MIL-PRF-12732F
conform to A-A-50271, composition C. Plates shall be attached by screws, bolts or rivets,
whenever possible. When not possible or practical, warning and cautions may be attached with
adhesive conforming to MMM-A-16l7, type II or III, in a conspicuous protected location.
3.18 Treatment and painting. The portions of the hypochlorination unit normally painted
internally and externally shall be cleaned, treated, and painted in accordance with MIL-T-704,
type F or G, as applicable. Unless otherwise specified (see 6.2), top coat color shall be Tan
686A, #33446 of FED-STD-595 conforming to MIL-DTL-53072.
3.19 Accessory box. The equipment shall be provided with an accessory box 10 inches
by 7 inches by 7 inches, fabricated from aluminum conforming to ASTM B209, Alloy 6061,
Temper 0 to T6; or Alloy 5052, Temper 0 to H34 having a nominal thickness of not less than
0.071 inch; or steel conforming to ASTM A1011/A1011M having a nominal thickness of no less
than 0.075 inch. The accessory box shall have a hinged lid and a lockable lid latch of a type that
will keep the lid closed when subjected to vibration or rough handling. The accessory box shall
be securely fastened to the equipment.
3.20 Workmanship.
3.20.1 Fabrication. Metal used in the 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 materials 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 ensure uniformity of size and shape.
3.20.2 Castings. Castings shall be sound and free from patching, misplaced coring,
warping, porosity, blowholes, or other defects which might render the casting unsound for its
intended use.
3.20.3 Welding and welders.
3.20.3.1 Welding. The surfaces of parts to be welded shall be free from rust, scale, paint,
grease, mill scale that can be removed by chipping and wire brushing, and other foreign matter.
Welds shall transmit stress without permanent deformation or failure when the parts connected
by the welds are subjected to proof and service loading. Parent materials, weld filler metals, and
fabrication techniques shall be as required to enable the unit to conform to the examination and
test requirements specified in section 4. Parts to be joined by fillet welds shall be brought into as
close contact as possible and in no event shall be separated by more than 0.1875 inch unless
appropriate bridging techniques are used. We1dments, including weld beads, shall be of
homogeneous appearance and form without spattering or other irregularities, complying with the
size, configuration and other dimensional requirements to develop the full strength of the parts
joined by the welds. No cracks of any type are permitted. All welding is to be produced by
either AWS or ASME code qualified welders, and welds shall be in accordance with the same
code. Unless otherwise specified (see 6.2), the welding process used in fabrication of the unit
shall be at the option of the contractor.
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