1、AEROSPACE STANDARDAS7413Issued 2001-12Reaffirmed 2011-06Coupling Assemblies, Quick Disconnect, Automatic Shutoff1. SCOPE:This specification establishes requirements for automatic shutoff, quick-disconnect coupling assemblies for fuel and oil lines.1.1 Classification:Quick-disconnect couplings shall
2、be of the following types and classes:Type I - Fuel Line CouplingClass A: -65 to +135 F fuel and +160 F ambientClass B: -65 to +200 F fuel and +350 F ambientClass C: -65 to +300 F fuel and +600 F ambientType II - Oil Line CouplingClass A - Petroleum Oil (J1966): -65 to +250 F oil and +160 F ambientC
3、lass B - Synthetic Oil (MIL-PRF-7808): -65 to +350 F oil and +350 F ambientClass C - Synthetic Oil (MIL-PRF-23699): -40 to +400 F oil and +400 F ambient2. REFERENCES:2.1 Applicable Documents:The following publications form a part of this document to the extent specified herein. The latest issue of S
4、AE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, howeve
5、r, supersedes applicable laws and regulations unless a specific exemption has been obtained.SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicabili
6、ty and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and sugges
7、tions. Copyright 2011 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A
8、 DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS7413SA
9、E AS7413 - 2 -2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 3216 Fluorocarbon (FKM) Rubber, Fuel and Oil Resistant, 70-80AMS 3331 Fluorosilicone (FVMQ) Rubber, Fuel and Oil Resistant, 65-75AMS-QQ-P-35 Passivation Treatments For Corrosion Resistant
10、SteelsAMS-QQ-C-320 Chromium Plating (Electrodeposited)ARP868 Pressure Drop Test for Fuel System ComponentsAS8879 Screw Threads UNJ Profile, InchAS1946 Hose Assembly, Polytetrafluorethylene (PTFE), up to 450 F (232 C) and 1500 psi (10500 kPa), Procurement SpecificationJ1966 Lubricating Oil, Aircraft
11、Piston Engine (Nondispersant Mineral Oil), Standard2.1.2 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.MIL-PRF-680 Degreasing SolventMIL-P-5315 Packing, Preformed, Hydrocarbon Fuel ResistantMIL-R-7362 Rub
12、ber, Synthetic, Solid, Sheet, Strip, and Fabricated Parts, Synthetic Oil ResistantMIL-PRF-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic BaseMIL-DTL-8795 Hose Assemblies, Elastomeric-Hydraulic Fluid, Fuel and Oil Resistant, General Specification forMIL-PRF-23699 Lubricating Oil, Aircraft T
13、urbine Engines, Synthetic BaseMIL-C-81706 Chemical Conversion Materials for Coating Aluminum and Aluminum AlloysMIL-STD-130 Identification Marking of U.S. Military PropertyMIL-STD-810 Environmental Engineering Considerations and Laboratory TestsMIL-STD-889 Dissimilar MetalsMS8000 Hose Assembly, Deta
14、chable Fittings, Tetrafluorethylene, High Temperature, Medium Pressure, Flare to FlareMS8001 Hose Assembly, Detachable Fittings, Tetrafluorethylene, High Temperature, Medium Pressure, Flareless to FlarelessMS28741 Hose Assembly, Detachable End Fitting, Medium Pressure2.2 Definitions:The following de
15、finitions are applicable to this specification.COUPLER HALF: The half that contains the locking device which holds the coupling halves together in the coupled position; generally connected to a hose assembly and is known as the hose attaching half, or female half.FIXED HALF: The half which, normally
16、, is rigidly mounted to a bulkhead, firewall, or tube assembly; also known as the bulkhead mounting half, nipple, or male half.SAE AS7413 - 3 -3. TECHNICAL REQUIREMENTS:3.1 First Article:The supplier shall provide sample coupling assemblies of each size being purchased to the purchaser, prior to sta
17、rting production. These samples shall demonstrate that the production methods and design choice will produce coupling assemblies that comply with the requirements specified herein. Approval of first article samples will not relieve the supplier of the obligation to furnish coupling assemblies confor
18、ming to the applicable provisions of this document. Any changes or deviations of the production coupling assemblies from the first article sample during production will be agreed upon by the supplier and the purchaser.3.2 Design and Construction:The complete quick-disconnect coupling assembly shall
19、consist of two separate coupling halves. A self-sealing shutoff device shall be incorporated in each coupling half, and the locking device for the coupling shall be included in the coupler half. The purchaser shall have the option of procuring the complete quick-disconnect coupling assembly or eithe
20、r of the separate coupling halves.3.2.1 Design: Coupling assemblies configurations shall not exceed the basic outline dimensions and weights shown on Figure 1 and Table 1. One coupling half shall be primarily designed for, but not limited to bulkhead or firewall mounting. A means for quick separatio
21、n of the coupling halves shall be incorporated with provisions for automatically sealing the contained fluid against flow during the disconnect cycle. When connected, the coupling assembly shall permit fluid flow in either direction in accordance with the rated flows and pressure drops specified in
22、Table 1 and at the rated pressures specified in Table 2. Flow shall not be blocked under surge conditions.3.2.1.1 Method of Connecting and Disconnecting Coupling Assembly: The coupling assembly shall be designed such that they can be manually connected or disconnected throughout the applicable tempe
23、rature range for the coupling type and class when subjected to the following line pressures:a. 60 pounds per square in (psi) for couplings applicable to 0.250 in through 1.000 in outside diameter (OD) tubingb. 20 psi for couplings applicable to 1.250 in through 2.000 in OD tubing except that these s
24、hall be capable of disconnection at 60 psi.3.2.1.2 Locking: Devices shall be provided for positively locking connected couplings and means incorporated for visually and physically verifying the locked condition.3.2.1.3 Overhaul: The couplings shall be designed to permit overhaul or repair without th
25、e use of special tools or fixtures.3.2.1.4 Interchangeability: All coupling halves having the same manufacturers part number shall be functionally and dimensionally interchangeable.SAE AS7413 - 4 -FIGURE 1 - Maximum Envelope DimensionsTABLE 1 - Maximum Envelope Dimensions, Weights, Spillage, Rated F
26、low, and Pressure DropsTABLE 2 - Pressure Rating Pressure - psiSAE AS7413 - 5 -3.2.1.5 Screw Threads: All threads shall be in accordance with AS8879.3.2.2 Construction: The coupling assembly shall be constructed to withstand the normal strains, jars, vibrations, and other such conditions incident to
27、 shipping, storage, installation, and service. Manual connection and disconnection of the coupling shall have no adverse effect on its leakage characteristics, irrespective of the alignment of mating assemblies.3.2.2.1 Materials: Coupling assembly materials used shall be uniform in quality, free fro
28、m defects, and shall conform to the applicable specifications and the requirements specified herein. 3.2.2.1.1 Metals: Metals shall be corrosion resistant or treated to resist corrosion due to fuels, oils, salt spray, atmospheric conditions, or wear encountered in transportation, storage, or during
29、normal service life.3.2.2.1.2 Dissimilar Metals: Dissimilar metals as defined in MIL-STD-889 shall not be used in intimate contact with each other unless suitably protected against electrolytic corrosion.3.2.2.2 Finishes:3.2.2.2.1 Aluminum Alloy: Aluminum alloy parts shall have a MIL-C-81706, Class
30、3 coating.3.2.2.2.2 Corrosion-Resistant Steel: Corrosion-resistant steel parts shall be passivated in accordance with AMS-QQ-P-35.3.2.2.2.3 Chromium Plating: Chromium plating shall conform to AMS-QQ-C-320, Class 2.3.2.2.3 Non-metallic Components: Non-metallic components shall be compatible with the
31、applicable fluids used in the fuel or oil system for types I and II couplings, respectively.3.2.2.3.1 Packings, O-rings, or Special Seals: Packings, O-rings, or special seals shall conform to MIL-P-5315, MIL-R-7362, AMS 3331, AMS 3216, or other compatible material.3.2.2.3.2 Lubrication: Lubricants t
32、hat are compatible with system fluids and temperatures may be used on threads and O-ring packings at assembly. Bonded dry film lubricants compatible with system fluids are permissible. Lubricants compatible with system fluids and fluid temperature ranges may be applied to external parts subject to w
33、ear during coupling connection and disconnection cycles.3.2.2.4 Protective Treatment: Materials that are used in the construction of the couplings which are subject to deterioration when exposed to climatic or environmental conditions likely to occur during storage or service usage shall be protecte
34、d against such deterioration in a manner that will in no way prevent compliance with the performance requirements of this specification. The use of any protective coating that will chip, crack, abrade, peel, or scale during service life or extreme environmental conditions shall be avoided.SAE AS7413
35、 - 6 -3.2.2.5 Material Restrictions: Surfaces of the coupling assembly that are normally in contact with fuel and synthetic oil shall not be of magnesium, copper, nor be cadmium plated.3.3 Performance:3.3.1 Examination of Product: Each coupling half shall conform to the requirements of this specific
36、ation with respect to design, workmanship, and identification.3.3.2 Functional Test: There shall be no binding, sticking or any other evidence of faulty operation after performing the test in 4.6.2.3.3.3 Fluid Loss:3.3.3.1 Sealing Under Pressure: The coupling halves shall, when uncoupled, seal the e
37、nds of the disconnected lines at the point of disconnection and shall not permit external leakage during any phase of the coupling or uncoupling. Fluid loss as specified in Table 1 is not considered as external leakage. Both halves of the coupling shall seal fluid with not more than a leakage trace
38、when tested in accordance with 4.6.3.1.3.3.3.2 Fluid Loss: The average fluid lost during five consecutive connect and disconnect cycles at the specified operating pressure shall not exceed the amounts shown in Table 1 when subjected to the test in 4.6.3.2.3.3.4 Pressure Tests:3.3.4.1 Proof Pressure:
39、 There shall be no visible signs of leakage after 2 min minimum of pressurization when subjected to the test in 4.6.4.1.3.3.4.2 Low Pressure: There shall be no visible signs of leakage after 2 min minimum of pressurization when subjected to the test in 4.6.4.2.3.3.4.3 Pressure Drop: The pressure dro
40、p through the connected couplings shall not exceed the values shown in Table 1 when tested in accordance with 4.6.4.3 using water as the test fluid. An additional test shall be conducted using the applicable fluid for the type and class of the coupling as the test fluid.3.3.4.4 Vacuum: There shall b
41、e no visible signs of leakage as indicated by a loss of vacuum in 5 min at the negative pressures, shown by the vacuum gage used, when subjected to the test in 4.6.4.4.3.3.4.5 Burst Pressure: There shall be no leakage when subjected to the test in 4.6.13.5. Distortion of the coupling above the burst
42、 pressure is not reason for rejection.3.3.5 Operation: After the couplings are manually connected and disconnected in the manner specified in 4.6.5, the coupling shall meet the requirements of 3.3.4.1 and 3.3.4.2.SAE AS7413 - 7 -3.3.6 Temperature Shock: When subjected to the test in 4.6.6, the coupl
43、ings shall withstand the thermal cycling effects of its environment and fluid temperature changes without deterioration in either performance or endurance. The coupling shall connect and disconnect manually as in normal service without any mechanical assistance and meet the requirements of 3.3.4.1 a
44、nd 3.3.4.2.3.3.7 Surge Flow: When subjected to the test in 4.6.7, there shall be no evidence of flow blocking or internal damage, and the disconnected halves shall meet the requirements of 3.3.4.1 and 3.3.4.2.3.3.8 Accelerated Corrosion: Any corrosion that affects the operation of the couplings or i
45、s detectable without special visual aids shall be cause for rejection when subjected to the test in 4.6.8.3.3.9 Salt Fog: Any corrosion that affects the operation of the couplings or is detectable without special visual aids shall be cause for rejection when subjected to the test in 4.6.9.3.3.10 Dus
46、t: It shall be possible to manually disconnect the couplings when subjected to the test in 4.6.10.3.3.11 Electrical Resistance: The resistance shall not exceed 1 ohm when subjected to the test in 4.6.11.3.3.12 Endurance: After completion of cyclic testing of 4.6.12, the couplings shall meet the requ
47、irements of 3.3.4.1 and 3.3.4.2. The coupling shall not exhibit any undue looseness due to wear from the vibration.3.3.13 Vibration: After performing the vibration test in 4.6.13, the couplings shall meet the requirements of 3.3.4.1 and 3.3.4.2. The couplings shall not exhibit any looseness due to w
48、ear from the vibration.3.3.14 Contaminated Fluid Endurance: After being subjected to the test in 4.6.14, it shall be possible to manually disconnect and connect the couplings and shall meet the requirements of 3.3.4.1 and 3.3.4.2.3.5 Identification of Product:Each coupling shall be marked for identi
49、fication in accordance with MIL-STD-130.3.5.1 Identification Information: The following information shall be included on a securely attached nameplate or etched, engraved, embossed, or stamped in a suitable location on a primary housing of each coupling half.Manufacturers name or trademark, or bothCoupler half or fixed half (optional)Manufacturers part number and serial number, if usedAS7413Type (I or II) Class (A, B or C)3.5.2 Connection and Disconnection Instructions: Connection and disconnection instructions shall appear on the coupling ha
