Calculation of the pressure generated by expansion after closing the valves at both ends of the vinyl chloride pipeline
Thread Content
After the valves at both the beginning and end of the vinyl chloride pipeline were closed, pressure rose in that section of the pipeline due to an increase in temperature. How is the pressure after expansion pressing calculated? Help calculate the pressure increase for full pipe and half pipe respectively.
Stick it by yourself; it must not sink under any circumstances
If you are certain that the increase in pressure is caused by an increase in temperature, you can take into account the saturated vapor pressure at that corresponding temperature. For a half-tube, due to the presence of a vaporization space, there should theoretically be a process of heat absorption during vaporization. If you actually do the calculations, it’s a bit complicated. But when considering balance, the temperature set should be the same as that in a fully filled pipe.