METHOD FOR MANUFACTURING A TANK, AND A TANK THUS PRODUCED

摘要

There are disclosed a tank having a structure which achieves both a burst strength and a fatigue strength, and a manufacturing method of the tank. In order to realize this, in a tank comprising a liner (20), and an FRP layer (21) including a hoop layer (70P) and a helical layer (70H) formed by winding fibers (70) around the outer periphery of the liner (20), at least an innermost helical layer (70H) is formed as a smooth helical layer. When the smooth helical layer, i.e., a helical layer which does not have any unevenness or which has only little unevenness is formed, the unevenness can be prevented from being transferred to the hoop layer (70P) adjacent to the helical layer (70H). When structural bends (undulations) of the fibers (70) of the hoop layer (70P) are suppressed, a fatigue strength of the fibers (70) themselves can be enhanced.