Difference between pressure vessel and column

c
   c      1. Pressure vessel stores pressurised product in it depending on the requirements of process Column normally has atmospheric pressure 2. Pressure vessel is designed to withstand circumferential load,known as Hoope Stess, but column takes the axial load. 3. column act as a force through one direction equal, pressure vessel act as a force all direction equal 4. colum is using for seperation of gases or liquids .thats why we are using trays inside .ve ssel always using to store or gas through demester pads.colum always higher than vessel.colum actual a staic producer .vessel stores pressorised product