Ordinance on Safety of Boilers and Pressure Vessels
Ministry of Labour Ordinance No.33 of September 30, 1972
Latest Amendments:
Ministry of Health, Labour and Welfare Ordinance No. 171 of July 16, 2001
In Japanese
Chapter II. Boilers
Section 3. Boiler Rooms
(Place Where Boiler Is Installed)
Article 18. The employer shall, with regard to the boiler (excluding the mobile boiler and the outdoor type boiler, hereinafter the same in this Section) install it in the exclusive use building or at the place where partitioned by the barrier in the building (hereinafter referred to as the "boiler room"). However this provision shall not apply to the boiler of which heating surface calculated in accordance with the provision of Article 2 (hereinafter referred to as "heating surface") is 3 or less.
(Entrance of Boiler Room)
Article 19. The employer shall provide two or more entrances to a boiler room, provided that this shall not apply to a boiler room where there is no difficulty of evacuating boiler operators in a case of emergency.
(Installing Position of Boiler)
Article 20. The employer shall maintain a distance from the top of a boiler to the structures located above a boiler such as ceiling, piping and so forth of 1.2 m or more, provided that this shall not apply to the cases when no difficulty is expected in inspection and handling of safety valves and other fittings.
2. The employer shall, with regard to a boiler of which the body is not covered and a vertical boiler, in addition to the provision of the preceding paragraph, maintain a distance from the outer wall of the boiler to the structures located beside the boiler such as walls, piping and so forth (excluding those having no difficulty for inspection and cleaning) of 0.45 m or more. However, for the boiler of which the inside diameter of the shell is 500 mm or less and its length is 1,000 mm or less, this distance shall be 0.3 m or more.
(Distance between Boiler and Inflammable Substances)
Article 21. The employer shall, with regard to the inflammable substances within 0.15 m or less from the outside of a boiler, or metallic chimneys or flues attached to boilers (hereinafter referred to as "boilers, etc." in this paragraph), cover them with incombustible substances other than metals, provided that this shall not apply to the cases when boilers, etc., are covered by the incombustible substances other than metals having the thickness of 100 mm or more.
2. When the employer stores fuel in a boiler room or other places where a boiler is installed, he shall place the fuel at a distance from the outside of a boiler of 2 m (for the solid fuel, 1.2 m) or more, provided that this shall not apply to the cases when a suitable barrier is provided between the boiler and the fuel or fuel tanks or when other measures to prevent fire are established.
(Measures to Monitor the Exhaust Gas from the Boiler)
Article 22. The employer shall take measures such as installation of windows for observing the situation of exhaust gas from the chimney, in order to allow the operations chief of boilers to easily monitor whether combustion continues normally or not.
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