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  1. Windstorm

    Carbon Bed Void Area

    I have a client that would like to take a 60" ID Rich Amine Carbon Filter 150"T/T Vertical vessel designed for 200 psig at 350F and fill the vessel with carbon from the bottom head to the top tangent. However, we typically leave a 20% void area at the top for backwash/regeneration/ etc. The...
  2. Windstorm

    WFCM Commentary 2001ed "What is the formula?"

    On page 43 of the Commentary to WFCM, in footnote 2 they make a jump from p=51.4 psf to p=85.65 psf. The equation that is used is not mentioned and only values are used: p=[51.4 psf]/[(cos26.6))(cos(26.6))/(16 in./12)]. So the formula is p(new value) = p(old value)/cos^2. They went from the...
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