1、 1 MIL-PRF-87896A 04 January 2011 SUPERSEDING MIL-P-87896 NOTICE 2 14 October 2005 PERFORMANCE SPECIFICATION PROPELLANT, NITROGEN TRIFLUORIDE AMSC N/A FSC 9135 DISTRIBUTION STATEMENT AReactivated after (03Jan2011) and may be used for new and existing design acquisitions . Approved for public release
2、; distribution is unlimited. INCH-POUND Comments, suggestions, or questions on this document should be addressed to HQ Air Force Petroleum Agency (AFPET)/PTPT, 2430 C Street, Bldg 70, Area B, Wright-Patterson AFB OH 45433-7632 or e-mailed to AFPET.AFTTwpafb.af.mil. Since contact information can chan
3、ge, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87896A ii CONTENTS PARAGRAPH PAGE 1 SCOPE . 1 1.1 Scope 1 1.2
4、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 F
5、illed 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.
6、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
7、 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.
8、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 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87896A iii 4.5.4.1.3.4 Calculation 7 4.5.4.2 Fouri
9、er Transform Infrared Spectroscopy (FTIR) . 7 4.5.5 Water 7 4.5.5.1 Electrolytic 7 4.5.5.2 Piezoelectric . 7 5 PACKAGING 7 5.1 Packaging . 7 6 NOTES . 8 6.1 Intended use . 8 6.2 Acquisition requirements 8 6.3 Packaging requirements . 8 6.4 Subject term (key word) listing . 8 6.5 Changes from previou
10、s issue . 8 TABLE I Chemical composition and physical properties . 3 II Sampling for test . 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87896A 1 This specification is approved for use by all Departments and Agencies of the Department of
11、 Defense. 1. SCOPE 1.1 Scope1.2 . This specification covers the requirements for nitrogen trifluoride (NF3) propellant. ClassificationType I - Gaseous . Nitrogen trifluoride will be of the following type as specified (see 6.2): 2. APPLICABLE DOCUMENTS 2.1 General2.2 . The documents listed in this se
12、ction are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users a
13、re cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. Government documents2.2.1 . Specifications, standards, and handbooksDEPARTMENT OF DEFENSE SPECIFICATIONS . The following specifications, standa
14、rds and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. MIL-PRF-27407 - Propellant Pressurizing Agent, Helium DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1411 - Inspection an
15、d Maintenance of Compressed Gas Cylinders (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Bldg 4D, Philadelphia PA 19111-5094.) 2.3 Non-Government publicationsASTM INTERNATIONAL . The foll
16、owing documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM E29 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
17、ASTM F307 - Standard Practice for Sampling Pressurized Gas Analysis (Copies of these documents are available online at http:/www.astm.org or the ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken PA 19428-2959) Provided by IHSNot for ResaleNo reproduction or networking permitt
18、ed without license from IHS-,-,-MIL-PRF-87896A 2 KENNEDY SPACE CENTER KSC-SPEC-P-0022 - Solvent, Cleaning, 1,3-Dichloro-1,1,2,2,3-Pentafluoropropane, HCFC-225G, Specification For (Copies of this document is available online at http:/standards.nasa.gov/ or from NASA Technical Standards Program Office
19、, Marshall Space Flight Center, Marshall Space Flight Center, AL 35812). ASME INTERNATIONAL ASME B40.100-2005 - Pressure Gauges and Gauge Attachments (Copies of this document is available online at http:/www.asme.org/ or may be obtained from ASME Information Central Order/Inquiries PO Box 2300, Fair
20、field, NJ 07007-2300, (US/Canada (800)843-2763; outside North America (973)882-1170). 2.4 Order of precedence3. REQUIREMENTS . Unless otherwise cited herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document tak
21、es precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3.1 Chemical composition and physical properties3.2 . The chemical composition and physical properties of the propellant shall conform to Table I when tested in
22、 accordance with (IAW) the test methods in 4.5. Limiting values3.3 . The following applies to all specified limits in this specification: For purposes of determining conformance with these requirements, an observed value or a calculated value shall be rounded off “to the nearest unit“ in the last ri
23、ght-hand digit used in expressing the specification limit according to the rounding-off method of ASTM Practice E29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications. Filled containers3.3.1 . Cylindersa. The odor test is omitted. . Gaseous NF3
24、cylinders shall be prepared in accordance with procedures for oxygen in MIL-STD-1411 with the following exceptions: b. The cylinder and tube valve outlets shall be according to Compressed Gas Association Valve Outlet 330. The main manifold valve on the tube bank trailers shall be Circle Seal Valve P
25、/N MV 3308P/MV 3308P-P unless otherwise specified 3.3.2 Filling pressure3.3.3 . The container filling pressure shall not differ from that required by the contract by more than 1.0% at 70F when tested as specified in 4.2.1.1. In no case shall the filling pressure exceed the rated service pressure of
26、the container. Leakage3.3.4 . Containers should not leak when tested IAW 4.2.1.2. Identification tag. Unless otherwise specified in the contract or purchase order, an identification tag impervious to climatic conditions shall be wired to the outlet port of each container and shall contain the follow
27、ing information: Product name, NSN, quantity, name of manufacturer, name of contractor (if different from manufacturer), date of manufacture, and lot identification number. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87896A 3 TABLE I. Che
28、mical composition and physical properties. Composition Limit Test Paragraph Purity, Nitrogen trifluoride (NF3), % Vol (min) 99.0 4.5.1 Tetrafluoromethane (CF4), % Vol (max) 0.5 4.5.2 Carbon Dioxide (CO2), % Vol (max) 0.1. 4.5.2 Nitrous Oxide (N2O), % Vol (max) 0.1 4.5.2 Sulfur Hexafluoride (SF6), %
29、Vol (max) 0.1 4.5.2 Oxygen (O2) + Argon (Ar), % Vol (max) 0.1 4.5.3 Nitrogen (N2), % Vol (max) 0.1 4.5.3 Carbon Monoxide (CO), % Vol (max) 0.1 4.5.3 Total Reactive Fluoride (as HF), % Vol (max) 0.1 4.5.4 Water (H2O), ppmv (max) 5 4.5.5 4. VERIFICATION 4.1 Classification of inspections4.2 . The inspe
30、ctions shall be classified as conformance inspections. Conformance inspectiona. Individual tests 4.2.1 . Quality conformance tests shall consist of the following: b. Sampling tests 4.2.2 4.2.1 Individual tests4.2.1.1 . Each container shall be subjected to the following tests: Filling pressure4.2.1.2
31、 . The container shall be tested for proper filling pressure by using an ASME B40.1 type pressure gauge with a minimum of a 2A accuracy grade; calibration must be NIST traceable. Leakage4.2.2 . Each container shall be tested for leaks at the neck threads, stem packing, and pressure relief device of
32、the valve with leak detection fluid. Valve seat leakage shall be tested by means of a tube from the valve outlet to a container of liquid. Sampling for tests. When more than one container (cylinders or tubes) is filled from the same lot, the number of containers selected for sampling from that lot s
33、hall be IAW Table II. The first and last containers to be filled within a given lot shall be sampled. Other samples may be selected at random. The propellant from each container sampled shall constitute a separate sample. Provided by IHSNot for ResaleNo reproduction or networking permitted without l
34、icense from IHS-,-,-MIL-PRF-87896A 4 TABLE II. Sampling for tests. Number of containers in lot Number of containers to be sampled 1 1 2 - 40 2 41 - 70 3 70 and over 4 4.3 Sampling plan4.3.1 . Lota. The propellant produced in not more than 24 consecutive hours from a continuous process which is used
35、to fill shipping containers directly from the process output. A continuous process shall be the production of product by continuous input of raw materials and output of finished product by one manufacturer in one plant with no change in manufacturing conditions or materials . A lot shall consist of
36、one of the following: b. The propellant from individual runs of a batch process which is used to fill shipping containers directly from the process output. A batch process shall be the production of product by runs from single additions of raw materials which are reacted and purified forming the pro
37、duct. c. The propellant from either or both the continuous and batch processes which is held in a single storage tank and subsequently withdrawn to fill shipping containers. The product shall be homogenous at the time of withdrawal and shall not be added to while being withdrawn. After each addition
38、 to the storage tank, the contents shall constitute a separate lot. 4.3.1.1 Sample size4.3.1.2 . Each sample shall be of sufficient size to conduct all the quality conformance tests as specified herein. Sampling method4.4 . Unless otherwise specified, the propellant shall be sampled IAW ASTM F307. A
39、ll apparatus used shall be made of suitable materials. Each sample obtained shall be representative of the propellant as a whole. Rejection4.5 . When any sample of the propellant tested in accordance with 4.5 fails to conform to the requirements specified herein, the entire lot represented by the sa
40、mple shall be rejected. Test methods. The contractors own test methods may be used if approved by the procuring activity. In case of a dispute, the following shall be the referee methods. 4.5.1 Purity. Calculate the nitrogen trifluoride (NF3) purity as follows: NF3%Vol = 100 - %i where, %i = The sum
41、 of the impurities found in 4.5.2 through 4.5.5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87896A 5 4.5.2 Tetrafluoromethane, carbon dioxide, nitrous oxide, and sulfur hexafluoride4.5.2.1 Instrument Parameters. The analyst may vary the
42、column dimensions, carrier gas flow rate, and temperatures to optimize the analysis. . Tetrafluoromethane (CF4), carbon dioxide (CO2), nitrous oxide (N2O) and sulfur hexafluoride (SF6) in the propellant shall be determined by gas chromatography. Detector: Thermal conductivity detector, discharge ion
43、ization detector, or a pulsed discharged helium ionization detector. Column: Packing: Super Q, 80/100 (or equivalent) Length: 4.9 m (16 ft) ID: 1.75 mm (1/16 in.) OD: 3.2 mm (1/8 in.) Column material: stainless steel Carrier Gas / Flow Rate: Helium (MIL-PRF-27407) / 19 mL/min Temperatures: Detector:
44、 100C Oven: 42C Gas sampling valve: 42C 4.5.2.2 Calibration. Prepare a gaseous standard of helium containing at least 0.1% NF3and the components being analyzed in a concentration between one tenth and 10 times the specification limit or of the predicted measurement in the propellant sample. Analysis
45、 of the calibration standard must show a clear separation of each specified component from all other components and from NF3. 4.5.2.3 Procedure. Inject the calibration standard into the column using a gas-sampling valve. Record the retention times and peak areas for each component. The order of elut
46、ion is tetrafluoromethane, nitrogen trifluoride, carbon dioxide, nitrous oxide, and sulfur hexafluoride. Inject the propellant sample to be tested into the column in the same manner as the calibration standard. Record the retention times and the peak areas. Repeat two times. 4.5.2.4 Calculation. Com
47、pare the average peak area of the calibration standard to that of the nitrogen trifluoride sample being tested. Calculate the concentration of each component using the formula below: ( ) = 4.5.3 Oxygen + argon, nitrogen, and carbon monoxide. The concentration of oxygen+argon (O2+Ar), nitrogen (N2),
48、and carbon monoxide (CO) in the propellant shall be determined by gas chromatography. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87896A 6 4.5.3.1 Instrument parameters. The analyst may vary the column dimensions, carrier gas flow rate, and temperatures to optimize the analysis. Detector: Thermal conductivity detector, discharge ionization detector, or a pulsed disc
