Loading and unloading process flow for hydrofluoric acid tank area

This is a crucial issue. I understand that what you are asking is: since tank trucks use a loading and unloading method from above, what kind of unloading method should be used at the tank end to ensure safety and efficiency? My personal recommendation is as follows: for the unloading method, it is recommended to use top-loading/unloading for tank trucks, while bottom feeding (or lower feeding) is suggested for storage tanks. Since hydrofluoric acid is volatile and highly corrosive, feeding from above can easily lead to splashing and static electricity buildup; feeding from below is safer and also reduces pipe vibrations caused by vapor backflow. The essential equipment must include: a dip pipe (a specialized loading/unloading arm for gas-liquid separation) + a remote emergency shut-off valve + a vapor equilibrium tube (or exhaust gas recovery system). Especially gas-phase equilibrium prevents the storage tank from collapsing or experiencing overpressure during unloading. It is recommended to install magnetic flap level gauges, pressure transmitters, and an interlock system to cut off operation at high liquid levels. Material and corrosion resistance: This is something that must be paid attention to! Hydrofluoric acid causes severe corrosion to ordinary carbon steel; therefore, fluorinated pipes or equipment lined with polytetrafluoroethylene (PTFE) must be used, and valves should also be lined with fluoroplastics or made of Hastelloy C-276. If resources are limited, at least the pipes and tanks should be lined with PTFE; otherwise, problems will arise soon. It is recommended to verify the local safety regulations and design standards once again; it would be best to have a qualified chemical plant design firm prepare a plan, as hydrofluoric acid is highly toxic and corrosive, and safety cannot be taken lightly.