What issues should be considered in pipeline layouts with gas-liquid two-phase flow?
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What issues should be considered in pipeline layouts with gas-liquid two-phase flow? :handshake
It is included in the Handbook on Design and Installation of Process Piping in Petrochemical Industry, edited by Zhang Dejiang.
(1) Pipelines should preferably run vertically first in the direction of the medium flow, and then horizontally, with the pipelines being short and straight； (2) The control valve on the pipeline should be placed as close as possible to the container that holds the medium; if conditions permit, the control valve should be connected directly to that container ； (3) The first turning elbow after the control valve should be replaced with a tee connection, and a plug should be installed at the straight-through end of the tee ； (4) Limiting or fixing supports should be installed at appropriate positions in the piping system.
For the same pipeline, the diameter of vertical pipes should be smaller than that of horizontal pipes.
When the gas and liquid phases are in the same tube, the pressure of the liquid phase will naturally be much higher. Generally, it is necessary to first vaporize the liquid phase in a vaporization furnace to turn it into a gas phase before it can be used. If there is no vaporization furnace, it is also possible to achieve the required operating pressure by reducing the pressure twice; this way, the gas can still be used properly. However, it is essential to check for leaks regularly.