Double-skin cryogenic tank equipped with at least one inspection device

A tank comprising an interior skin, an exterior skin and an intercalated zone between the interior and exterior skins, the interior and exterior skins delimiting an interior zone in contact with the interior skin and an exterior zone in contact with the exterior skin, wherein the tank includes at least one inspection device comprising:

• a first orifice configured to establish communication between the interior zone and the intercalated zone via the interior skin,
• a second orifice configured to establish communication between the intercalated zone and the exterior zone via the exterior skin, the first and second orifices being aligned in a radial direction,
• a first plug configured to occupy a mounted first state in which the first plug prevents any flow through the first orifice and a demounted second state in which the first plug enables access through the first orifice,
• a second plug configured to occupy a mounted first state in which the second plug prevents any flow through the second orifice and a demounted second state in which the second plug enables access through the second orifice, and
• an intercalated pipe positioned in the intercalated zone, having a first end section connected to the interior skin and communicating with the first orifice, a second end section connected to the exterior skin and communicating with the second orifice, and an intercalated section forming a bellows configured to be deformed in the radial direction,
• wherein the at least one inspection device includes a permanently sealed connection connecting the intercalated pipe and a first support fastened to the interior skin or the exterior skin and a sealed demountable connection connecting the intercalated pipe and second support fastened to the interior skin or the exterior skin.