3/4" 0.250 1.550 0.968 1.141 1.315 1.490 1.663 1.863 2.009 2.182 2.355  
(1.050") 0.312 1.675 1.182 1.409 1.636 1.863 2.090 2.317 2.554 2.771 2.998  
  0.375 1.800 1.413 1.697 1.981 2.265 2.549 2.833 3.117 3.401 3.685  
  0.438 1.925 1.660 2.006 2.352 2.698 3.044 3.390 3.736 4.082 4.428  
  0.500 2.050 1.923 2.335 2.747 3.159 3.571 3.983 4.395      
  0.625 2.300 2.498 3.055 3.610 4.166 4.723 5.280        
PIPE FIN FIN Number of Fins per Inch of Length
SIZE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
1" 0.375 2.065 1.690 2.027 2.363 2.701 3.038 3.375 3.712 4.049 4.386  
(1.315") 0.438 2.190 1.972 2.379 2.786 3.193 3.600 4.007 4.414 4.821 5.228  
  0.500 2.315 2.270 2.752 3.232 3.716 4.198 4.680 5.162 5.644 6.126  
  0.625 2.565 2.915 3.558 4.200 4.841 5.487 6.130        
  0.750 2.815 3.626 4.446 5.266 6.086 6.906 7.726        
PIPE FIN FIN Number of Fins per Inch of Length
SIZE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
1-1/4" 0.500 2.660 2.722 3.293 3.865 4.435 5.006 5.577 6.148 6.719 7.290  
(1.660") 0.625 2.910 3.457 4.213 4.968 5.722 6.477 7.232        
  0.750 3.160 4.258 5.214 6.170 7.126 8.082 9.038        
PIPE FIN FIN Number of Fins per Inch of Length
SIZE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
1-1/2" 0.500 2.900 3.036 3.670 4.305 4.941 5.576 6.211 6.846 7.481 8.116  
(1.900") 0.625 3.150 3.834 4.668 5.502 6.336 7.170 8.004        
  0.750 3.400 4.698 5.748 6.798 7.848 8.898 9.948        
  0.875 3.650 5.627 6.909 8.192 9.473 10.755 12.037        
PIPE FIN FIN Number of Fins per Inch of Length
SIZE HEIGTH O.D. 4 5 6 7 8 9 10 11 12 14
2" 0.500 3.375 3.658 4.417 5.176 5.935 6.698 7.453 8.212 8.971 9.730  
(2.375") 0.625 3.625 4.580 5.570 6.559 7.550 8.540 9.530        
  0.750 3.875 5.568 6.805 8.041 9.279 10.516 11.753        
  0.875 4.125 6.621 8.122 9.622 11.124 12.625 14.126        
  1.000 4.375 7.741 9.520 11.300 13.081 14.861          
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