Calibration of multi-saddles for horizontal vessels
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There is a horizontal container with a diameter of 3400mm, a length of 10500mm, an elliptical head, normal pressure, and 4 saddles. Could you please tell me what the wall thickness of the shell is and how to calibrate the saddles. Thanks
I can only do the force analysis myself and calculate it manually. There are papers related to 8 saddles on the Internet, including calculation procedures, you can refer to them.
You can refer to the calculation in HG20582. It is basically the same as two saddles, just calculate separately!
You can refer to 5.8 Multi-saddle Horizontal Vessels in "Pressure Vessel Design Knowledge" compiled by the Pressure Vessel Practical Technology Series Writing Committee.
Why are there 4 saddles? 3400mm in diameter, 10500mm in length, and what about the wall thickness? Maybe two or three saddles are enough. I wonder if the poster has done the math. Adding more saddles does not necessarily make it safer. How can we ensure that the four saddles are placed on the same plane? If this cannot be guaranteed, how should the additional bending moment be considered?
Is it similar to a vulcanization tank? It seems that the vulcanization tank is * Used to many saddles.
If it is a structure with internal tracks and a loaded trolley pushing the shell during operation, it is completely different from the saddle calculation of the container. If the cylinder is not subjected to hydraulic testing, I think the track can be simplified into a simply supported beam with multiple fulcrums for calibration and calculation. The fulcrum is set at the saddle, and the cylinder itself does not require support calibration and calculation.
After checking some information, I seem to have seen it in the EN13445 standard, but I don’t have that standard. I wonder who has it, thank you?
As mentioned on the 8th floor, if the cylinder is subjected to a hydraulic test, how should it be calculated?
You can refer to the two-support storage tank, first calculate the intermediate moment of the support, select the maximum moment and substitute it into the two-support formula to check the calculation.
In the EN standard, it seems that the stress of multiple supports with equal spacing is evenly distributed.