1、flIL-0-23678B 16 7777706 0372683 5 5-09-03 MIL-0-23678B 10 September 1982 SUPERSEDING 29 September 1966 MIL-0-23678A MILITARY SPECIFICATION OXYGEN SYSTEMS, PORTABLE, HIGH PRESSURE, AIRCRAFT and Agencies of the Department of Defense. This specification is approved for use by all Departments 1. SCOPE
2、1.1 Scope. This specification covers requirements for aircraft high pressure portable oxygen systems, 1800 psi. 1.2 Classification. Portable oxygen systems shall be of the following types, as specified (see 6.2.lb): Type I - For 295 CU. in. cylinder. Type II - For 96 CU. in. cylinder. 2. APPLICABLE
3、DOCUMENTS 2.1 Government documents 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation, form a part of th
4、is specification to the extent spec if i ed here in. SPECIFICATIONS FEDERAL WW-T-775 - Tube, Copper, Seamless (For Refrigeration and General P PP-B -6 O1 - Boxes, Wood, Cleated - Plywood PPP-B-621 - Box, Wood, Nailed and Lock Corner PPP-B-636 - Boxes, Shipping, Fiberboard PPP-B-640 - Boxes, Fiberboa
5、rd, Corrugated, Triple Wal 1 Use). Beneficial comments (recommendtions, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Engineering Specifications and Standards Department (Code 93) , Naval Air Engineering Center, Lakehurst, NJ 0873
6、3, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appeari ng at the end of this document or by letter. FSC 1660 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-O-2367BB Lb W 9999906 0392682 7 W MI L -0-
7、2 36 78B MILITARY MIL-P-116 - MIL-C-5501 - MIL-B-22191 - MIL-L-25567 - MIL-P-26514 - MIL-0-27210 - MIL-T-27730 - MI L-C-81302 - MIL-T-81533 - MIL-H-81581 - STANDARDS MILITARY MIL-STD-105 - MIL-STD-129 - MIL-STD-130 - MIL-STD-143 - MIL-STD-889 - MS22059 - MS22061 - Preservation, Methods of . Caps and
8、 Plugs, Protective, Dust and Moisture Seal, Barrier Materials, Transparent, Flexible, Heat Sealable. Leak Detection Compound, Oxygen Systems. Polyurethane Foam, Rigid or Flexible, for Packaging. Oxygen, Aviators Breathing, Liquid and Gas. Tape, Anti seize, Polytetraf 1 uoroethylene, with Dispenser.
9、C1 eani ng Compound, Sol vent, Tri chl orotri f 1 uoroethane. 1,1,1 Trichloroethane (Methyl Chloroform) , Inhibited, Vapor Degreasi ng . Hose Assembl ies, Breathing Oxygen and Air, General Specification for. General Specification for. Sampling Procedures and Tables for Inspection Marking for Shipmen
10、t and Storage. Identification Marking of U.S. Military Property. Standards and Specifications, Order of Precedence for the Selection of. Dissimilar Metal s. Oxygen System, Portable, 295 Cu. In., High Pressure, Aircraft. Oxygen System, Portable, 96 Cu. In., High Pressure, Aircraft. by Attributes. AIR
11、 FORCE - NAVY AERONAUTICAL AN780 - Nipple, Union. AN800 - Cone, Union. AN805 - Nut, Union. (Copies of specifications, standards, drawings and pub1 ications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by t
12、he contracting officer. ) 2.1.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 First Article. When specified (see 6.2.lc), a portable oxygen system shall
13、 be subjected to first article inspection and approval (see 4.3 and 6.3). 3.2 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with MIL-STD-143. Provided by IHSNot for ResaleNo reproduc
14、tion or networking permitted without license from IHS-,-,-MIL-0-6!3678B Lb 9777706 0372683 7 m MIL-0-236786 3.3 Materials. Materials shall conform to applicable specifications and shall be as specified herein and on applicable drawings. not covered by applicable specifications or which are not speci
15、fically described herein shall be of the best quality, of the lightest practicable weight and suitable for the purpose intended. Materials which are 3.3.1 Metal arts. All metal parts shall be of a corrosion-resistant material _eh. or treate in a manner to render them adequately resistant to cor ros
16、i on . 3.3.1.1 Dissimilar metals. Dissimilar metals, such as defined by MIL-STD-889, shall not be used in intimate contact with each other unless suitably protected against electrolytic corrosion with protective coatings. 3.3.2 Nonmetallic materials. Any nonmetallic material that is adversely affect
17、ed by continued use with oxygen shall not be used. 3.3.3 Protective treatment. When materials are used in the construction of the system that are subject to deterioration when exposed to environmental conditions 1 ikely to occur during service usage, they shall be protected against such deterioratio
18、n in a manner that will in no way prevent compliance with the performance requirements of this specification. which might crack, chip or scale during normal service life or under extremes of environmental conditions shall not be used. Protective coating 3.4 Design and construction. The design and co
19、nstruction of the systems shall be in accordance with MS22059 or MS22061, as specified (see 6.2.lb). 3.4.1 fittings. Antiseize tape shall conform to and shall be applied as specified in MIL-T-27730. threads, coupling sleeves or on the outer side of tube flares. tape shall be allowed to enter the ins
20、ide of a fitting. Antiseize tape. Antiseize tape shall be used on all male pipe thread Tape shall not be used on flare tube fittings, straight None of the 3.4.2 De reasin . Prior to assembling, all internal surfaces of the system shall be a9-e egreased by flushing with a cleaning compound conforming
21、 to MIL-C-81302 or by using a vapor phase degreaser in accordance with MIL-T-81533. Components shall be cleaned by immersing, scrubbing or pressure spraying with MIL-C-81302 cleaning compound or ultrasonics may be used in conjunction with vapor degreasing or MIL-C-81302 cleaning compound. completion
22、 of the cleaning and when assembled, a General Electric Type H leak - detector or equivalent halide testing apparatus shall be used to determine the absence of the cleaning compound. After 3.4.3 Line assembly. Tubing used in the line assembly shall conform to WW-T-775. and AN805. Fittings used in th
23、e line assembly shall conform to AN780, AN800 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-0-23678B 3.5 Performance. 3.5.1 Leaka e. The system, when tested as specified in 4.6.2, shall not show any -9- evi ence of bubbles within two minutes
24、after maximum operating pressure is obtained nor shall there be any change in pressure after the storage period. 3.5.2 Odor. The hose, when tested as specified in 4.6.3, shall not emit oxygen ha- any odor. 3.6 Cylinder charge requirement. The cylinder shall be kept charged to a maximum of 20 pounds
25、per square inch gage (psig) with oxygen conforming to MIL-0-27210, type I. The cylinder valve shall be closed to retain the oxygen in the cylinder. 3.7 Interchangeability. All parts having the same manufacturers part number shall be functionally and dimensionally interchangeable. 3.8 Identification
26、of product. The systems shall be marked for identification in accordance with MIL-STD-130, excerit that the national stock number shall be omitted from the nameplate. 3.9 Workmanship. The systems shall be uniform in quality and shall be free from irregularities, defects or foreign matter which could
27、 adversely affect safety, performance, reliability or durability. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is rewonsible for the Performance of all inspection requirements as specified herein. Except as otherwise sp
28、ecified in the contract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where
29、 such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Classification of inspections. The inspection requirements of the oxygen systems shall be classified as follows: a. First article inspection. First article inspection consists of examinatio
30、ns and tests performed on samples which are representat ive of the production item after award of a contract to determine that the production item meets the requirements of this specification (see 4.3). b. Quality conformance inspection. Quality conformance inspection consists of examinations and te
31、sts Derfonned on individual riroducts or lots to determine conformance of the products or lots with the requirements set forth in this specification (see 4.4). 4.3 First article inspection. First article inspection shall consist of all the tests and examinations of this specification. 4 Provided by
32、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-0-23678B Lb m 7797906 0392685 2 m MIL-0-236786 4.3.1 First article samples. Unless otherwise specified, as soon as practicable after the award of a contract or order, the manufacturer shall submit two systems o
33、f each type specified in the contract or order. The samples shall be representative of the construction, workmanship, components and materials to be used during the production. When a manufacturer is in continuous production of these systems from contract to contract, submission of further first art
34、icle samples may be waived at the discretion of the acquiring activity (see 6.2.1). Approval of the first article samples or the waiving of the first article inspection does not exclude the requirements of submitting to the quality conformance inspection. The first article samples shall be furnished
35、 to the Government as directed by the contracting officer (see 6.2.1). 4.3.1.1 First article information. Upon completion of the first article inspection, all the applicable inspection reDorts and. when aDDlicable. recommendations and comments pertinent for use i n moni tori ng pboducti on wi 11 be
36、forwarded to the cognizant Government activity. One approved system will be returned to the manufacturer for use in monitoring production. The other sample may be consumed or destroyed in the first article inspection and shall not be considered as part of the quantity to be delivered under contract.
37、 4.4 Quality conformance inspection. The sampling and inspection levels shall conform to MIL-STD-105. consist of the following examinations and tests: The quality conformance inspection shall Vi sua1 examination Dimensions Leakage Odor Packagi ng 4.4.1 Sampl i ng . 4.4.1.1 Inspection lot. 4.4.1.1.1
38、Oxygen system. An inspection lot size shall be expressed in units of one oxygen system made under essentially the same conditions and from the same materials and components. The sample unit shall be oneoxygen system. 4.4.1.1.2 Packaging_. An inspection lot size shall be expressed in units of one ful
39、ly prepared shipping container, containing oxygen systems of one type, fully prepared for delivery from essentially the same materials and components. oxygen systems of one type, fully prepared for delivery with the exception that it need not be sealed. The sample unit shall be one shipping containe
40、r, contai ni ng 4.4.1.2 Sampling for tests and examinations of the oxygen systems. sample size, acceptance criteria, tests and examinations required for the oxygen systems-shall be as specified in table I. The 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
41、m IHS-,-,-MIL-0-236788 Lb 7777906 OL72bBb 4 D MIL -0-23678B 4.5 Test conditions. 4.5.1 Gas. Unless otherwise specified, the gas used in testing the oxygen system shm be oxygen conforming to MIL-0-27210, type I, 4.5.2 Temperature and pressure. Unless otherwise specified, tests shall be conducted at l
42、ocal ambient temperature and barometric pressure. The temeera- ture and barometric pressure shall be recorded at the time of inspectionand, when required, the test results shall be corrected to normal temperature and pressure (NTP) conditions. NTP conditions are 29.92 inches of mercury (101.3kPa) an
43、d 70oF (21OC). Test instruments shall be calibrated or adjusted according to their required usage in conducting individual tests. 4.6 Inspection methods. 4.6.1 Visual examination. 4.6.1.1 Ox en s stem. Every oxygen system shall be examined visually for critical de +- ects to etermine conformance to
44、this specification. Each oxygen system, selected as a sample unit from the lot, shall be examined visually for minor defects to determine conformance to this specification. The classifi- cation of defects, table II, shall be used to classify the defects found. 4.6.1 . 1.1 The oxygen system shall be
45、checked dimensionally to determine conformance to the dimensions specified in MS22059 or MS22061, as appl icable. Dimensions. 4.6.1.2 Packaging. Each of the fully prepared shipping containers, containing oxygen systems of one type, selected as a sample unit from the lot, shall be examined to determi
46、ne t,hat the packaging, packing and marking conform to this specification. The list of defects, table III, shall be used to enumerate the defects found. 4.6.2 Leaka e. The cylinder shall be charged to maximum operating pressure and the cy Tia9- n er valve opened. The “on-offtt mechanism of the regul
47、ator shall be placed in the lofftt position for this test. Leak test compound conforming to MIL-L-25567 shall be applied to al 1 connections, except regulator outlet, and any areas of potential leaks, to check system leakage. this test procedure, the cylinder shall be allowed to reach room temperatu
48、re, the cylinder valve closed and the pressure gage shall be marked. The system shall then be stored for a 6 hour period. After this period, the reading on the pressure gage shall be noted. The system shall meet the performance requirements specified in 3.5.1. Upon completion of 4.6.3 Odor. The hose
49、 shall be subjected to the odor test specified in MIL-H-815End shall pass the requirements specified in 3.5.2. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-0-23678B Lb m 779770b 0372687 b m 0 a a MIL-0-23678B 5. PACKAGING . 5.1 6.2.ld). Preservation. Preservation shall be level A or C, as specified (see 5.1.1 Level A. Unless otherwise specified, each oxygen system shall be cleaned for oxygen
