200,000 psi pressure vessel wall thickness?
200,000 psi pressure vessel wall thickness?
(OP)
I'm Having a part machined with a cylinder shape approximately 14 inches in length with a cylinder hole in the center with a diameter of .930 . I have no idea how thick the cylinder wall needs to be. I have looked up and used hoop stress calculators online but I do not understand if they take into account the type of material that I am using. I will be using a high-grade 4340 vacuum melt steel. After the heat treating process is complete it will have a ultimate tensile strength of approximately 260,000 psi. I can get the material data sheet listed if that would help. This part needs to be able to withstand a 200,000 PSI working pressure. Any help or direction would be greatly appreciated. Thank you





RE: 200,000 psi pressure vessel wall thickness?
RE: 200,000 psi pressure vessel wall thickness?
RE: 200,000 psi pressure vessel wall thickness?
RE: 200,000 psi pressure vessel wall thickness?
And any calculation has to use the strength of your material.
Not only should leak before break be a concern, but what safety factor do you need?
In simple service usually 3.5x is the minimum that anyone would use (this means that your calculation using the UTS should result in a theoretical burst pressure of 700,000psi). If the materials involved are hazardous to toxic then a higher safety factor is warranted.
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P.E. Metallurgy, Plymouth Tube
RE: 200,000 psi pressure vessel wall thickness?
RE: 200,000 psi pressure vessel wall thickness?
RE: 200,000 psi pressure vessel wall thickness?
Best regards - Al
RE: 200,000 psi pressure vessel wall thickness?
Design margins are specific to high pressure - the 3.5 that EdStainless mentioned is incorrect for Division 3 - it's actually 1.8 on ultimate.
RE: 200,000 psi pressure vessel wall thickness?
RE: 200,000 psi pressure vessel wall thickness?
Pay someone like TGS4 who knows what they are doing to design this properly.
RE: 200,000 psi pressure vessel wall thickness?