From: ahk@chinet.com   
      
   dpeltier@my-deja.com wrote:   
   >"Adam H. Kerman"  wrote:   
   >>dpeltier@my-deja.com wrote:   
   >>>"Adam H. Kerman"  wrote:   
   >>>>dpeltier@my-deja.com wrote:   
      
   >>>The cars are not pressurized, but they are sealed. So yes, you quickly   
   >>>reach a point where the number of high-energy liquid molecules that escape   
   >>>the surface tension of the liquid (i.e. evaporate) is equal to the number   
   >>>of low-energy gas molecules get captured by the surface tension of the   
   >>>liquid (i.e. condense). Then you reach an equilibrium where some of the   
   >>>material is in gas form and some in liquid. And if the cars are loaded to   
   >>>near their volume capacity, it will mostly still be liquid.   
      
   >>They're not sealed against the evaporation of gases, nor from the atmosphere.   
      
   >They are pressure tested at up to 100 psi, so yes, they are sealed from the   
   >atmosphere (except for a pressure relief valve).   
      
   Is that sufficient for the dissolved gases that have escaped to remain   
   contained?   
      
   Thanks for the rest of the explanation.   
      
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