*
* Values are the average of the Spiral Gasket ID and the Wound Gasket OD
* B16.5
*
class=        150
   0.50        1 
   0.75        1.28 
   1.00        1.565 
   1.25        2.13 
   1.50        2.44 
   2.00        3.065 
   2.50        3.565 
   3.00        4.375 
   3.50        5.19 
   4.00        5.44 
   5.00        6.565 
   6.00        7.72 
   8.00        9.785 
  10.00        11.905 
  12.00        14.065 
class=        300
   0.50        1 
   0.75        1.28 
   1.00        1.565 
   1.25        2.13 
   1.50        2.44 
   2.00        3.065 
   2.50        3.565 
   3.00        4.375 
   3.50        5.19 
   4.00        5.44 
   5.00        6.565 
   6.00        7.72 
   8.00        9.785 
  10.00        11.905 
  12.00        14.065 
class=        600
   0.50        1 
   0.75        1.28 
   1.00        1.565 
   1.25        2.13 
   1.50        2.44 
   2.00        3.065 
   2.50        3.565 
   3.00        4.375 
   3.50        5.19 
   4.00        5.315 
   5.00        6.405 
   6.00        7.565 
   8.00        9.63 
  10.00        11.655 
  12.00        13.815 
class=        900
   0.50        1 
   0.75        1.28 
   1.00        1.565 
   1.25        1.97 
   1.50        2.315 
   2.00        2.845 
   2.50        3.315 
   3.00        4.375 
   4.00        5.315 
   5.00        6.405 
   6.00        7.565 
   8.00        9.44 
  10.00        11.565 
  12.00        13.625 
class=        1500
   0.50        1 
   0.75        1.28 
   1.00        1.565 
   1.25        1.97 
   1.50        2.315 
   2.00        2.845 
   2.50        3.315 
   3.00        4.19 
   4.00        5.255 
   5.00        6.315 
   6.00        7.5 
   8.00        9.315 
  10.00        11.375 
  12.00        13.625 
class=        2500
   1.00        1.565 
   2.00        2.845 
   3.00        4.19 
   4.00        5.255 
   5.00        6.315 
   6.00        7.5 
   8.00        9.315 
  10.00        11.44 
  12.00        13.5