Flexible pipe with windings of insulating strip and spiralling machine intended for manufacturing it

摘要

A lagged flexible tubular pipe for conveying fluids, produced by helically winding at least one strip made of thermal insulation around a flexible central core at a uniform pitch and with a gap. Jointly winding gap-free an intermediate extruded section into the gap between the turns of strip and sealing the gap. The intermediate section is made of a material which volume wise is nearly incompressible.