1、AEROSPACE STANDARD AS1709 REV. AIssued 1989-09 Revised 2001-09 Reaffirmed 2014-11 Superseding ARP1709 Coupling Assembly, Hydraulic Self Sealing, Quick Disconnect RATIONALE AS1709A has been reaffirmed to comply with the SAE five-year review policy. _ SAE Technical Standards Board Rules provide that:
2、“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 applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE r
3、eviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval
4、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 DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerSer
5、vicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS1709A 1. SCOPE:1.1 This specification covers the requirements for aircraft, hydraulic, self-sealing, quick disconnect couplings, fo
6、r use in Type II hydraulic systems (-65 to +275 F temperature range) as defined by AS5440.1.2 Classification:Hydraulic self-sealing, quick disconnect couplings shall be of the following classes and types:Class 1000: 1000 psigClass 3000: 3000 psigClass 4000: 4000 psigClass 5000: 5000 psigType I Quick
7、 Disconnects shall have a visual indication that they are completely connected and open to flow.Type II Quick Disconnects shall have both a visual and touch indication that they are completely connected and open to flow.2. APPLICABLE DOCUMENTS:2.1 Issues of Documents:The following documents of the i
8、ssue in effect on date of invitation for bids, or request for proposal, form a part of this specification to the extent specified herein:2.1.1 Military Specifications:MIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft and OrdnanceMIL-H-25579 Hose Assembly, Tetrafluoroethylene, High Temperature, Me
9、dium Pressure, General Requirements forMIL-PRF-83282 Hydraulic Fluid, Fire Resistant Synthetic Hydrocarbon Base, AircraftMIL-PRF-87257 Hydraulic Fluid, Fire Resistant, Low Temperature, Synthetic Hydrocarbon Base, Aircraft and Missile2.1.2 Military Standards:MIL-STD-129 Marking for Shipment and Stora
10、geMIL-STD-130 Identification Markings of U.S. Military PropertyMIL-STD-810 Environmental Test Methods2.2 Other Publications:Society of Automotive Engineers (SAE), Inc.AIR1047 A Guide for the Selection of Quick-Disconnect Couplings for Aerospace Fluid SystemsARP24 Hydraulic, Pressure Drop, Determinat
11、ion ofARP603 Hose, Hydraulic, Tubing and Fitting Assemblies, Impulse Testing ofAS614 Hose Assembly, Tetrafluoroethylene, Heavy Duty, High Temperature, High Pressure, 4000 psi (27 580 kPa) Hydraulic and PneumaticAS5440 Hydraulic Systems: Design, Installation and Test of Aircraft (General Specificatio
12、n for)AS8775 Hydraulic System Components, Aircraft and Missile, General Specification forAS8791 Retainer, Packing, Hydraulic and Pneumatic, Tetrafluoroethylene ResinAS1339 Hose Assembly, Tetrafluoroethylene, 400 F, 3000 psi Hydraulic, Lightweight3. REQUIREMENTS:3.1 Qualification:The couplings furnis
13、hed under this specification shall be a product that has been tested, has passed the qualification tests specified herein, and has been approved by the procuring agency or prime contractor.3.2 General Specification:The requirements of AS8775 apply to this specification except as specified herein.SAE
14、 INTERNATIONAL AS1709A Page 2 of 19_ 3.3 Materials:The coupling shall be constructed of materials that will not change the composition of, or be adversely affected by hydraulic fluid conforming to MIL-H-5606, MIL-PRF-83282, MIL-PRF-87257 or AS1241 Type IV. Materials, processes, and parts shall meet
15、the design requirements and intent of AS8775. Other materials and fluids can be utilized for similar applications based on procuring agency requirements.3.4 Design and Construction:The configuration, dimensions, and other design details of the couplings shall conform to applicable Specification Cont
16、rol Drawings. The design objective shall be to obtain the smallest size and lightest weight commensurate with meeting performance requirements herein. When coupled, the coupling shall be such that it will permit fluid flow in either direction in accordance with the rated flow and pressure drop as sp
17、ecified in Table I. Flow shall not be blocked under surge conditions.3.4.1 Temperature Range: Couplings shall be designed to operate throughout the temperature range of -65 to +275 F (see 4.6.3).3.4.2 Sealing and Fluid Loss: The couplings shall, when uncoupled, seal the ends of the disconnected line
18、s at the point of disconnection and shall not permit external leakage during any phase of coupling or uncoupling. Fluid loss (spillage) as specified in Table II is not considered to be external leakage. Both halves of the coupling shall seal fluid under both low and high pressures (see 4.6.4).3.4.3
19、Seals: The packing and retainer materials shall be compatible with the applicable fluid specified on the procurement specification; MIL-H-5606, MIL-PRF-83282, MIL-PRF-87257 or AS1241 Type IV. Packing and retainer material for other fluid shall be specified by the procuring agency. However, the suppl
20、ier shall demonstrate that the performance of the coupling is satisfactory with the packing retainer material used.SAE INTERNATIONAL AS1709A Page 3 of 19_ TABLE I - Rated Flow and Pressure DropTABLE II - Air Inclusion and Fluid LossSAE INTERNATIONAL AS1709A Page 4 of 19_ 3.4.4 Operation: The couplin
21、g shall be so designed that it can be coupled and uncoupled with a one handed, simple motion and without special tools while one-half is held in a fixed mounting. It shall be possible to couple and uncouple with a static pressure (as shown in Table III) applied to both halves and each one-half of th
22、e coupling, respectively. The force, or torque, shall not exceed the values shown in Table III.The Type I coupling shall have a clear and unmistakable visual indication that it is fully connected and open when viewed at a 90 angle to the axis from any side.The Type II coupling shall have a visual an
23、d touch feature that indicates the completely connected condition. The touch feature shall be clear and unmistakable.The coupling shall not inadvertently uncouple under a 20 g maximum load.TABLE III - Coupling Forces With the Indicated StaticPressure Applied to Both Halves3.5 Interchangeability:Coup
24、lings shall be interchangeable as a connected assembly (not individual coupling halves). It shall be impossible to interconnect different body sizes; however, it shall be permissible to jump tube sizes by changing the end fitting configuration. Couplings of different pressure classes shall not be ca
25、pable of cross-coupling.SAE INTERNATIONAL AS1709A Page 5 of 19_ 3.6 Performance:The self-sealing couplings furnished under this specification shall perform satisfactorily when conforming to the following performance requirements.3.6.1 Envelope, Weight, Materials: Each coupling half must conform to t
26、he applicable purchaser and supplier envelope dimension, weight control, materials, and finishes.3.6.2 Proof Pressure: Each coupling half must meet operational and leakage requirements after being subjected to proof pressure of 150% of operating pressure for a period of 1 minute (4.6.2).3.6.3 Extrem
27、e Temperature Functioning: Each coupling half shall show no malfunction during or after being subjected to extreme temperature testing from -65 to +275 F (4.6.3).3.6.4 Leakage: Coupling halves shall meet specified leakage requirements at 30-in static head of hydraulic fluid and at operating pressure
28、 (4.6.4).3.6.5 Vacuum: The connected and disconnected coupling shall meet inward leakage requirements with no evidence of malfunction or degradation, with the equivalent of 10 in of Hg applied and lines closed for 5 minutes (4.6.5).3.6.6 Surge Flow: Coupling halves shall meet leakage, operational, a
29、nd pressure drop requirements after being subjected to five times (three times for -16, two times for -20, and -24) the rated flow in each direction (4.6.6).3.6.7 Vibration: The connected and disconnected coupling halves with pressure cap and plug if required, shall be capable of withstanding the vi
30、bration environment specified herein without experiencing any malfunction or degradation. Couplings shall be pressurized with 15 psig pressure (4.6.7). The test set-up shall be as shown in Fig. 1.3.6.8 Impulse: The connected coupling and disconnected coupling halves with pressure cap and plug if req
31、uired, shall be capable of withstanding the impulse testing specified in ARP603 without any indication of malfunction. Pressure, rate of rise, and impulse form shall be per Table V and Fig. 2 (4.6.8).3.6.9 Endurance: Each coupling half shall be capable of withstanding 200 endurance cycles without an
32、y evidence of malfunction or serious degradation, with 15 psig pressure applied to each half (4.6.9).3.6.10 Manual Operation: Coupling halves shall be capable of being tested in accordance with specified requirements with no evidence of coupling forces, leakage, or spillage beyond the specified limi
33、ts. NOTE: Both coupling halves shall be installed in systems capable of accommodating some fluid displacement without pressure rise. The connecting force/torque and applied pressures shall be per Table III (4.6.10).SAE INTERNATIONAL AS1709A Page 6 of 19_ FIGURE 1 - Set-Up for Impulse and Vibration T
34、estSAE INTERNATIONAL AS1709A Page 7 of 19_ TABLE IV - Hose Lengths and Bend Radii for Impulse and Vibration TestsClass 1000HoseSizeEquivalentTube SizeHose LengthFlexible Section(in 0.25)Bend Radius(in 0.25)Based onMIL-H-25579-04 0.250 7.50 2.00-06 0.375 10.75 4.00-08 0.500 11.75 4.63-10 0.625 13.25
35、5.50-12 0.750 15.00 6.50-16 1.000 16.50 7.38-20 1.250 22.50 11.00-24 1.500 27.50 14.00Class 3000HoseSizeEquivalentTube SizeHose LengthFlexible Section(in 0.25)Bend Radii(in 0.25)Based onAS604-04 0.250 9.25 3.00-06 0.375 12.50 5.00-08 0.500 13.75 5.75-10 0.625 15.00 6.50-12 0.750 17.25 7.75-16 1.000
36、20.25 9.63-20 1.250 24.25 12.00Class 4000/5000HoseSizeEquivalentTube SizeHose LengthFlexible Section(in 0.25)Bend Radii(in 0.25)Based onAS614-04 0.250 9.25 3.00-06 0.375 12.50 5.00-08 0.500 13.75 5.75-10 0.625 15.00 6.50-12 0.750 17.25 7.75-16 1.000 20.25 9.63SAE INTERNATIONAL AS1709A Page 8 of 19_
37、TABLE V - Impulse Test (Per ARP603)FIGURE 2 - Graph of Pressure Impulse Cycle (Per ARP603)SAE INTERNATIONAL AS1709A Page 9 of 19_ FIGURE 3 - Set-up for Pressure Drop Test (Ref. ARP24)3.6.11 Air Inclusion: The air inclusion for all coupling halves shall be within specified limits per Table II and at
38、30 inches of oil pressure (4.6.11).3.6.12 Impact: Connected couplings and coupling halves (disconnected coupling halves with caps and plugs, if required) shall withstand a 20 g impact test without evidence of disconnection. Evidence of leakage or malfunction after the test is not permitted (4.6.12).
39、 This can be accomplished by 20 g acceleration during the vibration testing per 4.6.7.3.6.13 Pressure Drop: Each coupling shall indicate a pressure drop within the limits specified in Table I. The fluid temperature shall be 100 F 10 and test set-up shall be as shown in Fig. 3 (4.6.13).3.6.14 Burst T
40、est: Coupling halves shall be capable of withstanding 250% of operating pressure and 275 F temperature without fluid loss or rupture (4.6.14).SAE INTERNATIONAL AS1709A Page 10 of 19_ 3.7 Identification of Product:The coupling shall be marked for identification in accordance with MIL-STD-130. In addi
41、tion, each coupling shall be permanently marked with the customer (NSN, MS, Purchaser Assigned) part number, manufacturers part number, and the manufacturers name or code identification number. Class number (or operating pressure) shall be part of product identification. When available surface area
42、precludes complete identification, a tag may be attached.3.8 Workmanship:Workmanship shall be of the quality necessary to produce couplings free from all defects that would affect proper functioning in service.4. QUALITY ASSURANCE PROVISIONS:4.1 Inspection Responsibility:The supplier is responsible
43、for the performance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own or any other inspection records of the examination and tests. These records shall be kept complete and available to procuring agency as specified in the contract or
44、 order. The government and/or procuring agency reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements.4.2 Classification of Tests:The tests shall consist o
45、f qualification tests and acceptance tests (4.3 and 4.4, respectively).SAE INTERNATIONAL AS1709A Page 11 of 19_ 4.3 Qualification Tests:4.3.1 The qualification tests shall consist of the following tests which shall be conducted in the order shown. All tests are described in 4.6. Unless otherwise spe
46、cified, one test sample of each size shall be subjected to all indicated tests. Test samples shall be typical production units.Test Paragrapha. Examination of product 4.6.1b. Proof pressure 4.6.2c. Extreme temperature functioning 4.6.3d. Leakage 4.6.4e. Vacuum 4.6.5f. Surge flow 4.6.6g. Vibration 4.6.7h. Impulse 4.6.8i. Endurance 4.6.9j. Manual operatio
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