[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR77]

[Page 639-640]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 77_MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK 
AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
              Subpart E_Safeguards for Mechanical Equipment
 
Sec.  77.413  Boilers.

    (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 and rust.
    (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

[[Page 640]]

inspector and a certificate of inspection signed by the inspector shall 
be displayed in the vicinity of the boiler.