MIL-S-22824E
contaminating substances. As soon as practicable after cleaning, and before any
corrosion product or other contamination can result, the surfaces shall be
prepared or treated to insure the adhesion of the coating system. The painting
shall consist of at least one coat of primer and one finish coat. The primer
shall be applied to a clean, dry surface as soon as practicable after cleaning
and treating. Painting shall be with manufacturer's current materials according
to manufacturer's current processes and the total dry film thickness shall be
not less than 2.5 roils over the entire surface. The paint shall be free from
runs, sags, orange peel, or other defects.
3.15.1
Treatment.
All zinc-coating shall conform to ASTM A 123.
3.16 Workmanship.
3.16.1 Sling fabrication. The material used in fabrication shall be free
from kinks, sharp bends, and other conditions which would be deleterious to the
finished product. Manufacturing processes shall not reduce the strength of the
material to a value less than intended by the design. Manufacturing processes
shall be done neatly and accurately. All bends shall be made by controlled
means to insure uniformity of size and shape.
3.16.2 Bolted connections. Bolt holes shall be accurately punched or
drilled and shall have the burrs removed. Washers or lockwashers shall be
provided in accordance with good commercial practice, and all bolts, nuts, and
screws shall be tight.
3.16.3 Forgings. Forgings shall be properly shaped and free from fins,
cracks, nicks, flaws, seams, and any other injurious defects which might affect
the serviceability of the hook or pear link. Tolerances and gages for metal
fits shall conform to standards of commercial practice. Finished contact and
bearing surfaces shall be true and exact. Carbon steel forgings shall conform
to ASTM A 668.
3.16.4 Welding. Welding procedures shall be in accordance with AWS D1.1.
Finish welds shall be dye penetrant tested in accordance with ASTM E 165. The
surface of parts to be welded shall be free from rust, scale, paint, grease, or
other foreign matter. Welds shall be of sufficient size and shape to develop
the full strength of the parts connected by the welds. Welds shall transmit
stress without permanent deformation or failure when the parts connected by the
weld are subjected to proof and service loadings.
3.16.5 Castings. All castings shall be sound and free from patching,
misplaced coring, warping, or any other defect which reduces the casting's
ability to perform its intended function.
3.16.6 Splice efficiency. All wire rope splicing and application of swaged
sleeves shall be done in a manner to assure efficiencies of 95 percent of the
wire rope nominal breaking strength (refer to RR-W-410) at the joint for wire
rope diameters up through 1-inch, 92.5 percent for wire rope diameters 1-1/8
through 2 inches, and 90 percent for wire rope diameters of 2-1/8 inches and
above. No severed strands or kinks shall be permitted.
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