TRIPLE PIPE LOW TEMPERATURE PIPELINE

摘要

A pipeline system for low temperature liquid or hot gas/vapor transfer including a triple pipe arrangement wherein the low temperature liquid or hot gas/vapor is transferred through an inner pipe with a vapor or condensate return respectively being provided by an annulus between the inner pipe and a middle pipe. Thermal insulation is situated in the annulus between the middle pipe and the outer casing or pipe and the outer casing is welded to the inner double pipe system at ambient temperature in order to restrain any thermal movement of the inner pipes during cooldown or heatup to operating temperature.