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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58 - 59 - 60 - 61 - 62 - 63 - 64 - 65 - 66 - 67 - 68 - 69 - 70 - 71 - 72 - 73 - 74 - 75 - 76 - 77 - 78 - 79 - 80 - 81 - 82

Attribute

Requirement

Applicability

New or repaired pipe and components, including flasks, shall be joint tightness tested.  Repairs are any work/rework which could affect the pressure containing ability of the item such as welding, brazing, replacement of software, or disturbance of mechanical joints.

When accomplished

Joint tightness testing is normally accomplished after component or system cleaning and prior to operational testing.

Test fluid

The test fluid is as specified in 4.6 or 4.7.

Test pressure

The test pressure is 100 percent of system maximum operating pressure.

Test duration

Shop testing shall be for not less than 5 minutes.  Testing conducted in the as-installed configuration shall be not less than 15 minutes soak time plus sufficient time for inspection.

Acceptance criteria

Testing with nitrogen or oxygen:

No leakage is allowed while monitoring accessible joints for leakage using methods such as full immersion or using leak detection solution in accordance with MIL-L-25567, or equal.  Leakage is identified by individual bubbles forming which are visible with the naked eye.

Testing with helium:

The maximum allowable leakage rate is 0.6 standard cubic centimeters per minute (sccm) past valve stem seals while monitoring accessible joints for leakage using methods such as full immersion or using leak detection

solution in accordance with MIL-L-25567, or equal.  Leakage is identified by the formation of individual bubbles visible under white light inspection.  An electronic leak detector, such as USON, may be used at

the beginning and end of the joint tightness test.

Testing with water:

No leakage is allowed.

Attribute

Requirement

Applicability

New or repaired valves and regulators shall be seat tightness tested. Repairs are any work/rework which could affect the ability of the valve or regulator to remain seat tight such as machining of the seat area or replacement of the seat.

When accomplished

Seat tightness testing is normally accomplished after component cleaning or final system flushing and prior to operational testing.

Test fluid

The test fluid is as specified in 4.6 or 4.7.

Test pressure

The test pressure is 100 percent of system maximum operating pressure.

Test duration

Shop testing shall be for not less than 5 minutes. Testing conducted in the as-installed configuration shall be the time necessary for the

minimum leakage to be detected at the point of observation or monitoring.

Acceptance criteria

Pressure shall be applied in the direction tending to unseat globe or needle valves, in the check direction for check valves, and in pressure holding direction for ball valves.

Testing with nitrogen or water:

Leakage shall be zero or as specified by the applicable military or

manufacturer specification.

Testing with helium:

The maximum allowable leakage rate is 0.6 sccm or as specified by the

applicable military or manufacturer specification.