Abstract: A method of making a tank out of blown, thermoformed, or rotomolded thermoplastic material, the method comprising the following steps: making a portion in relief on the inside of the tank, said portion in relief enabling an attachment to be mounted inside the tank and defining a permanent housing for receiving at least a portion of said attachment, the portion in relief being made: either by implementing the following steps: a) placing at least one insert inside an enclosure; b) inserting the material that is to form the wall of the tank inside the enclosure; and c) forming the wall of the tank by blowing, thermoforming, or rotomolding, the insert being positioned inside the enclosure in such a manner that while the wall is being formed, it covers the insert at least in part, the insert also being of a shape that is selected in such a manner that said wall, by taking on at least part of the shape of the insert, constitutes said portion in relief; or else by mounting a mounting member on the wall of the

Abstract: A method provides a tank out of blown, thermoformed, or rotomolded thermoplastic material with a portion in relief for enabling mounting of an attachment inside the tank. The method includes making the portion in relief on the inside of the tank, the portion in relief enabling an attachment to be mounted inside the tank. The portion in relief is made by mounting a mounting member on the wall of the tank. Preferred mounting is by heat-sealing. The wall of the tank includes at least a layer of thermoplastic material and preferably includes a layer that forms a barrier against hydrocarbons. A tank with a portion in relief mounted on an inside wall is also provided.

Abstract: A fuel tank includes a vessel having a wall, the wall includes at least a first layer forming a hydrocarbon barrier, and a second layer that is more permeable to hydrocarbons than the first layer and is located on an outside of the first layer. The fuel tank also includes an insert defining a passage between an inside of the vessel and an outside thereof. The insert includes a first end overmolded by the wall and a second end opposite to the first end projecting outside the vessel. The wall has a portion extending inside the insert around an opening of the wall, the insert being configured to form at least one region of reduced thickness in the second layer along a diffusion path for hydrocarbons diffusing along the second layer from an edge of the wall adjacent to the opening towards the outside of the vessel.

Abstract: A method of making a blown vessel provided with a passage suitable for putting the inside of the vessel into communication with the outside thereof and including a mouth on the outside, said method comprising the following steps:

Abstract: A method of making a blown vessel provided with a passage suitable for putting the inside of the vessel into communication with the outside thereof and including a mouth on the outside, said method comprising the following steps: overmolding an insert of tubular shape in a parison while it is being blown so that the parison covers one of the ends of the insert, while leaving the opposite end of the insert projecting outside the vessel so as to constitute the outside mouth of the passage, the vessel made from the parison having at least a first layer forming a hydrocarbon barrier and a second layer that is more permeable to hydrocarbons than the first and that is outside it; and then eliminating at least a portion of the wall lying inside the insert, the insert being shaped to lengthen the diffusion path for hydrocarbons diffusing along the second layer from the edge of the vessel adjacent to the removed wall portion towards the outside of the vessel, and/or to form one or more regions of reduced thickness i

Abstract: A method of making a tank out of blown, thermoformed, or rotomolded thermoplastic material, the method comprising the following steps: