Requirements for installing drain pipes in liquefied gas transmission pipelines
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As stated in the title, for maintenance purposes, a drain is to be added at the end of the liquefied gas transmission pipeline to facilitate drainage after water is injected into the pipeline. Are there any requirements regarding the installation of such a drain on liquefied gas pipelines?
The pressure isn’t that high; it’s not that serious, so it’s not necessary to use double valves. Now, for discharge valves of hazardous media that are not used frequently, pipe caps are installed on half of them.
Yes, on liquefied gas pipelines, where drain valves are not used frequently, it is necessary to install pipe caps to prevent leaks inside the valves, as this could increase the safety risks associated with liquefied gas leaks.
It is recommended to use dual valves for controlling the dehydration valve in general containers.