MIL-S-24744(SH)
3.3.5.6 Sand and dust. The function of operating parts shall not be impaired by exposure to
the sand and dust test, method 510.2 of MIL-STD-810.
3.3.5.7 Salt atmosphere and humidity. The scrubber shall operate satisfactorily during and
after exposure to the salt fog test, method 509.2 of MIL-STD-810, and in humidity ranging from
10 to 100 percent.
3.3.5.8 Ice and snow. The scrubber shall start and operate and shall withstand, without
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permanent deformation or damage to any component, snow or ice loads of up to 15 ib/ft .
3.3.5.9 Noise. The maximum average sound level generated by the scrubber, when operated
at rated capacity or load, shall not exceed 90 decibels A-weighted (dBA) when measured at the
operator's position and at a distance of 15 feet from the equipment at a minimum of 8 positions
at 45 degree radials.
3.4 Construction.
3.4.1 Materials, processes, and parts. Materials and parts which are not specified or which
are not covered by documents listed herein shall be of the best quality, commercially available,
standard parts complying with FED, MIL, or SAE specifications. Processes which are not definitely
specified or which are not covered by documents listed herein shall be in accordance with
nationally recognized standards (such as AWS, SAE, and so forth). All parts and materials needed
to fabricate, assemble, and finish the scrubber shall be furnished by the manufacturer.
3.4.1.1 Recovered materials. Unless otherwise specified herein, all equipment, material, and
articles incorporated in the products covered by this specification shall be new and may be
fabricated using materials produced from recovered materials to the maximum extent practicable
without jeopardizing the intended use. The term "recovered materials means materials which have
been collected or recovered from solid waste and reprocessed to become a source of raw materials,
as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use
of used or rebuilt products is allowed under this specification unless otherwise specified.
3.4.1.2 Asbestos, magnesium and cadmium. The manufacturer shall use materials in the
construction of the scrubber and accessories that are free of asbestos, magnesium, and cadmium
(see 6.3).
3.4.1.3 Corrosion prevention. Metals exposed to sea water environments shall be corrosion
and stress-corrosion resistant or shall be processed to resist corrosion and stress-corrosion.
Irrespective of the metals involved, all exposed edges shall be sealed with a suitable sealant
material conforming to MIL-S-8802.
3.4.1.3.1 Galvanic corrosion. Joining or coupling of dissimilar metals which are widely
separated in the galvanic series should be avoided, if possible. When dissimilar metals must be
joined, the juncture surfaces shall be protected in accordance with MIL-STD-889.
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