1、AMSC N/A FSC 4720 INCH-POUND MIL-PRF-87961B 13 December 2013 SUPERSEDING MIL-PRF-87961A 08 September 1998 PERFORMANCE SPECIFICATION HOSE AND HOSE ASSEMBLIES, AIR DUCT, AIR BREATHING, OXYGEN SYSTEM This specification is approved for use by all Departments and Agencies of the Department of Defense. 1.
2、 SCOPE 1.1 Scope. This specification covers the requirements for hose and hose assemblies (see 6.9) which supply breathing oxygen to aircrews during the operation of high performance aircraft. 1.2 Classification. Hoses and hose assemblies covered by this specification are of the following types with
3、 lengths as identified in figures 1, 4, and 5 (see 6.2 and 6.10). Type I Hose with end covers and outer covering Type II Type I hose with MS22058-1 connector and NAS397-18 clamp Type III Type I hose with MS22058-2 connector, NAS397-18 clamp and retainer strap, P/N 7225317-10 2. APPLICABLE DOCUMENTS
4、2.1 General. The documents listed in this section 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
5、 completeness of this list, document users are cautioned that they must meet all specified requirements of the documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. Comments, suggestions, or questions on this document should be addressed to Oklahoma City Air L
6、ogistics Center/ENSDAA, 3001 Staff Drive, Suite 1AB81A, Tinker AFB, OK 73145 or emailed to af71tinker.af.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST database at https:/assist.dla.mil. Provided by IHSNot for ResaleNo repr
7、oduction or networking permitted without license from IHS-,-,-MIL-PRF-87961B 2 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documen
8、ts are those cited in the solicitation or contract. FEDERAL SPECIFICATIONS A-A-59155 - Nitrogen, High Purity, Special Purpose A-A-59503 - Nitrogen, Technical FEDERAL STANDARDS FED-STD-191 - Textile Test Methods FED-STD-595/34410 - Green, Flat or Lusterless DEPARTMENT OF DEFENSE SPECIFICATIONS MS2205
9、8 - Connector, Oxygen Hose to Regulator (Copies of these documents are available online at https:/assist.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other government documents, drawings, and publications. The followin
10、g other government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation or contract. DRAWINGS, AIR FORCE 7225317 - Retainer Strap Assembly Hose, Connector to Regulator (Copies of
11、the drawing are available from the procuring activity or OC-ALC/ENSDAA Public Sales Desk, Tinker AFB, OK 73145.) 2.3 Non-government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those c
12、ited in the solicitation or contract. AEROSPACE INDUSTRIES ASSOCIATION of AMERICA, INC. (AIA) NAS397 - Clamp - Ratchet, One Piece (NA/NAS documents may be obtained online at www.aia-aerospace.org/ or from Aerospace Industries Association 1000 Wilson Boulevard, Suite 1700 Arlington, VA 22209-3928.) P
13、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87961B 3 AMERICAN SOCIETY FOR QUALITY (ASQ) ASQC-Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (DoD Adopted) (ASQ documents may be obtained online at http:/www.asq.org/ or fr
14、om American Society for Quality, P.O. Box 3005, Milwaukee, WI 53201-3005 or 600 North Plankinton Avenue, Milwaukee, WI 53203.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-D1149 - Rubber Deterioration-Surface Ozone Cracking in a Chamber (DoD Adopted) (ASTM documents may be obtained online
15、at http:/www.astm.org/ or from American Society for Testing and Materials, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.) PARACHUTE INDUSTRY ASSOCIATION (PIA) PIA-C-419 - Cloth, Duck, Cotton, Unbleached, Plied-Yarns Army and Numbered (PIA documents may be obtained online at
16、 http:/ or from PIA 3833 West Oakton Street Skokie, IL 60076.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE-AS1065 - Quality & Serviceability Requirements for Aircraft Cylinder Assemblies Charged with Aviators Breathing Oxygen SAE-AS1933 - Hose Containing Age-Sensitive Elastomeric Material, Age Control
17、s for SAE AS8010 - Aviators Breathing Oxygen Purity Standard (SAE documents may be obtained online at http:/www.sae.org/ or from SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001 USA.) 2.4 Order of precedence. Unless otherwise noted herein or in the event of a conflict betwee
18、n the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS Provided by IHSNot for ResaleNo reproduction or networ
19、king permitted without license from IHS-,-,-MIL-PRF-87961B 4 3.1 First article. When specified (see 6.2), the hose or hose assembly, shall be subjected to first article inspection in accordance with 4.2. 3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or enviro
20、nmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Materials. All materials shall be suitably treated to resist corrosion
21、due to electrolytic decomposition and any other atmospheric condition that may be encountered during operational use and storage (see 6.3). The use of toxic chemicals, hazardous substances, or ozone depleting chemicals shall be avoided, whenever feasible. 3.3.1 Safety specific materials. All materia
22、ls used shall be capable of operating in a pure oxygen environment without creating a health or fire hazard (see 6.9). Cadmium shall not be used. 3.3.2 Ozone resistance. Elastomer components and end covers shall be composed of ozone resistant materials (see 6.3). 3.4 Interface. 3.4.1 Color. The hose
23、 outer covering shall be lusterless green, color 34410 of FED-STD-595. Unless otherwise specified in the acquisition document (see 6.2). The end cover shall be lusterless green, color 34410 of FED-STD-595. 3.4.2 Fittings. The hose and end covers shall be compatible with MS22058 connectors and NAS397
24、 clamps. 3.4.3 Dimensions. The hose shall conform to the dimensions shown figure 1 3, 4, or 5. 3.5 Performance. 3.5.1 Components. 3.5.1.1 Hose reinforcement. The hose shall be reinforced (see 6.4 and figure 2). 3.5.1.2 End cover. The ends of the hose shall be provided with an end cover (see figures1
25、 through 3). 3.5.1.3 Outer covering. The hose shall be provided with an outer covering (see 6.9). 3.5.2 Odor. The hose shall be odorless. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87961B 5 3.5.3 Cleanliness. All surfaces shall be free o
26、f visible particulates (50 microns and larger), free of visible fluorinated lubricants, and free of hydrocarbon contamination to a level not greater than 3 milligrams per square foot (mg/ft2) (see 6.5). 3.5.4 Flexibility. The hose shall withstand being coiled around a 1.75 inch diameter rod, and the
27、n twisted 360oor 720ofor hoses under or over 30 inches in length, respectively, in each direction about the longitudinal axis. 3.5.5 Delamination. Under a vacuum, the inner layer of the hose shall not delaminate. 3.5.6 Elongation. When suspended in the vertical position with a load, the hose elongat
28、ion shall be between 3% and 10% of the original length. Any permanent set (see 6.9) shall not exceed 5% of the original length. 3.5.7 Leakage. The hose shall not leak in excess of 0.25 cm3per minute per foot of hose, when pressurized to 10 psi gage (psig). 3.5.8 Tensile load. The hose assembly shall
29、 withstand a 40 pound tensile load. 3.5.9 Static load. Under a static load of 125 pounds per 4 inch section, the outside diameter shall not be decreased more than 15% of the original value. After removal of the static load, the outside diameter of the hose shall be within 5% of the original outside
30、diameter. 3.5.10 High temperature. The hose shall withstand exposure to 160o+5oF for 48 hours. 3.5.11 Low temperature. The hose shall withstand exposure to -40o+5oF for 30 minutes. 3.5.12 Abrasion. The hose shall withstand abrasion simulating usage (see 6.6). 3.5.13 Flexibility endurance. The hose s
31、hall withstand 500 cycles of being coiled and released around a rod, 1.75 inch diameter, and then 500 cycles of being twisted 270oabout the longitudinal axis in both directions. 3.5.14 Burst pressure. The burst pressure of the hose shall exceed 20 psi (see 6.9). 3.5.15 Age. The hose shall be no more
32、 than 12 months old from the cure date to the acceptance date, as defined in SAE-AS1933. 3.5.16 Weight. The hose shall not exceed 5.0 ounces per foot of length. 3.5.17 Identification. The hose shall be permanently and legibly marked with the following data (see 6.2): a. Nomenclature b. Cure date. c.
33、 PIN. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87961B 6 d. Manufacturers CAGE code. e. Manufacturers part number. 3.6 Interchangeability. All parts having the same manufacturers part number shall be functionally and dimensionally inter
34、changeable. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article (see 4.2). b. Conformance inspection (see 4.3). 4.2 First article inspection. First inspection shall be performed on 3 hoses and shall consist of al
35、l tests in section 4.6. 4.3 Conformance inspection. Conformance inspection shall consist of the individual tests in 4.3.1 and the sampling tests in 4.3.2. 4.3.1 Individual tests. Each hose shall be subjected to the following tests: a. Examination (see 4.6.1) b. Delamination (see 4.6.5) c. Leakage (s
36、ee 4.6.7) 4.3.2 Sampling tests. Sampling tests shall be performed in accordance with the guidance in ASQC-Z1.4. Sampling shall begin at the normal inspection level (see 6.7). The sampling tests are: a. Odor (see 4.6.2) b. Cleanliness (see 4.6.3) c. Flexibility (see 4.6.4) d. Elongation (see 4.6.6) 4
37、.4 Test conditions. Unless otherwise specified in the individual test description, all tests shall be performed under the following test conditions: a. Ambient atmospheric conditions. b. First article tests shall be performed using oxygen conforming to Type I of SAE-AS8010. Individual tests shall be
38、 performed using oxygen conforming to Type I of SAE-AS8010 or water pumped nitrogen conforming to Type I, Class 1, Grade B of A-A-59503 and A-A-59155. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87961B 7 4.5 Requirements cross-reference m
39、atrix. Table I provides a cross-reference matrix of the section 3 requirements tested or verified in the paragraphs below. TABLE I. Requirements cross-reference matrix Requirement Verification Requirement Verification 3.1 4.2 3.5.6 4.6.6 3.3 4.6.1 3.5.7 4.6.7 3.3.1 4.6.1, 4.6.2, 4.6.3 3.5.8 4.6.8 3.
40、3.2 4.6.16 3.5.9 4.6.9 3.4.1 4.6.1 3.5.10 4.6.10 3.4.2 4.6.1 3.5.11 4.6.11 3.4.3 4.6.1 3.5.12 4.6.12 3.5.1.1 4.6.6, 4.6.8, 4.6.9 3.5.13 4.6.13 3.5.1.2 4.6.1 3.5.14 4.6.14 3.5.1.3 4.6.1 3.5.15 4.6.15 3.5.2 4.6.2 3.5.16 4.6.1 3.5.3 4.6.3 3.5.17 4.6.1 3.5.4 4.6.4 3.6 4.6.1 3.5.5 4.6.5 4.6 Tests. 4.6.1
41、Examination. The hose shall be examined to determine that the materials, interface, end cover, outer covering, weight, identification, and interchangeability conform to this specification. 4.6.2 Odor. Oxygen shall be flowed through the hose at 10 liters per minute for 2 minutes and then the hose sha
42、ll be tested for odor in accordance with SAE-AS1065. 4.6.3 Cleanliness. All surfaces shall be free of visible particulates (50 microns and larger), free of visible fluorinated lubricants, and free of hydrocarbon contamination to a level not greater than 3 mg/ft2(see 6.5). Cleanliness of the surfaces
43、 shall be demonstrated by industrially accepted methods and these cleaning and verification methods shall be identified (see 6.2 and 6.5). 4.6.4 Flexibility. The hose shall be coiled and uncoiled around a 1.75 inch diameter rod 4 times. After each coiling and uncoiling cycle, the hose shall be twist
44、ed 90o(in the same direction each time) about its longitudinal axis. After the 4 coiling cycles, one end of the hose shall be fixed, the other end shall be twisted 360oin each direction 5 times. The test shall then be repeated by twisting the opposite hose end. For hoses 30 inches or longer, the hos
45、e end shall be twisted 720oin each direction 5 time. The hose shall then be subjected to the delamination and leakage tests. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87961B 8 4.6.5 Delamination. With one end of the hose capped, a vacuu
46、m equivalent to 16 inches of mercury shall be applied to the hose for 10 minutes. After this period and while the vacuum is maintained, the inner layer of the hose shall show no evidence of delamination (see 6.8). 4.6.6 Elongation. The hose shall be suspended vertically by one end and a 10 pound loa
47、d shall be applied for 30 seconds. The hose elongation shall be between 3% and 10% of the original length. Two minutes after removal of the load, the hose shall have no permanent set in excess of 5% of the original length. 4.6.7 Leakage. The hose shall be pressurized to 10 psig for 1 minute and then
48、 the pressure shall be maintained at 5 psig for 5 minutes. During this time, the hose shall not leak in excess of 0.25 cm3per minute per foot of hose. 4.6.8 Tensile load. With a MS22058 connector attached to one end of the hose assembly with a NAS397 clamp, a tensile load 0f 40 pounds shall be appli
49、ed to the other end cover for 1 minute. The hose, end cover, or MS22058 connector shall not separate. 4.6.9 Static load. A static load of 125 pounds shall be applied for 30 seconds to a 4 inch section of the reinforced portion of the hose, and this load shall be normal to the longitudinal axis. With the load applied, the outside diameter shall not be reduced more than
