FIELD: storage or distribution of gases or liquids.
SUBSTANCE: inner bottom wall (3) of the double hull contains a sump structure containing rigid container (11) located thicker than the bottom wall of the tank and designed to house suction element (1) of the pump. Rigid container contains bottom wall (13) located at a level remote in the direction of the outer side in comparison with auxiliary sealing membrane (5) of the bottom wall of the tank. Design of the sump contains main connecting panel (14) surrounding the container, the main connecting panel has a connecting surface extending parallel to the main sealing membrane of the bottom wall of the tank, while the main sealing membrane (7) of the bottom wall of the tank is tightly attached to the connecting surface on all sides of the construction of the sump.
EFFECT: technical result is to increase the reliability and ease of manufacture of the bottom wall of the membrane-type tank.
24 cl, 12 dwg
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