MIL-STD-1330 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)

w/ Change 1

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.

TABLE V. Hydrostatic testing.

Attribute	Requirement
Applicability	New or major repaired pipe and components, including replacement of pressure containing piece parts, shall be hydrostatically (strength and porosity) tested. Major repairs include any work/rework where the pressure containing boundary is affected by welding, brazing, machining, or a fabrication process which could affect the structural adequacy of the pipe or component. The following items are exempt from hydrostatic testing: isolatable pressure measuring devices such as pressure gauges, transducers, and pressure switches, valve packing, pump packing, pump mechanical shaft seals, mechanical joint bolting, valve stems, and storage tanks in support of oxygen-nitrogen plants.
When accomplished	Hydrostatic testing is normally accomplished before component cleaning or final system flushing. It shall be accomplished prior to tightness or operational testing. Hydrostatic testing on an oxygen clean component or system is allowed provided the following are met or accomplished: Water: The test equipment shall satisfy 1.2.4, the water shall be as specified in 4.6.2, and the component or system shall be dried as specified respectively in 5.2.6 and 5.5.10. Solvent: Testing for cleanliness and solvent removal shall be as specified in 5.8.3.4(b) and 5.8.3.4 (c). If the samples indicate that the system has been contaminated, the contaminated portion of the system shall be reflushed as specified in 5.8.
Test fluid	The test fluid is as specified in 4.6.
Test pressure	The test pressure is 150 percent of system maximum operating pressure, but not less than 50 lb/in2.
Test duration	Shop testing of components shall be for not less than 1 minute plus sufficient time for inspection. Testing conducted on piping or installed components shall be for not less that 15 minutes plus sufficient time for inspection.
Acceptance criteria	No leakage or permanent deformation.