148、measures taken for lng tank filling - doer equipment
classification：forum publishtime：2020-01-17 13:37:49
measures for lng tank filling
before each filling, the storage tank shall be visually inspected to see whether there is damage, whether it is clean and whether it meets the conditions of liquid operation. if damage (such as serious depression, loose joint, etc.) is found, it shall be repaired as soon as possible.
all storage tanks are filled with low purity nitrogen to prevent water from entering the storage tank. therefore, the storage tank shall be thoroughly purged with suitable gas before filling.
when filling the storage tank with cryogenic liquid, it can be transported by cryogenic pump or through pressure difference.
① . shorten the delivery pipeline as much as possible. long non insulated transmission lines will lead to filling loss and increase filling time.
② the liquid will remain in the pipeline between the two valves. when the two valves are closed, the vaporization of the low-temperature liquid between the two valves will cause overpressure in the pipe section. therefore, a safety device (safety valve) must be equipped for the pipeline.
③ . shorten the filling operation time as much as possible.
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