Insulated hose is a flexible piping engaged to distribute cryogenic liquids. The hose is bendable possessing a minimal bend radius, and is comprised of a pair of corrugated stainless steel tubes concentric with each other and spaced apart by a Teflon spacer. The space in between the tubes is filled with vacuum continuously by a pump to create dynamic vacuum insulation, which does not deteriorate. The hose is ice-free with the outer tube assuming a temperature that is below the ambient temperature by only a few degrees. Hoses of this type are used transferring liquid nitrogen for short connection.
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