Regarding the liquid nitrogen outlet pipeline
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A new liquid nitrogen storage tank has been installed. There are connection pipes between the old and new tanks; the pipeline from the old tank’s outlet to the vaporizer is a vacuum pipe, while the pipeline from the new tank’s outlet is connected to the old tank’s outlet and is made of ordinary 304 stainless steel. It is approximately 11 meters long and equipped with insulation measures. Could this pipeline cause the liquid nitrogen inside it to vaporize, just like in the vaporizer, thereby triggering the safety valve and affecting the use of liquid nitrogen?
Yes, absorption of heat will definitely lead to vaporization
Heat retention is relative, not absolute. Low-temperature liquid pipelines all require insulation, and the best method for insulation is vacuum insulation; however, it has drawbacks in terms of safety and cost. Insulation with filler is quite common. It is important to note, regardless of the insulation conditions, the liquid inside the pipes must not remain in a non-flowing state for extended periods of time; this point requires special attention. For reference.