MEDIUM-SIZED CONTAINER, AND METHOD FOR USE OF MEDIUM-SIZED CONTAINER

PROBLEM TO BE SOLVED: To provide a medium-sized container in which generation risk of damage or consumption of a metal cap part is reduced, and a method for use of the medium-sized container.SOLUTION: This medium-sized container is a medium-sized container made of a stainless steel of which a volume is not less than 100 L and not more than 300 L. The medium-sized container comprises: a container member including a container body part 10 and a metal cap part 20; a closing member 40 which is mounted to the metal cap part 20; and a seal ring 50 which is located between the metal cap part 20 and the closing member 40. The metal cap part 20 is provided with a first screw thread 23, and the closing member 40 is provided with a second screw thread 43 which is engaged with the first screw thread 23. The metal cap part 20 contains an austenitic stainless steel, and the closing member 40 contains a two-phase stainless steel of austenite-ferrite system.SELECTED DRAWING: Figure 6 【課題】口金部における損傷または消耗の発生リスクが低減された中型容器および中型容器の使用方法を提供する。【解決手段】中型容器は、容量が１００Ｌ以上３００Ｌ以下のステンレス鋼製の中型容器である。中型容器は、容器本体部１０と口金部２０を含む容器部材と、口金部２０に装着される閉鎖部材４０と、口金部２０と閉鎖部材４０との間に配置されるシールリング５０とを具備する。口金部２０には、第１ねじ山２３が設けられ、閉鎖部材４０には、第１ねじ山２３に螺合する第２ねじ山４３が設けられている。口金部２０は、オーステナイト系ステンレス鋼を含み、閉鎖部材４０は、オーステナイト−フェライト系２相ステンレス鋼を含む。【選択図】図６