It is the top of this page

About dangerous materials fire of the third kind

Last update date February 1, 2019

Summary

We catch fire and fire neighboring inflammables, and, as for the fire that the metal-based third kind dangerous materials including lithium and potassium become ignition source, injured may occur when we take the wrong handling method even if dangerous materials which are ignition source are very small amounts.


Because dangerous materials of the third kind have property of spontaneous combustion characteristics and taboo aquosity, and fire extinguishing method is limited, it is necessary for appropriate fire extinguishing to work using fire extinguishing drug which coped with the material precisely when fire occurs once.


All of the offices handling dangerous materials of the third kind would appreciate your carrying out appropriate management and the handling thoroughly with reference to the following item.

About fire example caused by dangerous materials of the third kind

Lithium (Li) fire

After cleaning lithium which attached in lithium furnace in the research facility, we ranked water by mistake, and flame and spark occurred with explosion and fired neighboring inflammables, and injured occurred.

Potassium (K) fire

After washing potassium in test bed with toluene in the research facility, we ranked water by mistake and caught fire and fired neighboring inflammables.

About characteristic of dangerous materials of the third kind and the handling

It is solid or liquid and, with dangerous materials of the third kind, self-ignites in air () such as spontaneous combustion-related material (, e.g., yellow phosphorus) and it touches with water and catches fire or produces the combustibility gas (taboo water-related material (, e.g.,) such as lithium) and has both spontaneous combustion characteristics and taboo aquosity, and there is () such as spontaneous combustion-related material and taboo water-related material (, e.g., sodium or potassium).


About storage, the handling and transportation, spontaneous combustion-related material avoids approach, heating with fire source, and it is necessary to prevent that we touch with air. In addition, it is necessary for taboo water-related material to avoid contact with water, and it is wished we subdivide storage. Consideration not to put inflammables in the neighborhood is necessary for both materials.

About fire extinguishing method of dangerous materials of the third kind

Thing said to be generally effective in fire extinguishing of the third kind dangerous materials has dry sand, the expansion hiru stone or the expansion pearlite.

About reports to firefighting when we handle dangerous materials of the third kind

With dangerous materials in the Fire Services Act, designated amount is determined by cabinet ordinance about regulation of dangerous materials. Designated amount of dangerous materials of the third kind becomes 300 kg from 10 kg by difference in article name and property.


When we store dangerous materials or we handle, permission or report are necessary by the amount.

  1. When with the ratio for designated amount 1 or more, it is permission by ... Fire Services Act or approval
  2. In the case of less than 1, the ratio for designated amount is report by ... Yokohama-shi fire prevention regulations (a little dangerous materials) more than 0.2

In addition, we will add up the ratio for each designated amount when we store plural dangerous materials or we handle.

Inquiry to this page

The Fire Bureau prevention department preservation section

Telephone: 045-334-6407

Telephone: 045-334-6407

Fax: 045-334-6610

E-Mail address [email protected]

Return to the previous page

Page ID: 317-622-579

We come back to the top