1、INCH-POUNDMIL-DTL-19246E 05 February 2007 SUPERSEDING MIL-DTL-19246D 27 December 2000 DETAIL SPECIFICATION CONNECTOR, OXYGEN MASK HOSE, TYPE MC-3A This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers type MC-3A ox
2、ygen mask hose connector for connecting the oxygen mask hose to the oxygen regulator hose. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specif
3、ication or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they ar
4、e listed. 2.2 Government documents. Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 491000B120-3, Highway 547, Lakehurst, NJ 08733-5100 or emailed to thomas.omaranavy.mil. Since contact information can change, y
5、ou may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. Reactivated after 05 February 2007 and may be used for new and existing designs and acquisitions. AMSC N/A FSC 1660 Provided by IHSNot for ResaleNo reproduction or networking
6、 permitted without license from IHS-,-,-MIL-DTL-19246E 2 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 documents are those cited in the solicitation or contra
7、ct. DEPARTMENT OF DEFENSE SPECIFICATIONS MS22016 - Connector, Oxygen Mask Hose, Type MC-3A. (Inactive for New Design) MS22058 - Connector, Oxygen Hose to Regulator MIL-PRF-27210 - Oxygen, Aviators Breathing, Liquid and Gas DEPARTMENT OF DEFENSE STANDARDS MIL-STD-129 - Military Marking for Shipment a
8、nd Storage MIL-STD-130 - Identification Marking of U.S. Military Property MIL-STD-810 - Environmental Engineering Considerations and Laboratory Tests MIL-STD-889 - Dissimilar Metals (Copies of these documents and standards are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assis
9、t.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Bldg 4D, Philadelphia, PA 19111-5094.) 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 a
10、re those cited in the solicitation or contract. AMERICAN SOCIETY FOR QUALITY (ASQ) ASQ-Z1.4 - Procedures, Sampling and Tables for Inspection by Attributes. (DoD adopted) (Copies of the above document are available from the American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 5320
11、1-4606 or http:/www.asq.org.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-D1149 - Rubber Deterioration Surface Ozone Cracking in a Chamber. (DoD adopted) (Copies of the above document are available from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohock
12、en, PA 19428-2959 or http:/www.astm.org.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-19246E 3 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this documen
13、t takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. The connector furnished under this specification shall be a product that is authorized by the qualifying activity for li
14、sting on the applicable qualified products list before contract award (see 4.2 and 6.3). 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.3. 3.3 Materials. Materials shall be as specified herein and in MS22016 and MS22058. 3.3.
15、1 Nonmetallic materials. Nonmetallic materials, except for the poppet material as shown on MS22016, shall be of an ozone-resistant composition. 3.3.1.1 Age. Age of elastomer components shall be not greater than 12 months from the date of manufacture to the date of delivery to any Government service
16、or to any airframe or accessory manufacturer. 3.3.2 Metal Parts. All metal parts shall be of a corrosion resistant material or treated to render them resistant to corrosion. 3.3.2.1 Dissimilar metals. Unless protected against electrolytic corrosion, dissimilar metals, in accordance with MIL-STD-889,
17、 shall not be in intimate contact with each other. 3.3.3 Protective treatment. When materials used in the construction of the connector assembly are subject to deterioration when exposed to environmental conditions likely to occur during service usage, they shall be protected against such deteriorat
18、ion that shall in no way prevent compliance with the performance requirements (see 3.5) of this specification. Protective coatings which crack, chip, or scale during normal service life or under extremes of environmental conditions shall not be used. 3.4 Design and construction. The design and const
19、ruction of the connector assembly shall be in accordance with MS22016. 3.4.1 Connector assembly valves. Connector assembly valves shall make it possible for the user to breathe normally through the connector when the valve is inserted into a connector conforming to MS22058. When disconnected, the va
20、lve shall permit inhalation, but a noticeable Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-19246E 4 resistance shall be introduced to indicate that disconnection has occurred. A spring-loaded relief valve shall be located in the connector
21、body and adjusted to allow oxygen from the bailout cylinder to escape whenever the mask pressure exceeds a pressure equal to 12 inches of water greater than ambient pressure. The relief valve shall vent small flows before the mask pressure reaches 12 inches of water greater than ambient pressure. 3.
22、4.2 Bailout attachment. The side bailout attachment shall contain a check valve as shown on MS22016. 3.5 Performance. 3.5.1 Disconnection force. The connector shall disconnect between 12 and 20 pounds when tested as specified in 4.7.2. 3.5.2 Leakage (room temperature and extreme temperature). Leakag
23、e of the connector assembly shall be not greater than 0.01 liter per minute (Lpm) when tested as specified in 4.7.3, 4.7.9 and 4.7.10. 3.5.3 Relief valve setting. The connector shall meet the following requirements when tested as specified in 4.7.4: Flow (Lpm) Developed Pressure (inches of water) 2.
24、5 less than 12 12.0 between 11 and 15 50.0 between 12 and 18 3.5.4 Pressure drop through MC-3A connector. The pressure drop through the connector shall be not less than 4 inches nor greater than 6 inches of water when tested as specified in 4.7.5. 3.5.5 Pressure drop through MC-3A connector with MS2
25、2058 connector. The pressure drop through the connector assembly shall be not greater than the following values when tested as specified in 4.7.6: Flow (Lpm) Pressure Drop (inches of water) 135 1.50 90 0.66 70 0.40 50 0.20 30 0.07 Provided by IHSNot for ResaleNo reproduction or networking permitted
26、without license from IHS-,-,-MIL-DTL-19246E 5 3.5.6 Proof pressure. The connector shall not show any evidence of structural damage when tested as specified in 4.7.7. 3.5.7 Bailout flow. The connector shall permit a minimum flow of 9 Lpm when tested as specified in 4.7.8. 3.5.8 Endurance. The connect
27、or shall disconnect between 12 and 20 pounds when tested as specified in 4.7.11. 3.5.9 Drop test. The connector shall operate when tested as specified in 4.7.12. 3.5.10 Salt fog. The connector shall not show any evidence of corrosion when tested as specified in 4.7.13. 3.5.11 Disassembly and examina
28、tion. The connector shall not show evidence of deterioration or wear when tested as specified in 4.7.14. 3.5.12 Ozone-resistance. The elastomer components shall not bloom or show any evidence of checking, cracking, or other damage when tested as specified in 4.7.15. 3.6 Interchangeability. All parts
29、 having the same manufacturers part number shall be functionally and dimensionally interchangeable. 3.7 Weight. The weight of the complete connector shall be not greater than 0.20 pound. 3.8 Identification of product. The connectors shall be marked for identification in accordance with MIL-STD-130.
30、3.9 Marking. Nomenclature tags shall be inserted in each bag showing title, part number or other data as required by the procuring activity. In addition, interior and exterior containers shall be marked in accordance with MIL-STD-129. 3.9.1 Precautionary marking. The following precautionary marking
31、shall appear on each package: CAUTION: DO NOT ALLOW CONTAMINANTS OF ANY KIND TO BE USED ON OR ABOUT THE OXYGEN CONNECTORS. 3.10 Workmanship. The connectors shall be uniform in quality and shall be free from irregularities, defects, or foreign matter which could affect safety, performance, reliabilit
32、y, or durability. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-19246E 6 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.2). b. Fi
33、rst article inspection (see 4.3). c. Conformance inspection (see 4.4). 4.2 Qualification inspection. Qualification inspection shall consist of the following examinations and tests: Visual examination Dimensions Disconnection force Leakage (room temperature) Relief valve setting Pressure drop through
34、 MC-3A connector Pressure drop through MC-3A connector with MS22058 connector Proof pressure Bailout flow Drop test 4.3 First article inspection. First article inspection shall consist of the following examinations and tests: Visual examination Dimensions Disconnection force Leakage (room temperatur
35、e) Relief valve setting Pressure drop through MC-3A connector Pressure drop through MC-3A connector with MS22058 connector Proof pressure Bailout flow Drop test 4.3.1 First article samples. After the award of the contract or order, the manufacturer shall submit three connector assemblies. The sample
36、s shall be representative of the construction, workmanship, components, and materials to be used during production. When a contractor is in continuous production of these connector assemblies from contract to contract, submission of Provided by IHSNot for ResaleNo reproduction or networking permitte
37、d without license from IHS-,-,-MIL-DTL-19246E 7 further first article samples on the new contract may be waived at the discretion of the procuring activity (see 6.4.1). Approval of the first article samples or the waiving of the first article inspection does not preclude the requirement of submittin
38、g to the conformance inspection. The first article inspection samples shall be furnished to the Government as directed by the contracting officer (see 6.4.1). 4.4 Conformance inspection. Conformance inspection shall consist of the following examinations and tests: Visual examination Dimensions Disco
39、nnection force Leakage (room temperature) Relief valve setting Pressure drop through MC-3A connector Pressure drop through MC-3A connector with MS22058 connector Bailout flow 4.5 Inspection lot. An inspection lot size shall be expressed in units of one connector made under essentially the same condi
40、tions and from the same materials and components. The sample unit shall be one connector. 4.5.1 Sampling for tests and examinations of connector assemblies. The sample size, acceptance criteria, tests, and examinations required for the connector assemblies shall be as specified in table I. TABLE I.
41、Sample size, test and examinations. TYPE OF TEST INSPECTION INSPECTION METHOD SAMPLE SIZE 1/ Every connector assembly Critical Visual Examination (See table II, Classification of defects) Minor 4.7 Inspection Level II Dimensions Major 4.7.1 Inspection Level S-2 Disconnection force Critical 4.7.2 Eve
42、ry connector assembly Leakage (room temperature) Critical 4.7.3 Every connector assembly Relief valve setting Critical 4.7.4 Every connector assembly Pressure drop through connector Critical 4.7.5 Every connector assembly Pressure drop Major 4.7.6 Inspection, Level S-2 MC-3A connector with MS22058 c
43、onnector Bailout flow Major 4.7.8 Inspection Level S-2 1/ The sample size shall be based only on the applicable sample size code letter corresponding to the specified inspection level of ASQ-Z1.4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D
44、TL-19246E 8 4.6 Gas conditions. The gas used in testing the connector assemblies shall be oxygen conforming to MIL-PRF-27210, type I. 4.6.1 Temperature and pressure conditions. Unless otherwise specified, inspections shall be conducted at local ambient temperatures and barometric pressure. Correctio
45、ns shall be made to provide agreement with the temperature and pressure calibration of the instruments. Inspection data provided by any instrument not calibrated to normal temperature and pressure (NTP) conditions shall be corrected to determine NTP requirements. NTP conditions shall be 29.92 inches
46、 of mercury and 70 F. 4.7. Visual examination. Every connector shall be examined visually for critical defects to determine conformance to this specification and to MS22016. Table II shall be used to classify the defects found. TABLE II. Classification of defects.CRITICAL MINOR 1. Material imperfect
47、ions - foreign matter embedded. 201. Marking - missing, insufficient, incorrect, 2. Surface - unclean, rough, misaligned, or illegible, or not permanent. containing cracks, nicks, or other flaws. 3. Any component missing, malformed, fractured, or otherwise damaged. 4. Any component loose or otherwis
48、e not securely retained. 5. Incorrect assembling or improper positioning of components. 6. Any functioning part that works with difficulty. 7. Faulty workmanship or other irregularities. 4.7.1 Dimensions. The connector shall be checked dimensionally to determine conformance to MS22016. 4.7.2 Disconn
49、ection force. The connector shall be installed in a connector assembly conforming to MS22058. The connector assembly shall then be subjected to a straight pull parallel to the longitudinal axis. An average of five pulls conducted at five second intervals shall Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
