Why are the safety valves required for calculating vertical LPG tanks so much larger than those for horizontal ones?
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Please clarify the conditions: if the diameter and volume are the same, the difference shouldn’t be too great...
When performing vertical calculations, it is necessary to enter a filling height, and then SW6 is used to calculate the required safety vent area, which turns out to be extremely large
The expansion amount of the discharge medium is the same in vertical and horizontal configurations; due to the limited gas phase space, the discharge area is larger in the vertical configuration
It is preliminarily judged that the poster confused the filling height with the liquid level height in the calculation process
For height, check the unit; it’s meters, not millimeters. ! ! !
Well, I checked it, and indeed it was displayed in millimeters:funk: You really are experienced
This post was last edited by zxhslm on 2017-10-19 at 10:51. The original poster’s post is good; such a comparison has not been done before. But by looking at the calculation formulas provided in GB150, the two should be similar. To calculate the leakage volume of the container, for horizontal containers with elliptical heads, the length is taken as L + 0.3D0 (total length of the container + 0.3 times the external diameter of the container); for vertical containers, the length is taken as h1 (the highest liquid level in the container). When comparing in this way, for liquefied gas containers of the same specifications and size holding the same medium, the safe discharge capacity of horizontal tanks should be greater than that of vertical tanks; therefore, the safety valves required for horizontal tanks need to be larger than those for vertical tanks.