Question

Now we are designing a cylinder tank. Parameters are: height 26 inch, outer diameter 6.75 inch, normal internal pressure 3642 psi, test pressure 5067 psi. The material we choose is AISI 4340 carbon steel and the yield strength is 220.06*10^3 psi. First initial test is 1.15 times of test pressure, second test will be repeatedly pressurized from 50 psi to 20% above normal internal pressure.factor of safety is given as 3. And we need to judge the wall thickness of the tank to suitable the testing pressure. Clearly state which failure theory you employed and show the assumption during the calculation.

Answer 1