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|  MIL-I-52997(ME)
3.7.1 Stenciling. The nomenclature and identification marking, as shown on
the drawings, shall be stenciled near the center of each fixture. The letters
shall be gothic capitals, and the numerals shall be 2 inches high where space
permits. On small components, the stenciling shall be as large as practicable.
3.7.2 Instruction plates. Each kit shall be equipped with an instruction
plate giving reference to the retrofit kit installation manual. The instruction
plate shall conform to MIL-P-15024/6. The plate shall be attached by screws,
bolts, or rivets in a location where the plate will be both visible and legible.
3.8 Workmanship. Each installation fixture shall be clean and free from
sand, dirt, fins, pits, scale, corrosion, burrs, sharp edges, cracks, poor or
unsound welds, or any other defects that could impair the mounting of the kit.
3.8.1 Metal fabrication. Metal used in fabrication shall be free of kinks
and sharp bends. The straightening of material shall be done by methods that
will not cause injury to the material. Corners shall be square and true. All
bends shall be made with controlled means to ensure uniformity of size and.
shape. Precaution shall be taken to avoid overheating. Heated aluminum shall
be allowed to cool by natural convection. External surfaces shall be free from
burrs, sharp edges, and corners, except when sharp edges or corners are required
or where they are not detrimental to safety.
3.8.2 Welding. The surfaces of parts to be welded shall be free from rust,
corrosion, scale, paint, grease, and mill scale that can be removed by chipping
and wire brushing, and other foreign matter. Welds shall withstand stress
without permanent deformation or failure when the parts connected by the welds
are subjected to proof and service loading. 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 3/16 inch unless appropriate bridging techniques are
used. The welding process used in fabrication of fixtures shall be in
accordance with TA13222EOO09. No deviations from these requirements are
permissible without prior Government approval.
3.8.2.1 Welders. Before assigning any welder to manual welding work covered
by this specification, the contractor shall provide the contracting officer with
certification that the welder has passed qualification tests as prescribed by
either of the following listed codes for the type of welding operations to be
performed and that such qualification is effective as defined by the particular
code:
AWS D1.1, Structural Welding Code, Section 5, Qualification.
ASME Boiler and Pressure Vessel Code, Section IX, Welding Qualifications.
Contractors who make only horizontal welds need not qualify welders for "all
position welding." Subject to approval by the Government, the contractor's
standard welder qualification may be substituted for the above codes provided
that the contractor's procedure is equivalent to the above codes. The
contractor shall be responsible for determining that automatic welding equip
ment operators are capable of producing quality welds i.n accordance with AWS or
ASME codes.
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