Transfer line for cryogenic liquid

Abstract

A transfer line includes a first conduit, a first insulation part, a first protective shield, a second conduit, a second insulation part and a second protective shield. Cryogenic liquid flows through the first conduit. The first insulation part surrounds the first conduit and has a multi-layered film structure. Film layers of the multi-layered film structure are spaced apart from each other. The first protective shield is formed with a predetermined thickness and diameter to surround the exterior of the first insulation part. Coolant for cooling the first protective shield flows through the second conduit. The second conduit is in contact with the first protective shield. The second insulation part surrounds the first protective shield and the second conduit, and has the multi-layered film structure. The second protective shield is formed with a predetermined thickness and diameter to surround the exterior of the second insulation part.