The substance from which a combustible gas volatilizes, inexpensive, yet safe, mixed, to propose a handling method for storing, and the like.
To achieve the above object, when handled in the higher device of sealing level the substance from which a combustible gas volatilizes, air was introduced into the high unit of the sealing level, cause an explosion or fire volatilized combustible gas the combustible gas in a state diluted to no concentration is characterized in that the handle material to volatilize, and the handling of materials from which a combustible gas volatilizes.
According to handling of material combustible gas described above is volatilized, manufacture or purchase nitrogen required without using an inert gas such as carbon dioxide, to a concentration which does not cause an explosion or fire a combustible gas by the air since it adopts a method of diluting a substance from which a combustible gas volatilizes, inexpensive, yet safe, mixed, can be handled in the operation of the reservoir, and the like.