To maintain flow above the wax appearance temperature (WAT), what is the primary physical difference in heat retention between a standard single-wall steel pipe and a pipe-in-pipe insulation system?

The primary physical difference in heat retention between a single-wall steel pipe and a pipe-in-pipe system is the presence of an active thermal barrier created by a low-conductivity insulation layer. A standard single-wall steel pipe relies solely on the high thermal conductivity of steel, which allows heat to escape rapidly into the cold surrounding environment, such as deep-sea water. In cont....