MIL-PRF-87896A
CONTENTS
PAGE
PARAGRAPH
1
SCOPE ..................................................................................................................................... 1
1.1
Scope........................................................................................................................................ 1
1.2
Classification............................................................................................................................. 1
2
APPLICABLE DOCUMENTS ................................................................................................... 1
2.1
General ..................................................................................................................................... 1
2.2
Government documents ........................................................................................................... 1
2.2.1
Specifications, standards, and handbooks ............................................................................... 1
2.3
Non-Government publications .................................................................................................. 1
2.4
Order of precedence................................................................................................................. 2
3
REQUIREMENTS..................................................................................................................... 2
3.1
Chemical composition and physical properties ........................................................................ 2
3.2
Limiting values .......................................................................................................................... 2
3.3
Filled containers ....................................................................................................................... 2
3.3.1
Cylinders ................................................................................................................................... 2
3.3.2
Filling pressure ......................................................................................................................... 2
3.3.3
Leakage .................................................................................................................................... 2
3.3.4
Identification tag ....................................................................................................................... 2
4
VERIFICATION
4.1
Classification of inspections ..................................................................................................... 3
4.2
Conformance inspection ........................................................................................................... 3
4.2.1
Individual tests .......................................................................................................................... 3
4.2.1.1
Filling pressure ......................................................................................................................... 3
4.2.1.2
Leakage .................................................................................................................................... 3
4.2.2
Sampling for tests ..................................................................................................................... 3
4.3
Sampling plan ........................................................................................................................... 4
4.3.1
Lot ............................................................................................................................................. 4
4.3.1.1
Sample size .............................................................................................................................. 4
4.3.1.2
Sampling method...................................................................................................................... 4
4.4
Rejection ................................................................................................................................... 4
4.5
Test Methods ............................................................................................................................ 4
4.5.1
Purity......................................................................................................................................... 4
4.5.2
Tetrafluoromethane, carbon dioxide, nitrous oxide, and sulfur hexafluoride ........................... 5
4.5.2.1
Instrument parameters ............................................................................................................. 5
4.5.2.2
Calibration................................................................................................................................. 5
4.5.2.3
Procedure ................................................................................................................................. 5
4.5.2.4
Calculation ................................................................................................................................ 5
4.5.3
Oxygen + argon, nitrogen, and carbon monoxide .................................................................... 5
4.5.3.1
Instrument parameters ............................................................................................................. 6
4.5.3.2
Calibration................................................................................................................................. 6
4.5.3.3
Procedure ................................................................................................................................. 6
4.5.3.4
Calculation ................................................................................................................................ 6
4.5.4
Total reactive fluoride as HF..................................................................................................... 6
4.5.4.1
Fluoride ion selective electrode ................................................................................................ 6
4.5.4.1.1
Buffer solution........................................................................................................................... 6
4.5.4.1.2
Calibration standard ................................................................................................................. 6
4.5.4.1.3
Procedure ................................................................................................................................. 7
4.5.4.1.3.1
Calibration curve....................................................................................................................... 7
4.5.4.1.3.2
Sample preparation .................................................................................................................. 7
4.5.4.1.3.3
Measurement............................................................................................................................ 7
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