MIL-R-17852 Reducer, Oxygen Pressure $S/S By Sae-As17852$

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MIL-R-17852C(AS)

4.5 Test condition.

4.5.1 Temperature and pressure. Unless otherwise specified, tests

shall be conducted at local ambient temperature arid barometric pressure.

The temperature and barometric pressure shall be recorded at the time of

inspection. This information shall be available for computation of test

data, where required, to normal temperature and pressure (NTP) conditions.

NTP conditions are 29.92 inches of mercury (101.3kPa) and 21�C (70�F).

Test instruments shall be calibrated or adjusted according to their

required usage in conducting individual tests.

4.5.2 Gas. Unless otherwise specified, the gas used in testing the

reducers sha11 be oxygen conforming to MIL-O-27210, type I. When specified,

nitrogen conforming to BB-N-411, type I, class I, grade B, or air

conforming to BB-A-1034, may be used.

4.5.3 Orientation. When subjected to the test specified in 4.6.3,

the reducers shall be positioned with the centerline of the passage

parallel to a vertical plane. Each consecutive reducer tested shall be

rotated 90 degrees and 180 degrees about an axis perpendicular to the

vertical plane. The rotation shall always be in the same direction.

4.6 Inspection methods.

4.6.1 Visual examination.

4.6.1.1 Reducer. Every reducer shall be examined visually for critical

defects to determine conformance to this specification. Every reducer,

selected as a sample unit from the lot, shall be visually examined for

minor defects to determine conformance to this specification. The

classification of defects, table II, shall be used to classify the

defects found.

4.6.1.1.1 Dimensions. The reducers shall be checked dimensionally to

determine conformance to the dimensions specified herein.

4.6.1.2 Packaging. Each of the fully prepared shipping containers$

containing reducers of one type, selected as a sample unit from the lot,

shall be examined to determine that the packaging$ packing, and marking

conform to this specification. The classification of defects, table

III, shall be used to enumerate the defects found.

4.6.2 Leakage. The outlet of the reducer shall be sealed with a

suitable plug. The reducer shall be actuated and a pressure of 1800

psig shall then be applied to the inlet of the reducer and maintained

for a period of 15 minutes. The reducer shall pass the requirements

specified in 3.6.1.

4.6.3 Pressure and flow.

4.6.3.1 Type I. The reducer shall be preset at 80 psig and the inlet

connected to an oxygen pressure source. The reducer shall then be

subjected to an inlet pressure of 2400 psig and the flow at the reducer