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|  3.3.2 Dissimilar metals. Dissimilar metals shall not be used in intimate
contact with each other unless protected against galvanic corrosion. Dissimilar
metals and methods of protection are defined and detailed in MIL-STD-889 and
NAVFAC DM-39.
3.3.3 Identification of materials and finishes. The contractor shall
identify the specific material, material finish or treatment for use with
component and subcomponent, and shall make information available upon request to
the contracting officer or designated representative.
3.3.4 Recovered materials. For the purpose of this requirement, recovered
materials are those materials which have been collected from solid waste and
reprocessed to become a source of raw materials, as distinguished from virgin
raw materials. The components, pieces and parts incorporated in the compressor
may be newly fabricated from recovered materials to the maximum extent
practicable, provided the compressor produced meets all other requirements of
this specification. Used, rebuilt or remanufactured components, pieces and
parts shall not be incorporated in the compressor.
3.4 Environmental conditions.
3.4.1 Operation at extreme temperatures. The compressor shall operate as
specified herein under the following conditions.
3.4.1.1 Low temperatures. The compressor shall start and operate as
specified herein for not less than 2 hours at rated capacity in any ambient
temperature down to minus 25F.
3.4.1.2 High temperatures. The compressor shall start and operate as
specified herein at any ambient temperature up to plus 110F for not less than
8 hours at rated capacity.
3.4.2 Rain. The compressor shall start and operate as specified herein after
exposure to 1/2 hour of rainfall at a minimum rate of 3 inches per hour directed
simultaneously at all four sides and top. The compressor shall operate as
specified herein for 1/2 hour while the rain continues to fall at the minimum
rate of 3 inches per hour.
3.5 Safety. All reciprocating, rotating or moving parts of the compressor
shall be guarded when such parts are exposed to contact by personnel or
otherwise create a hazard. All hot surfaces of the compressor unit, including
exhaust pipes and other lines which may be subject to high temperatures, exposed
to contact by personnel or which create a fire hazard, shall be fully guarded or
insulated. Exhaust from the engine shall be directed so that it does not
endanger personnel, and so that the possibility of exhaust entering into the
compressor unit inlet is minimized. Electrical equipment, wires, and connectors
shall be effectively guarded or insulated to protect all persons and objects
from electrical shock hazard. Nonfunctional sharp edges, projecting points, and
excessive length of fastening devices shall be avoided.
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