* Values are the average of the Spiral Gasket ID and the Wound Gasket OD
* B16.5
*
class=        150
  14.00        15.315 
  16.00        17.44 
  18.00        19.72 
  20.00        21.72 
  24.00        25.875 
class=        300
  14.00        15.315 
  16.00        17.44 
  18.00        19.72 
  20.00        21.72 
  24.00        25.875 
class=        600
  14.00        15.125 
  16.00        17.25 
  18.00        19.625 
  20.00        21.625 
  24.00        25.875 
class=        900
  14.00        14.875 
  16.00        17.125 
  18.00        19.375 
  20.00        21.5 
  24.00        25.75 
class=        1500
  14.00        15 
  16.00        17 
  18.00        19.375 
  20.00        21.375 
  24.00        25.5