How is explosion pressure determined for a reaction furnace that had a design pressure of 15 psig?
How is explosion pressure determined for a reaction furnace that had a design pressure of 15 psig?
(OP)
I want to determine the maximum pressure a reaction furnace can take in case of an internal explosion. The material is SA516 70N, shell thickness is 0.625", CA is 0.125" and operating temperature is 675°F. Internal radius is 41" and E IS 0.85. I am not sure if I can use the regular circumferential and longitudinal stress formula to determine the pressure. I would appreciate your help.





RE: How is explosion pressure determined for a reaction furnace that had a design pressure of 15 psig?
Then, you're going to need to decide if you use minimum-specified properties for the steel or actual properties. Then, you're going to need to define "failure". Is it that something leaks? Is it that stresses exceed a certain value? What about local stresses? When I have done this, I use an elastic-plastic analysis (non-linear geometry and true-stress-true-strain curve), and also pay special attention to triaxiality (because that may be the initiation point for a failure). Of course, based on the duration of the explosion, you'll want to look into using strain-rate-dependant stress-strain curves - high strain rates typical of explosions can increase the strength of the material.
You'll also have to look into the temperature of the explosion and determine, based on the duration, whether that will raise the metal temperature.
So, not a simple task. You'll want to search the technical literature for "impulsively loaded vessels" for additional information. Good luck!
RE: How is explosion pressure determined for a reaction furnace that had a design pressure of 15 psig?
Thanks
Jaideep
RE: How is explosion pressure determined for a reaction furnace that had a design pressure of 15 psig?