The present invention relates to a multi-layer tubular structure (MLT) intended for the transport of automotive fluids, in particular air, oil, water, a
urea solution, a glycol-based
coolant, or a fuel such as
gasoline, in particular alcoholic
gasoline, bio-
gasoline or diesel, in particular bio-diesel, or
hydrogen, consisting of two
layers: a layer (1) consisting of a composition comprising mainly at least one semi-crystalline aliphatic
polyamide, said composition being made up of at least 50% recycled material originating from a single-layer and / or multi-layer tube having been intended for the transport of automotive fluids, in particular as defined above, said tube being made up of a composition which mainly comprises at least one
polyamide, said tube having undergone various treatments chosen from
grinding then recompounding,and
grinding then recompounding and then reformulation to be able to be recycled, a simple single
grinding being excluded from the different treatments, a layer (2) consisting of a composition comprising mainly at least one semi-crystalline aliphatic
polyamide and optionally at least one
impact modifier, and when the layer (2) consists of a composition comprising mainly at least one semi-crystalline aliphatic polyamide which is PA12 and / or PA612 and / or PA1010, then said composition comprises said
impact modifier, and said layer (2) being made of at least 90% of non-recycled material.,