1、_ 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 applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the 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 2013 SAE International All rights reserved. No part of this p
3、ublication 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 DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS18802AEROSPACESTANDARDAS18802Issued 1998-01 Reaffirmed 2013-08 Fuel and Oil Line
5、s, Aircraft, Installation of RATIONALE AS18802 has been reaffirmed to comply with the SAE five-year review policy. NOTICEThis document has been taken directly from U.S. Military Specification MIL-I-18802A, Amendment 1, and contains only minor editorial and format changes required to bring it into co
6、nformance with the publishing requirements of SAE technical standards. The initial release of this document is intended to replace MIL-I-18802A, Amendment 1. Any part numbers established by the original specification remain unchanged.The original Military Specification was adopted as an SAE standard
7、 under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus
8、 voting at the SAE Committee level, and (b) the use of the existing government specification or standard format.Any material relating to qualified product lists has not been adopted by SAE. This material was part of the original military specification and is reprinted here for historic reference onl
9、y.1. SCOPE:1.1 Scope:This specification covers the requirements for installation of fuel and oil lines in aircraft, except those lines furnished as part of the engine.2. APPLICABLE DOCUMENTS:2.1 The following documents, of the issue in effect on date of invitations for bids, form a part of this spec
10、ification, to the extent specified herein:SPECIFICATIONSFederalWW-T-787 Tubing, Aluminum-Alloy, Round, Square, Rectangular and other Shapes, Seamless Drawn, 5052WW-T-789 Tubing, Aluminum-Alloy, Round, Square, Rectangular and other Shapes, Seamless Drawn, 6061 and 6062MilitaryMIL-B-5087 Bonding, Elec
11、trical (for aircraft)MIL-T-5578 Tank, Fuel, Aircraft, Self-SealingMIL-T-5579 Tank, Self-Sealing Oil, AircraftMIL-T-6396 Tank, Fuel, Oil, Water-Alcohol, Aircraft, Non-Self-Sealing, Removable, InternalMIL-S-7742 Screw Threads, Standard, Optimum Selected Series: General Specification forMIL-T-8606 Tubi
12、ng, Steel, Corrosion-Resistant (18-8 Stabilized)MIL-D-8706 Design Data for AircraftMIL-H-8794 Hose, Rubber, Hydraulic, Pneumatic, Fuel and Oil ResistantMIL-H-8795 Hose Assemblies, Hydraulic, Pneumatic, Fuel and Oil ResistantMIL-F-18280 Fittings, Flareless, Fluid ConnectionMIL-T-18847 Tank, Fuel, Air
13、craft, Auxiliary External, Design and Installation ofMIL-C-22263 Coupling, Fuel Line, Flexible, 125 PSIMIL-H-25579 Hose Assembly, Tetrafluoroethylene, High Temperature, Power Plant, AircraftJAN-A-669 Anti-Seize-Compound, White-Lead-Base, General Purpose (for Threaded Fittings)SAE INTERNATIONAL AS188
14、02 Page 2 of 10_ 2.1 (Continued):STANDARDSMilitaryMIL-STD-143 Specifications and Standards, Order of Precedence for the Selection ofMS 21919 Clamp, Cushioned, Tube Support, Loop-Type, AircraftMS 28740 Fitting End, Hydraulic, Pneumatic, Fuel and Oil HoseMS 28741 Hose Assembly, Detachable End Fittings
15、, Medium PressureMS 33514 Fitting End, Standard Dimensions for Flareless Tube Connections and Gasket SealMS 33515 Fitting End, Standard Dimensions for Bulkhead Flareless Tube ConnectionsMS 33583 Tubing End, Standard Dimensions for Double FlareMS 33584 Tubing End, Standard Dimensions for FlaredMS 335
16、86 Metals, Definitions of DissimilarMS 33611 Tube Bend RadiiMS 33656 Fitting End, Standard Dimensions for FlaredMS 33657 Fitting End, Standard Dimensions for Bulkhead Flared Tube ConnectionsMS 33786 Fitting Installations, Flared Tube and Hose, SwivelAir Force-Navy AeronauticalAND 10064 Fittings, Ins
17、tallation of Flared Tube Straight Threaded ConnectorsAND 10104 Tubing, Steel, Corrosion-Resistant, Round, Standard Dimensions forAND 10375 Colors, Fluid Line IdentificationAN 735 Clamp, Loop-Type Bonding(When requesting specifications, standards, publications and drawings refer to both title and num
18、ber.Copies of this specification and applicable specifications may be obtained upon application to the Commanding Officer, Naval Aviation Supply Depot, Code CDS, 5801 Tabor Avenue, Philadelphia 20, Pennsylvania.)3. REQUIREMENTS:3.1 Components:The approval and installation of components under this sp
19、ecification apply to static components as distinguished from such other components as pumps, valves, strainers, filters, filler units, filler caps, fuel c.g. control units, fuel transfer pressure regulators, fuel tank pressure control units. Static components will generally include lines, fittings a
20、nd tanks.SAE INTERNATIONAL AS18802 Page 3 of 10_ 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 except as provided in 3.2.1 and 3.2.2.3.2.1 Commercial parts: Comme
21、rcial parts having suitable properties may be used where, on date of invitation for bids, there are no suitable standard parts. Commercial utility parts, such as screws, bolts, nuts, cotter pins, having suitable properties may be used provided:a. They can be replaced by standard parts (MS or AN) wit
22、hout alteration.b. The corresponding standard part numbers are referenced in the parts list and, if practicable, on the contractors drawings.3.2.2 Standard parts: With the exception of 3.2.1, MS and AN standard parts shall be used where they suit the purpose. They shall be identified on the drawings
23、 by their part numbers.3.3 Materials:Materials shall be suitable for the intended purpose and shall conform to applicable Government specifications.3.3.1 Metals: Magnesium shall not be used in fuel and oil line installations.3.3.2 Dissimilar Metals: Dissimilar metals, as outlined in Standard MS 3358
24、6, shall not be used in intimate contact with each other, unless suitably protected against electrolytic corrosion.3.3.3 Screw Threads: Screw threads shall conform to Specification MIL-S-7742. Pipe threads shall not be used in fuel and oil line installations.3.3.4 Plastics: Plastic lines shall not b
25、e used unless specifically approved by the Bureau of Naval Weapons.3.4 Protection against fire:Within power plants compartments and other locations where fires are likely to occur as a result of flammable fluid leakage, all fluid carrying lines and other fluid containers shall be capable of enduring
26、 a 2000F flame for a period of five (5) minutes without leakage, with fluid flow through the lines. The lines shall be approved flexible assemblies. Such approval shall be by the Bureau of Naval Weapons and will be based on the Contractors requirements of the particular airplane installation involve
27、d.SAE INTERNATIONAL AS18802 Page 4 of 10_ 3.5 Design and Location:3.5.1 Design of Line Installation: Fuel and oil lines shall be readily replaceable in service, and shall follow the simplest and most direct route possible, consistent with the airplane design. Piping connections shall be so located t
28、hat they are readily accessible for inspection and maintenance.Fuel lines shall not be installed in cockpit or cabin areas. When fuel and oil lines pass through spaces containing possible ignition sources, they shall be located as low as practicable within the space. Fuel and oil shall not be led ov
29、er exhaust or other high temperature piping and shall not parallel this piping within six (6) inches. Lines may cross within this distance if suitably protected with a shield or insulation.3.5.2 Piping Selection: Pressure fuel lines may be of aluminum alloy tubing conforming to specifications WW-T-7
30、87 or WW-T-789, or of corrosion resistant steel tubing conforming to specificationMIL-T-8606. Where flexible lines are required they shall conform to specification MIL-H-8795 andMIL-H-25579.3.5.3 Fitting and Line Location: Where similar size lines are adjacent, fittings shall terminate at locations
31、sufficiently separated to prevent cross connections of the lines.3.5.4 Traps: Piping and fittings shall be installed with a minimum restriction to flow. Traps in which water, air or vapor can collect shall be avoided. Drains shall be provided for all trapped lines.3.5.5 Vulnerability: Fuel and oil l
32、ines shall be routed to obtain maximum protection by the aircraft structure when subjected to gunfire. Such consideration shall be classed as secondary to requirements related to protection against fire. Fuel lines may be routed through fuel tanks.3.5.6 Anti-Seize Compound: All male threads and meta
33、llic gaskets on fittings shall be coated with an anti-seize compound conforming to Specification JAN-A-669. Caution shall be taken to prevent any of the compound from entering the system.3.5.7 Accessory Units: All accessory units such as filters, valves, etc., the weight or operation of which impose
34、 adverse stresses or vibration on the tubing, shall be supported by means other than the tubing. If rigid connections are used between accessories, then all accessories so connected shall be rigidly mounted on the same base.3.5.8 Identification: Fuel and oil lines shall be identified by color markin
35、gs in accordance with Standard AND 10375. Only stamping or etching shall be used for identification on any lines passing through fuel or oil tanks.3.5.9 Use of special fittings other than JAN, MS or AN standard fittings, will not be approved unless conclusive evidence of the need thereof is presente
36、d.SAE INTERNATIONAL AS18802 Page 5 of 10_ 3.5.10 Approved special fittings, when authorized, shall conform to the applicable MS and AND standards as regards the means of making connections to mating parts, i.e., flares, threads, bosses and pads.3.5.10.1 Bosses and pads to which fittings are attached
37、, shall conform to the applicable MS, AND and AN standards.3.5.10.2 Gaskets, O-rings and similar non-metallic parts shall conform to the applicable MS and AND standards, and shall be made of materials suitable for its design function in the fuel or oil system and for the particular fuel and/or oil d
38、esignated in the aircraft detail specification.3.5.11 Bonding: Fuel and oil lines shall be bonded in accordance with Specification MIL-B-5087 and Standard AN 735.3.6 Metal Tubing Fuel and Oil Lines and Connections:3.6.1 Selection: Fuel and oil system lines and connections shall be in accordance with
39、 the applicable MS and AND standards listed in paragraph 2 herein.3.6.2 Material: Metal tubing shall be fabricated of aluminum alloy conforming to SpecificationsWW-T-787 and WW-T-789, or of corrosion resistant steel conforming to SpecificationMIL-T-8606.SAE INTERNATIONAL AS18802 Page 6 of 10_ 3.6.3
40、Dimensions: Tubing shall be restricted to the sizes and wall thicknesses specified in Table I.NOTE. Aluminum fuel lines up to 2 inches OD located inside the tanks, may have wall thickness of .035 inch.3.6.4 Tubing support: Tubing shall be adequately supported at approximately 24 inch intervals by th
41、e use of looped type cushioned clamp supports conforming to Standard MS 21919 except where such support will interfere with the proper performance of flexible connections. Cushioned clamp supports need not be provided inside fuel or oil tanks. Special care shall be taken to avoid the existence of un
42、supported sections of fuel and oil lines whose natural frequency will be such that dangerous amplitudes of vibration may occur in operation, thereby leading to tubing failure.3.6.5 Tubing Bends: Bends shall be uniform without kinks or waves, with minimum bend radii conforming to Standard MS 33611.TA
43、BLE I TUBE SIZE AND WALL THICKNESSMinimum Wall Thickness(inches)Tube OD Aluminum CRES Steel Drain and Vent Lines(inches) (Other than drain and vent lines)1/4 .028 .016 -3/8 .028 .022 .0221/2 .035 .028 .0225/8 .042 .028 .0283/4 .042 .028 .0281 .049 .035 .0351 .049 .035 .0351 .049 .035 .0352 .049 .035
44、 .0352 .055 .049 .0353 and over To be determinedSAE INTERNATIONAL AS18802 Page 7 of 10_ 3.6.6 Tubing Connections:3.6.6.1 Flared Tube Connections: Solid connections for 1/4 and 3/8 inch aluminum alloy tubing shall use double flared tubing conforming to Standard MS 33584, and shall use MS or AN flared
45、 tube fittings. Connections for bulkheads and firewalls shall employ MS or AN flared tube fittings and fitting ends conforming to Standard MS 33657.3.6.6.2 Flareless Connections: Flareless fittings shall conform to Specification MIL-F-18280.3.6.7 Wrench Torque: To assemble flared tube joints, the wr
46、ench torque values shall conform toStandard AND 10064.3.7 Flexible Hose Fuel and Oil Lines and Connections:3.7.1 Flexible Couplings: Minimum of 1 inch OD flexible tube couplings may be used provided:a. They receive specific approval of the Bureau of Naval Weapons.b. They shall conform to Specificati
47、on MIL-C-22263.c. They shall be kept to an absolute minimum.d. They are all of the same type.e. They shall meet the requirements of the installation as regards temperature, surge pressures, vibration, etc.3.7.1.1 Alignment: Where a coupled joint is close to rigid structural attachments, the alignment and gap shall not exceed the prescribed requirements of the coupling manufacturer.3.7.2 Flexible Bellows and Convoluted Tubing: Installations of this type
