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Re: Re: Re: Pressure Vessel

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Posted by siri (203.129.195.138) on April 08, 2003 at 08:26:32:

In Reply to: Re: Re: Pressure Vessel posted by Peter on May 08, 2002 at 15:45:03:

: This equation appears to be a derivative of the basic equation for "hoop" stress in a THIN-walled
: cylinder (t = P*r/omega) where P is internal pressure, r is the mean radius of cylinder and omega is resulting hoop(circumferential)stress. The addition of the "S*E" term acts to increase the required thickness as your E (efficiency) is lowered. The - "P*E" term can be considered a factory of safety and has the same effect.
: .

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: : This equation appears to be a derivative of the basic equation for "hoop" stress in a THIN-walled : : cylinder (t = P*r/omega) where P is internal pressure, r is the mean radius of cylinder and omega is resulting hoop(circumferential)stress. The addition of the "S*E" term acts to increase the required thickness as your E (efficiency) is lowered. The - "P*E" term can be considered a factory of safety and has the same effect. : : .

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