MIL-DTL-11733E
b. Electrochemical chemical cleaning methods such as electrolyte alkaline,
electropolishing, or electrolytic pickling.
c. Mechanical methods such as blasting, chipping, wire brushing, or grinding.
3.8.1.1 Blasting. Where blasting is appropriate, blast in accordance with SSPC-SP6,
unless SSPC-SP5 or SSPC-SP10 is specified (see 6.2). Blasting shall not be used on surfaces
that could be damaged by blasting or on components containing such surfaces unless protective
masking has been applied.
3.8.2 Treatment. Cylinders shall be treated as soon as possible after cleaning (see 3.8.1)
with zinc phosphate chemical conversion coating in accordance with MIL-T-490, type I.
3.8.3 Painting. Coatings shall be applied in an ambient temperature of not less than
50 °F (10 °C) nor more than 90 °F (32 °C). Paint shall be applied by any method that will deposit
the specified film coat thickness (see 3.8.3.1 and 3.8.3.2) and comply with any applicable
transfer efficiency regulations. Paint and surface shall be approximately the same temperature
except when hot spray is used.
3.8.3.1 Primer. Primer conforming to SSPC-Paint 25 shall be applied to each dry, clean
cylinder as soon as practicable after cleaning and treatment (see 3.8.1 and 3.8.2). Dry film
thickness of primer shall be 0.7 to 1.0 one-thousandth of an inch (mil).
3.8.3.2 Finishing coat. A finishing coat conforming to MPI Reference 9 shall be applied
to each cylinder, color conforming to the cylinder color code requirement of MIL-STD-101. The
dry film thickness of finishing coat shall be 1.0 to 1.5 mil.
3.9 Workmanship. Cylinder, valves, flanges, and caps shall be clean and free from grit
and loose scale. Edges shall be rounded or chamfered. Cylinders shall be clean and free of other
surface defects detrimental to the intended use.
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are
classified as conformance inspection.
4.2 Examination. Each cylinder shall be examined for defects as listed in table II. The
presence of one or more defects shall be cause for rejection.
4.2.1 Tests. All tests shall be completed within one year from the date of acceptance by
the government.
4.2.1.1 Lot. A lot shall consist of not more than 200 cylinders produced from the same
heat of steel, with the same treatment cycle, offered for delivery at the same time.
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