Find out whether nitrogen is needed for loading liquefied gas onto trains – is it necessary?
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The area on our facility’s pier where liquefied gas is stored is supplied only with steam, not with nitrogen; some experts say that a nitrogen supply line should be installed. Let’s discuss whether it’s necessary
It’s necessary, right! It facilitates the replacement of tank trucks and can also be used for line sweeping replacement.
It is necessary to facilitate the replacement of tank trucks as well as the purging of pipelines after loading is completed.
It is necessary; at least it can be useful when dealing with steam pipelines
In terms of the flexibility of process operation, it is advantageous as it facilitates line sweeping and replacement. From a safety perspective, in practical applications, when dealing with LPG leaks, using low-pressure steam to disperse the LPG gas helps reduce its concentration and effectively protect human safety. As for N2, its effectiveness is not ideal due to its density and temperature, and it may also cause suffocation accidents as a result of people inhaling it by mistake.
LPG systems generally have relatively high pressures; for many factories, the operating pressure in such systems is higher than that of the nitrogen piping network. Therefore, after loading is complete, it is essential to pay attention to the system pressure; otherwise, reverse flow can cause serious problems. Therefore, during normal loading processes, nitrogen is generally used less often. However, nitrogen is the best medium for process treatment or displacement, so it is necessary to have a nitrogen pipeline network at the stack platform
I agree with the view from the 6th floor: using nitrogen to blow the medium, which is a liquid at normal pressure, back into the storage tank or into a tank truck is a good approach. However, when the pressure of the medium is too high, it is generally necessary to have a separate nitrogen pipeline; it’s worth checking whether the facility has nitrogen available in that specification. In my opinion, if there is a slight leak after the entire packaging process is completed, the gas will not cause significant pollution at normal pressure; it depends on the regulations of your organization to see whether this is allowed
The \"Safety Management Regulations for Railway Tank Cars Transporting Liquefied Gases\" (version 87) issued by the former Ministry of Chemical Industry, as well as the \"Safety Inspection Regulations for Road Tank Cars Transporting Liquefied Gases\" (version 94) issued by the former Ministry of Labor, both stipulate that nitrogen purging must be carried out on tank cars carrying flammable LPG substances before loading, with the oxygen content inside the tanks having to be less than 3%.
Having a nitrogen line has advantages, as it facilitates process operations
Is the poster from Qingdao Lianhua? I know experts who have raised this question. Nitrogen is not necessary, as not every tank truck requires nitrogen purging. Nitrogen is not necessarily required for pipeline replacement. To accommodate various situations that may arise during the production process, it is recommended to use strainers for steam, nitrogen, and water.
A nitrogen line is necessary. The reasons are: 1. The need to change the pipeline medium; 2. Purge tank trucks are used to change the medium in order to prevent the mixture from reaching its explosive limit.
Personally, I think it’s necessary
Nitrogen, steam, water, plant air, etc., are the basic media in utility stations, and they should be in place for safety or operational reasons