Mich. Admin. Code R. 408.10836 - Testing

Rule 836.

(1) An extinguisher shall receive an approved hydrostatic test every 5 years, except for dry chemical extinguishers with brazed brass, aluminum, or mild steel shells; bromotrifluoromethane extinguishers; and dry powder extinguishers for metal fires, which shall be tested every 12 years. The hydrostatic test date shall be recorded on a suitable metallized decal or equally durable material which has been affixed by a heatless process to the shell of the extinguisher and which shows the date of the test, test pressure, and the name of the person or agency making the test. An extinguisher tested after July 5, 1974, shall have a label which will not retain its original condition when removal from an extinguisher is attempted. An extinguisher manufactured under the Untied States department of transportation specifications incorporated in subrule (2) of this rule may have the inspection date and the serviceman's or firm's name, initials, or symbol stamped into the cylinder.
(2) An extinguisher, cylinder, or cartridge used for storage of a compressed gas, manufactured as prescribed by United States department of transportation specifications, shall be hydrostatically tested in accordance with the United States department of transportation regulations prescribed in 49 C.F.R. Part 179 to 190, 2004 edition, which are incorporated herein by reference.
(3) A nitrogen cylinder or other cylinder for inert gas, such as on a wheeled extinguisher, shall be tested at not less than 5 year intervals.
(4) The hose and couplings on an extinguisher equipped with a shut-off nozzle at the outlet end of the hose shall have a hydrostatic test interval prescribed for the unit on which the hose is installed.
(5) A dry chemical and dry powder hose assembly requiring a hydrostatic test shall be at a test pressure of 300 pounds per square inch for 1 minute. A carbon dioxide hose assembly requiring a hydrostatic test shall be at a test pressure of 1,250 pounds per square inch for 1 minute. Such hoses shall be tested within a protective cage.
(6) An extinguisher subjected to an original factory test pressure of 350 pounds per square inch or more shall be tested at 75% of the factory test pressure, but not less than 300 pounds per square inch (see table 5).
(7) Table 5 reads as follows:

Table 5

Hydrostatic Test Pressure Requirements Non-ICC Shells

Shells Not Specified in U.S. Department of Transportation Regulations

EXTINGUISHER TYP E
ORIGINAL FACTORY TEST PRESSURE REQUIRES HYDROSTATIC TEST PRESSURE
All Dry Chemical and Dry Powder 400 psi or greater 75% of factory test pressure
350-399 psi below 350 psi 300 psi 75% of factory test pressure
Foam 500 psi factory test 500 375
Foam 350 psi factory test 350 300
Stored-Pressure or Cartridge-Operated Water-Type (including Anti-Freeze and Loaded-Stream) 400 psi or greater 350-399 psi below 350 75% of factory test pressure 300 psi 75% of factory test pressure

Notes

Mich. Admin. Code R. 408.10836
1979 AC; 1980 AACS; 1984 AACS; 2006 AACS

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