CPC F17C 1/16 (2013.01) [B29C 65/08 (2013.01); B29C 65/1412 (2013.01); B29C 65/74 (2013.01); B29L 2031/712 (2013.01); F17C 2203/0604 (2013.01); F17C 2209/219 (2013.01); F17C 2209/221 (2013.01); F17C 2209/232 (2013.01)] | 7 Claims |
1. A method of manufacturing a liner for a high pressure tank for obtaining the liner for the high pressure tank by joining two liner constituent members made of a resin material,
the liner constituent members being members each including a flange member that is provided in a vicinity of an open end and includes a bottom portion protruding outwardly in a diametrical direction, and a side portion bent from the bottom portion toward a side of a closed end, an annular recess being defined by the bottom portion and the side portion,
the method of manufacturing the liner for the high pressure tank comprising:
a contact step of placing end surfaces of the open ends of the two liner constituent members in contact with each other;
a joining step of joining the end surfaces of the open ends to each other by welding, and thereby obtaining a joint; and
a cutting step of cutting the bottom portions and the side portions of the flange members in a manner so that parts of the bottom portions remain,
wherein the flange members are left remaining with a protruding amount whereby a joint strength of the joint obtained from a tensile test becomes greater than or equal to a tensile strength of the resin material.
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