PDV America, Inc. and Subsidiaries - Page 13

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          bogies or H-beams and load skates; and (3) once at the new site,            
          reversing the process and lowering the tank onto its new                    
          foundation.  The entire lifting, moving, and lowering process can           
          be completed in 1 week.  For a tank with a diameter of 80 feet, a           
          crew of four people can perform the initial lifting process in              
          approximately 8 hours.                                                      
               When relocating tanks using the Watson Air Bag technology,             
          significant damage to a tank is unlikely.  Tanks are lifted                 
          between 3 and 5 feet above the ground.  Although a section of the           
          tank could fall and hit the ground, any damage from such a fall             
          is repairable.  In some cases, the cost to move the tank intact             
          is only 30 percent of the cost to cut the tank down and                     
          reconstruct it at the new site.                                             
               3.  Dismantling and Reconstruction                                     
               API Standard 653 provides procedures for dismantling and               
          reconstructing welded tanks for relocation from their original              
          site.  When dismantling the tank, API Standard 653 recommends               
          marking the shell, bottom, and roof plates for easy                         
          identification.  If properly followed, the specifications of API            
          Standard 653 will produce a tank with an “acceptable appearance             
          and structural integrity”.                                                  
               A crew of 8 to 10 people can dismantle and reconstruct a               
          tank.  First, cranes hold the steel plates in place as the tank             
          is cut apart with torches or other cutting devices.  Then, the              

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Last modified: May 25, 2011