TUBULAR BODY HAVING ISOLATION LAYER OF FOAMED PLASTIC AND METHOD FOR PRODUCING SAME

摘要

A tubular body (10; 20) comprising a single-piece first layer (11; 21) of a foamed plastic material for isolating the interior of the body from the exterior of the body, the tubular body having an inner surface (17; 27) and an outer surface (14; 24), at least a part the outer surface (14; 24) of the tubular body (10; 20) having a corrugated shape comprising annular protrusions (15; 25) alternating with annular recesses (16; 26).