MIL-STD-1330-SUP-2 Precision Cleaning and Testing of Shipboard Oxygen, Helium, Helium-Oxygen, Nitrogen, and Hydrogen SystemsThis standard provides the requirements for precision cleaning and testing of oxygen or oxygen-enriched systems and components; oxygen generating plants including nitrogen, hydrogen, and demineralized water support systems and components; and helium, helium-oxygen, and hydrogen life support systems and components. Each activity will implement the applicable requirements of this document through a locally prepared and approved procedure. Activities subject to additional quality assurance requirements such as NAVSEA SS800-AG-MAN-010/P-9290 or NAVSEA SS521-AA-MAN-010 will obtain procedure approval from the applicable certifying activity.

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MIL-STD-1330D(SH)

20 September 1996

5.13.1.4  Swipe method.  The surface shall be swiped with at least two movements with filter paper or a clean swipe cloth as specified in 3.6.  Any evidence of oil, grease, ink, dye, particulate, or fibers shall be cause for rejection.  Note that the swipe method is limited to surfaces with areas no less

than 100 cm2

(16 in2).

5.13.2  Hydrocarbon and NVR analysis methods.

5.13.2.1  Applicability.  All aqueous cleaning processes using NOC as a final cleaner shall check for the presence of excessive foam using the shake test specified in 5.13.2.2.  Depending on the final cleaner, one of the analytical methods specified in table X shall be used to quantitatively determine the concentration of hydrocarbons (oil and grease) or non-volatile residue (NVR) in

the final cleaner.

TABLE X.  Hydrocarbon and NVR analysis methods.

1/ When measuring hydrocarbon or NVR contamination, negative results are possible.        These results are acceptable and should be reported as less than 1 ppm.

2/ The preferred method of analyzing NOC is as specified in 5.13.2.3.

5.13.2.2  Shake test.  A half-full capped sample container of not less than

250 mL shall be vigorously agitated for not less than 5 seconds, then allowed to

stand undisturbed for 5 minutes.  Any evidence of bubbles remaining on the surface

shall be cause for rejection.  The shake test is useful in detecting the presence

of some soluble organic contaminants such as hydrocarbon surfactants in low

foaming inorganic solutions such as NOC.  As an example, NOC with only 5

milligrams per liter (mg/L) NID will develop a stable foam visible after 30

minutes.  The presence of foam is often the result of carry-over from a pre-clean

step.  However, the shake test is used only to determine the presence of organic

or particulate contamination.  A shake test will not detect insoluble organic

contaminants such as oil or grease, and, therefore, shall not be used to establish

the absence of organic contaminants.

5.13.2.3  Non-volatile residue in NOC.  The concentration of NVR in NOC shall be determined as specified in appendix B.

5.13.2.4  Solvent extraction of aqueous cleaners.  As specified in appendix C, this method serially extracts a homogenized sample of TSP solution or NOC with three 30 mL or 160 mL volumes of NAVSEA approved halogenated solvent, and subsequently dilutes the extract to either 100 mL or 500 mL.  The extract is then analyzed as specified in 5.13.2.5 or 5.13.2.6.

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