Program Policy Manual - VOLUME V - Mine Safety and Health ...

MSHA PROGRAM POLICY MANAUL VOLUME V
13C."
Hoses manufactured during 1970, 1971, and 1972 with Biltrite
Compound 22107 will be recognized and accepted as complying
with paragraph (c) of this Section even though they are not
marked 2G-13C.
The examples of the code letter identifications of
Stratoflex 212 and 215 hoses are:
Stratoflex 212-8 H-4-V
Stratoflex 215-8 H-4-V
The numbers "212" and "215" identify the type hose, "-8" is
the specific size (other members may appear in this location),
"H-" indicates the hose was manufactured at Hohenwald,
Tennessee, and "V" indicates the year of manufacture as 1970.
"W" and "X" indicate 1971 and 1972, respectively.
"Where appropriate," as used in paragraph (d) of this Section,
calls attention to the fact that most manufacturers'
specifications refer to surface installations and, on
occasion, these specifications may not be appropriate for
underground installations. This determination will have to be
made on a mine-by-mine basis by the district manager.
75.1107-4 Automatic Fire Sensors and Manual Actuators;
Installation; Minimum Requirements
The "50 square feet of top surface area," referred to in this
Section means the 50 square feet of top surface area and does
not include the side surfaces of the machine or its
components.
Heat detecting Protector Wire is acceptable as a sensor in
minimum lengths of 12 inches, provided the wire is properly
secured by soldering or other substantial means.
To be effective, all heat detecting sensors, including
sprinklers, must be kept free of oil, grease, rock dust, and
other materials that may have an insulating effect.
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