Mich. Admin. Code R. 408.14553 - Furnaces
Rule 4553.
(1)
Cold or damp metal ingots shall be preheated and dried before being added to
molten metal.
(2) A furnace which
needs to be tilted for discharge shall have operating controls located outside
any splash area or the operator shall be protected by a splash
shield.
(3) A furnace tender shall
be not less than 2 feet from the furnace when tapping or plugging, or the
tender shall be protected by a splash shield.
(4) A gas or oil fired melting furnace
installed or modified after the effective date of this part shall be equipped
with a control system which shall:
(a)
Prohibit ignition and combustion until completion of a purge cycle which will
provide a minimum of 4 complete volume air changes in the ignition and
combustion chamber.
(b) Positively
and immediately shut off the fuel supply in case of a pilot light or combustion
failure, or flame failure where direct ignition to the burner is
used.
(5) A holding
furnace installed or modified after the effective date of this part shall be
equipped as prescribed in subrule (4)(b).
(6) The requirements of subrules (4) and (5)
do not apply to a gas or oil melting or holding furnace that employs explosion
resistant immersion tubes and where the products of combustion do not discharge
into a closed equipment work chamber or into a confined space.
Notes
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