What are the design standards for vacuum-insulated liquid nitrogen pipelines?
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This post was last edited by flute6 on 2010-10-15 20:22. What are the standards for the design of vacuum-insulated liquid nitrogen pipelines? This is my first time dealing with this type of pipe; thank you!
Take a look: GB 16912-2008 Safety Technical Regulations for the Production of Oxygen and Related Gases by Deep Freezing Method; GB 50030-91 Design Code for Oxygen Stations
Reply to 2# tofomy: The medium in the pipeline is liquid nitrogen. I’ve checked, but there’s nothing related to it
Don’t you want the design specifications for liquid nitrogen tubes? Is vacuum insulation always used for liquid nitrogen tubes? What do you actually need?
This post was last edited by lxqlxqli on 2010-10-18 at 16:31. Design and fabrication of thermal-insulating vacuum sleeves; after reviewing the content, nothing related was found
Please see, it includes calculations for the insulation layer (note the single-layer insulation for cylinders). I’m not sure how large the heat insulation workload is for LZ. If it’s not much, I suggest using foam glass for heat insulation; if the pipelines are quite long, vacuum insulation could be an option. The manufacturing and acceptance standards should be discussed with the manufacturing unit (it is possible to turn to low-temperature equipment manufacturers, as they have specialized standards). However, there is one point that may be useful for your reference: the design, manufacturing, and acceptance standards for vacuum-insulated thermal insulation sleeves provided by Chengdu Huoli Low Temperature Equipment Co., Ltd. were Q/72039409-5.1-2006 ； Welding specification: JB/T4709-2000 ； Welding inspection: 100% radiographic testing, rated as Grade II according to JB/T4370-2005. The above is for reference only.
Reply to 6# tofomy: This project has been subcontracted. Thanks anyway!
The design of the entire pipeline can follow standard industrial piping design practices. As for the internal design of the liquid nitrogen vacuum-insulated pipeline, that is something that specialized manufacturers of vacuum insulation pipelines should handle; there’s no need for you to worry about it.