JOINT STRUCTURE FOR PRESSURIZED CONTAINER, AND JOINT STRUCTURE FOR PIPING

摘要

Provided are: a sealing member that can be manufactured at low cost, is not susceptible to defects, and can increase sealing properties using the pressure of an internal or external fluid; a joint structure using the same; and a wall member, a pressurized container and a piping unit equipped with said joint structure. Sealing members (7) are formed in a planar shape, and a sealing surface (5a) and a pressure-receiving surface (5d) are each formed on a surface of each sealing member (7). Each sealing surface (5a) forms a protrusion (13) provided so as to protrude in the direction opposite to the pressure-receiving surface (5d), and is mirror finished. The sealing members (7) are installed so as to protrude inwards at a connecting part (12) between a wall member (11a) and a pressurized container (11b).