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Pressure vessel manufacturing
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  • 1. Pressure vessel manufacturing
  • 2. What is a Pressure Vessel?
    A pressure vessel is a container designed used to hold gases or liquids at a pressure different from the ambient pressure.
  • 3. TYPES OF PRESSURE VESSELS
    Thin-walled
    Thick-walled
    Diameter is 10 times or more the thickness of wall.
    Diameter is less than 10 times the thickness of wall.
  • 4. MATERIALS USED
    Steel
    Aluminum
    Other metals
    Carbon Fibers
    Polymers
  • 5. EXAMPLES:
    Diving cylinder or Scuba Tank
    LPG tanks
    Tankers
  • 6. MANUFACTURING PROCESS
    Forming
    Pressing
    Spinning
    Bending
    Welding
    Post Weld Heat Treatment (PWHT)
    Assembly
    Painting
  • 7. Forming
    the process by which the size or shape of the part is changed by application of force
    Hot forming – fabrication temperature is above the recrystallization temperature of the material.
    Warm forming - fabrication temperature is above room temperature but below recrystallization temperature of the material.
    Cold forming – fabrication temperature is very much below the recrystallization temperature of the material.
  • 8. Recrystallization
    A process by which deformed grains are replaced by new undeformed grains
    Recrystallization Temperature
    the minimum temperature at which complete recrystallization occurs
  • 9. Pressing
    A process wherein a pressing machine is used to shape the part needed
  • 10. Spinning
    The process used to shape the end of the pressure vessels, which is called the head
    After pressing, the material is loaded into
    the spinning machine. While spinning,
    the material is formed using adjustable
    rollers until the final shape is achieved.
  • 11. Bending
    Process which curves the material to the desired radius
    Uses a bending
    machine
    Also called rolling
  • 12. Welding
    Process by which two or more materials
    are joined permanently by melting both
    materials.
  • 13. POST WELD HEAT TREATMENT (PWTH)
    A process of improving the properties of the weldment
    Uses a furnace to heat the product
  • 14. Assembly
    Process of joining the parts of the pressure vessel
  • 15. Painting
    Process of applying pain to protect the product from corrosion