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

(c) After acceptable samples are obtained, the cleaning solvent shall be removed by draining and then purging with low pressure nitrogen. A vacuum pump may be used in the final stages of solvent removal. Heat (200EF maximum) may be applied to the external surfaces of the piping to facilitate removal of the cleaning solvent. The nitrogen exhaust shall be checked for traces of the cleaning solvent with a halide leak detector or equal. Evacuating and purging shall continue until no trace of the solvent is detectable.

(d) The system shall be pressurized with nitrogen to a minimum of 75

lb/in2

or the maximum system operating pressure if lower. Samples

of nitrogen under pressure shall be taken after a period of not less than 1 hour and analyzed for solvent content. Samples shall be analyzed by gas chromatography or equivalent methods. The solvent content shall not exceed 10 ppm. If this limit is exceeded, the system shall be purged with nitrogen until acceptable samples are obtained.

5.8.3.5 Maintenance of pressure in system. The system shall be maintained with not less than 10 lb/in2, or the maximum system operating pressure if lower, of nitrogen until the system is charged with oxygen or nitrogen. If the pressure

should drop below 10 lb/in2

before charging, the responsible authority shall

investigate circumstances associated with the pressure drop to ensure that no contamination could have entered the system which would require repeating the flush.

5.9 Testing.

5.9.1 Pressure testing. Piping and components defined by the boundaries of

1.2 shall be pressure tested (hydrostatic, joint tightness, seat tightness, and

pressure drop) as specified in tables V through VIII. Flexible hoses shall be

tested in accordance with NAVSEA S6430-AE-TED-010. When contractually invoked, or

otherwise specified by NAVSEA, the test requirements of NAVSEA SS800-AG-MAN-010/P-

9290 or NAVSEA SS521-AA-MAN-010, or other NAVSEA approved procedure shall take

precedence over tables V through VIII.