Pressure vessel manufacturing

Pressure vessel manufacturing

• 1.
  Pressure vessel manufacturing
• 2.
  What is aPressure 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 PRESSUREVESSELSThin-walledThick-walledDiameter is 10 times or more the thickness of wall.Diameter is less than 10 times the thickness of wall.
• 4.
  MATERIALS USEDSteelAluminumOther metalsCarbonFibersPolymers
• 5.
  EXAMPLES:Diving cylinder orScuba TankLPG tanksTankers
• 6.
  MANUFACTURING PROCESSFormingPressingSpinningBendingWeldingPost WeldHeat Treatment (PWHT)AssemblyPainting
• 7.
  Formingthe process bywhich the size or shape of the part is changed by application of forceHot 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.
  RecrystallizationA process bywhich deformed grains are replaced by new undeformed grainsRecrystallization Temperaturethe minimum temperature at which complete recrystallization occurs
• 9.
  PressingA process whereina pressing machine is used to shape the part needed
• 10.
  SpinningThe process usedto shape the end of the pressure vessels, which is called the headAfter 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.
  BendingProcess which curvesthe material to the desired radiusUses a bending machineAlso called rolling
• 12.
  WeldingProcess by whichtwo or more materials are joined permanently by melting both materials.
• 13.
  POST WELD HEATTREATMENT (PWTH)A process of improving the properties of the weldmentUses a furnace to heat the product
• 14.
  AssemblyProcess of joiningthe parts of the pressure vessel
• 15.
  PaintingProcess of applyingpain to protect the product from corrosion