Paper producers test for several different strength properties including tensile, burst, tear, elongation, TEA, etc. Tear is the closest to your request. These numbers are affected by multiple variables including kraft content, basis weight, moisture content, fibre orientation (cross machine...
Unfortunately, there is no simple conversion factor since piping losses are affected by stock consistencies, temperatures, freeness, velocities, type of stock, whether it is virgin or repulped, etc, etc, and the behavior due to these factors is not a linear correlation with the behavior of...