1、AEROSPACE STANDARD AS1710 REV. D Issued 1982-05 Revised 2009-02 Reaffirmed 2014-11 Superseding AS1710C Coupling, Fuel, Flexible, Variable Cavity, Threaded Type With Ferrules RATIONALE AS1710D has been reaffirmed to comply with the SAE five-year review policy. _ SAE Technical Standards Board Rules pr
2、ovide 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 applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the
3、user.” SAE reviews 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
4、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 DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email:
5、 CustomerServicesae.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/AS1710D 1. SCOPE This SAE Aerospace Standard (AS) defines the requirements for a threaded flexible coupling assembly, whi
6、ch utilizes ferrules or machined tube end fittings to join tubing and components in aircraft fuel and fuel vent or other systems. This coupling assembly is designed for use from -65 to +200 F and at 125 psig peak working pressure, and the coupling assembly may be used in other fluid systems when req
7、uirements are within the limits. 2. APPLICABLE DOCUMENTS The following documents form a part of this specification to the extent specified herein. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 72
8、4-776-4970 (outside USA), www.sae.org AMS-R-25988 Rubber, Fluorosilicone Elastomer, Oil-and-Fuel-Resistant, Sheet, Strips, Molded Parts, and Extruded Shapes AMS-WW-T-700/6 Tube, Aluminum Alloy, Drawn, Seamless, 6061 ARP9013 Statistical Product Acceptance Requirements AS567 Safety Cable, Safety Wire,
9、 Key Washers, and Cotter Pins for Propulsion Systems, General Practices for Use of AS568 Aerospace Size Standard for O-rings AS1055 Fire Testing of Flexible Hose, Tube Assemblies, Coils, Fittings, and Similar System Components AS1711 Coupling, Flexible, Variable Cavity, Threaded Ferrule Type Tube En
10、ds, Envelope Dimensions Design Standard AS1712 Coupling Subassembly, Flexible, Variable Cavity, Threaded, Ferrule Type Tube Ends AS1713 Half Coupling Subassembly, Flexible, Variable Cavity, Threaded, Ferrule Type Tube Ends AS1714 Nut Assembly, Coupling, Flexible, Variable Cavity, Threaded, Ferrule T
11、ype Tube Ends AS1715 Washer, Coupling, Flexible, Variable Cavity, Threaded, Ferrule Type Tube Ends AS1716 Ferrule, Coupling, Flexible, Variable Cavity, Threaded, Ferrule Tube End AS1717 Retainer, Coupling, Flexible, Variable Cavity, Threaded Ferrule Type Tube Ends AS1718 Coupling Body, Flexible, Var
12、iable Cavity, Threaded Ferrule Type Tube Ends AS1719 Fitting End, Half-Coupling, Flexible Variable Cavity Threaded, Ferrule Type Design Standard AS1720 Ferrule End, Coupling, Flexible Variable Cavity, Threaded, Ferrule Type, Design Standard AS4060 Tube Fitting Swaged Joint, Roller Expander, Manual P
13、rocess, Requirements for AS7003 NADCAP Program Requirements AS7112 National Aerospace and Defense Contractors Accreditation Program Requirements for Fluid System Components 2.2 U.S. Government Publications Available from Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Av
14、enue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. FED-STD-H28/2 Screw-Thread Standards for Federal Services Section 2: Unified Inch Screw Threads - UN and UNR Thread Forms MIL-HDBK-831 Military Handbook, Preparation of Test Reports MIL-L-10547 Liners, Case
15、 and Sheet, Overwrap; Water-Vaporproof or Waterproof, Flexible MIL-PRF-680 Performance Specification, Degreasing Solvent (Stoddard Solvent) MIL-PRF-7024 Performance Specification, Calibrating Fluids, Aircraft Fuel System Components MIL-STD-129 Military Marking for Shipment and Storage MIL-STD-130 Id
16、entification Marking of U.S. Military Property MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests MIL-STD-889 Dissimilar Metals MIL-STD-2073-1 Department of Defense, Standard Practice for Military Packaging PPP-B-566 Boxes, Folding, Paperboard PPP-B-585 Boxes, Wood, Wirebound
17、PPP-B-676 Boxes, Set-up VV-P-236 Petrolatum, Technical SAE INTERNATIONAL AS1710D Page 2 of 25_ 2.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 473 Standard Test Method for Sedimen
18、t in Crude Oils and Fuel Oils by the Extraction Method ASTM D 5118/D5118M Standard Practice for Fabrication of Fiberboard Shipping Boxes ASTM D 5486/D5486M Standard Specification for Pressure Sensitive Tape for Packaging, Box Closure, and Sealing ASTM D 6251/D6251M Standard Specification for Wood Cl
19、eated Panelboard Shipping Boxes 2.4 PRI Publications Available from Performance Review Institue, 161 Thornhill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD2001 Qualified Product Management Council Procedures for Qualified Products Group PD2101 Aerospace Quality Assuran
20、ce, Product Standard, Qualification Procedures, Fluid Systems 2.5 ASME Publications Available from American Society of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.org. ASME B1.1 Unified Inch Screw Threads (UN and UNR Thread Form) 2.6 ANSI
21、Publications Available on-line at www.asq.org or from American National Standards Institute, 25 West 43rdStreet, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ANSI/ASQC Z.1.4 Sampling Procedures and Tables for Inspection by Attributes. 3. TECHNICAL REQUIREMENTS 3.1 Qualification Full cou
22、pling assemblies furnished under this document shall be products that are qualified by meeting all of the requirements covered by this document. Manufacturers choosing to produce only a part or parts of the coupling assembly shall qualify the part or parts by complying with the requirements and perf
23、orming all tests of this document. The test specimens for qualification of a part or parts shall be completed with a qualified part or parts made by other manufacturers. Half coupling parts shall be qualified parts of the full coupling. 3.1.1 Manufacturer Qualification A manufacturer producing a pro
24、duct in conformance to this procurement specification shall be accredited in accordance with the requirements of PD2101, AS7003 and AS7112, and shall be listed in a Performance Review Institute (PRI) Qualified Manufacturers List (QML). 3.1.2 Product Qualification All products shall conform to the re
25、quirements of this procurement specification and shall be approved in accordance with the requirements of PD2001 and PD2101 for listing in a Performance Review Institute (PRI) Qualified Parts List (QPL). SAE INTERNATIONAL AS1710D Page 3 of 25_ 3.2 Materials and Finishes Materials and finishes for th
26、e components shall be those designated on standards and drawings. Alternate materials and substitutions shall be approved by the purchaser. All materials and finishes shall be uniform in quality, free from defects, suitable for the purpose intended, and consistent with good manufacturing practices.
27、3.2.1 Dissimilar Materials Materials shall possess adequate corrosion-resistance characteristics or shall be suitably protected by the use of finishes to resist corrosion which may result from such conditions as dissimilar metal combinations, moisture, salt spray, and high-temperature deterioration.
28、 Dissimilar materials are defined by MIL-STD-889. 3.3 Design and Construction The coupling shall be a lightweight, flexible connection with O-ring seals. It shall be designed for engine feed and pressure fueling at 125 psig static working pressure in sizes up through -64 and for 30 psig for dump and
29、 vent lines in sizes from -72 up to and including size -88. The coupling shall operate at temperature extremes of -65 to +200 F at static pressures, and -40 to +135 F for pressure surging and dynamic operation during fueling and flight. The coupling shall function at a maximum misalignment of 4 degr
30、ees or with a maximum gap of .250 in, or in combination, a minimum gap of .062 in at a 3 degree misalignment. 3.3.1 Coupling Components The coupling assembly shall consist of the components shown as follows in Tables 1 and 2: SAE INTERNATIONAL AS1710D Page 4 of 25_ TABLE 1 - FULL COUPLING ASSEMBLY Q
31、ty Description Standard No. One Two Two Two One Two Nut Assembly Washers Ferrules Retainer Halves Body O-rings /3/ AS1714 AS1715 AS1716 /1/ AS1717 /2/ AS1718 /1/ Ferrules are attached to tubing by roller swaging or bulge forming in accordance with user specifications. Roller swaging shall conform to
32、 AS4060. /2/ One retainer required for sizes -80 and -88. /3/ Not part of assembly and supplied by user. TABLE 2 - HALF COUPLING ASSEMBLY Qty Description Standard No. One Two One One One Nut Assembly Washers Ferrule Fitting End O-rings /3/ AS1714 AS1715 AS1716 /1/ AS1719 /2/ /1/ Ferrules are attache
33、d to tubing by roller swaging or bulge forming in accordance with user specifications. Roller swaging shall conform to AS4060. /2/ Recommended design standard and supplied by user. /3/ Not part of assembly and supplied by user. Full coupling subassembly (AS1712) and half coupling subassembly (AS1713
34、) are provided to simplify drawing call outs and to aid in tubing fabrication and installation. Subassemblies consist of components listed except for ferrules. Ferrules are usually installed during the fabrication of tubing. The other coupling components are not needed until final assembly. Fitting
35、ends in accordance with design standard AS1720 may be used with coupling assemblies instead of the ferrule type tube end. 3.3.2 Threads Threads shall be in accordance with Federal Standard H28/2 or ASME B1.1. 3.3.3 Seals O-rings are not considered a part of this document except for coupling qualific
36、ation test requirements. O-ring sizes for the couplings are given in Table 3. SAE INTERNATIONAL AS1710D Page 5 of 25_ TABLE 3 - FUEL SYSTEM PRESSURE AND TEMPERATURE REQUIREMENT Basic System Criteria Temperature Range -65 to 200 F Test Requirements AS568 Peak Static (Tests) /3/ Dynamic (Tests) /3/ Tu
37、be O-ring Operating Working Test Test Size Dash Pressure /1/ Pressure Proof Temperature Temperature Dash in Size Negative Positive /2/ Negative Positive Burst F Flexure Surge F /4/ System Size Ref Ref in Hg psig psig in Hg psig psig Min Max psig psig Min Max Engine Speed Pressure Fueling and Dump Fu
38、el Tank Vent 08 10 12 16 20 24 28 32 36 40 44 48 56 64 72 80 88 .500 .625 .750 1.000 1.250 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.500 4.000 4.5 5.0 5.5 114 116 212 216 220 326 328 330 332 334 336 338 342 346 426 430 434 24 24 24 24 24 24 24 24 10 10 10 10 10 10 10 10 10 60 60 60 60 60 60 60 60
39、60 60 60 60 60 60 15 15 15 125 125 125 125 125 125 125 125 125 125 125 125 125 125 30 30 30 28 28 28 28 28 28 28 28 12 12 12 12 12 12 12 12 12 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 375 375 375 375 375 375 375 375 375 375 375 375 375 375 375 375 375 -65 -65 -65 -65 -65 -
40、65 -65 -65 -65 -65 -65 -65 -65 -65 -65 -65 -65 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 60 60 60 60 60 60 60 60 60 60 60 60 60 60 15 15 15 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-125 0-30 0-30 0-30 -40 -40 -40 -40 -40 -40 -40 -40 -40
41、 -40 -40 -40 -40 -40 -40 -40 -40 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 135 NOTES: /1/ The operating pressure shown here is the pressure range between the normal, continuous pump pressure and the maximumnegative pressure (suction) that can occur. /2/ The peak working pressur
42、e represents maximum surge conditions, pressure spikes. /3/ The static test simulates ground operations, the dynamic test simulates flight operations. /4/ Surge tests are conducted at room temperature and at 135 F (4.6.7). SAE INTERNATIONAL AS1710D Page 6 of 25_ 3.4 Dimensions The coupling assembly
43、envelope dimensions shall be as specified in AS1711. Part dimensions shall be as specified in applicable part standards. 3.4.1 Coupling Weight The coupling assembly and components shall not exceed the maximum weights listed on the applicable standard or drawing. 3.5 Performance The coupling assembly
44、 shall meet the following performance requirements: 3.5.1 Leakage 3.5.1.1 Liquid Leakage The test assembly shall be subjected to the positive proof pressures listed in Table 3. Any leakage sufficient to form a drop while pressurized or evidence of other malfunctions shall be cause for rejection. The
45、 test method is specified in 4.6.2.2. 3.5.1.2 Vacuum Leakage The test assembly shall be subjected to the negative proof pressures listed in Table 3. A decrease in the negative pressure exceeding .5 in Hg within 5 min shall be cause for rejection. The test method is specified in 4.6.2.1. 3.5.1.3 Pneu
46、matic Leakage The test assembly shall be subjected to a pneumatic pressure equal to the proof pressure listed in Table 3 for a period of 3 min at room temperture. Any evidence of pneumatic leakage after 1 min at pressure or other malfunctions that would affect the performance of the assembly will be
47、 cause for rejection when tested as specified in 4.6.2.3. 3.5.2 Fuel Resistance The coupling assembly shall not leak (sufficient to form a drop) nor show evidence of malfunction when subjected to fuel resistance testing at high temperature fuel aging at +200 F, low temperature fuel aging at -65 F, and air dry out at +200 F. The test procedure and duration of aging is specified in 4.6.3. 3.5.3 Vibration The coupling assembly shall show no evidence of malfunction or structural failure and shall not leak (sufficient to form a drop) when subjected to
