Pressure vessels are closed containers used for handling and storing of fluids. It passes the sequence of hydrostatic test. The process industry designers have recognized the limitations for confining large volumes of high internal pressures in single wall vessel. The increment in thickness beyond certain value will posses only fabrication difficulties. Multilayer pressure vessels are reliable equipment useful in wide range of operating conditions. So for this purpose we are adding the material

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... called carbon fibre to steel. We are using hydrogen as a fluid in both single wall pressure vessel and multilayer pressure vessel at the pressure of 21 N/mm 2 . Single wall pressure vessel and multilayer pressure vessels are designed in "Solidworks". The stresses, strains, displacements, frequencies developed in solid wall pressure vessel and multilayer pressure vessel are analyzed by using "COSMOS".