(a) Boilers shall be equipped with guarded, well-maintained water
gages and pressure gages placed so that they can be observed easily. Water
gages and pipe passages to the gages shall be kept clean and free of scale
(b) Boilers shall be equipped with automatic pressure-relief valves;
valves shall be opened manually at least once a week to determine that they
will function properly.
(c) Blowoff valves shall be piped outside the building and shall have
outlets so located or protected that persons passing by, near, or under them
will not be scalded.
(d) Boiler installations shall be provided with safety devices,
acceptable to the Mine Safety and Health Administration, to protect against
hazards of flameouts, fuel interruptions, and low-water level.
(e) Boilers shall be inspected internally at least once a year by a
licensed inspector and a certificate of inspection signed by the inspector
shall be displayed in the vicinity of the boiler.
U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939 www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401