Flexible heat-insulated pipe-line for in particular cryogenic fluids

摘要: A fluid-conveying, flexible, lagged pipe for building up in particular a liquefied natural gas carrying pipe-line connecting an off-shore platform working submarine oil fields or like underwater pools to tanker ship and comprising inner tubular duct including helical metal spring, intermediate layer of yielding composite material outer spring the but longitudinally offset by half pitch turns with respect latter so that said be nested between those, respectively, spring.