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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 ther
2、efrom, 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 suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication
3、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: 724-776-4970 (outside USA
4、) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AS85720A AEROSPACE STANDARD Issued 1998-07 Reaffirmed 2004-04 Revised 2008-09 Superseding AS85720 Fittings, Tube, Fluid Systems, Separable, High Pressure Dynamic Beam Seal, 5000/8000 psi, General Specification For F
5、SC 4730 RATIONALE This standard is revised to correct minor errors and to provide for PRI-QPL requirements and to establish PRI-QPL- AS85720. 1. SCOPE 1.1 Scope This specification covers the design requirements and test procedures for separable beam seal fittings which include end fittings (see 2.4.
6、2), connectors (see 2.4.3), and boss fittings for use in aerospace fluid systems. Design requirements are for Class 5000 and 8000 in titanium, and corrosion resistant steel (CRES). Definition of fittings and related terms are defined in 2.4. 1.2 Classification Fittings shall be of the following type
7、 and pressure classes of fluid systems as specified below: 1.2.1 Type, as defined in Hydraulic System Specifications AS5440 and AS8775. a. Type II System - Temperature range -65 to + 275 F b. Type lll System - Temperature range -65 to + 450 F 1.2.2 Pressure Classes a. Class 5000 - 5000 psi nominal o
8、perating pressure. b. Class 8000 - 8000 psi nominal operating pressure. SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS85720A SAEAS85720A- 2 - 2. REFERENCES 2.1 Applicable Documents The following publications form a part of t
9、his document to the extent specified herein. The latest issue of SAE 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 the references cited herein, the te
10、xt of this document takes precedence. Nothing in this document however, supersedes applicable laws and regulations unless a specified exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA
11、 and Canada) or 724-776-4970 (outside USA), www.sae.org. AS603 Hose, Hydraulic, Tubing and Fitting Assemblies, Impulse Testing of AS1701 Lubricant, Solid Film AS8879 Screw Threads, Controlled Radius Root with Increased Minor Diameter, General Specifications for AS1055 Hose, Flexible, Tube Assemblies
12、, Coils, Fittings and System Components, Fire Testing of ARP1185 Flexure Testing of Hydraulic Tubing Joints and Fittings AIR1377 Fire Test Equipment for Flexible Hose and Tube Assemblies AS4510/2 Fittings, Weld to Beam Seal, Fluid Connection AS5272 Lubricant, Solid Film, Heat Cured, Corrosion Inhibi
13、ting Procurement Specification AS9100 Quality Systems - Aerospace Model for Quality Assurance in Design, Development, Production, Installation and Servicing AS85720/1 Fitting End, Standard Dimensions for Beam Seal, Male AMS4921 Titanium, Bars, Forgings, and Rings, Annealed, 70,000 psi (485 MPa) Yiel
14、d Strength AMS4928 Titanium Alloy, Bars, Forgings and Rings 6Al-4V, Annealed, 120,000 psi (825 MPa) Yield Strength AMS4946 Titanium Alloy Tubing, Seamless, Hydraulic - 3.0Al - 2.5V, Texture Controlled, 105,000 psi (724 MPa) Yield Strength AMS4965 Titanium Alloy, Bars, Forgings and Rings, 6.0Al - 4.0
15、V, Solution and Precipitation Heat Treated AMS5561 Tubing, Steel, Welded and Drawn, Corrosion and Heat Resistant 9.0Mn - 20Cr - 6.5Ni - 0.28N, High Pressure Hydraulic AMS5637 Steel Bars, Corrosion Resistant 18Cr - 9.0Ni (SAE 30302) Cold Drawn, 125,000 psi (860 MPa), Tensile Strength AMS5643 Steel Ba
16、rs, Forgings, Tubing and Rings, Corrosion Resistant, 16Cr - 4.0Ni - 0.30(Cb+Ta) - 4.0 Cu Solution Heat Treated SAEAS85720A- 3 - AMS5656 Bar, Steel, Forgings and Rings, Corrosion Resistant 9.0Mn - 20Cr - 6.5Ni - 0.27N AMS5659Bar, Forgings and Rings, Corrosion Resistant 15Cr - 4.5Ni - 0.30(Cb + Ta) -
17、3.5Cu Consumable Electrode Melted, Solution Heat Treated, Precipitation Hardenable 2.1.2 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quic
18、ksearch/. MIL-PRF-5606 Hydraulic Fluid, Petroleum Base; Aircraft, Missile and Ordnance MIL-PRF-83282 Hydraulic Fluid, Fire-Resistant, Synthetic Hydrocarbon Base, Aircraft, Metric, NATO Code Number H-537 MIL-HDBK-505Definitions of Item Levels, Item Exchangeability, Models and Related Terms MIL-STD-12
19、9 Marking for Shipment and Storage (Part 1 of 4 Parts) MIL-STD-1916DoD Preferred Method for Acceptance of Product MIL-STD-2073-1 DoD Standard Practice for Military Packaging Requirements 2.1.3 ASME Publications Available from ASME, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-
20、1170, www.asme.org. ASME B46.1 Surface Texture (Surface Roughness, Waviness and Lay) ASME Y14.100 Engineering Drawing Practices ASME Y14.35M Revision of Engineering Drawings and Associated Documents 2.1.4 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West
21、 Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 1974 Fiberboard Shipping Containers, Methods of Closing, Sealing, and Reinforcing, Standard Practice for ASTM D 3951 Packaging, Commercial ASTM D 6251/D6251M Standard Specification for Wood-Cleated Panel Board Shipping Boxes 2.1.5
22、 PRI Publications Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD2001Tasks and Procedures of the Qualification Product Management Council PD2101 Qualified Management Product Council for Qualified Products Groups
23、PD2101Qualified Management Product Council for Qualified Products Group SAEAS85720A- 4 - AC7112 National Aerospace and Defense Contractors Accreditation Program (NADCAP) - Fluid Systems Components Manufacturing Requirements AC7112/2 National Aerospace and Defense Contractors Accreditation Program Re
24、quirements for Fittings and Other Machined Components PRI-QPL-AS85720 Qualified Products List, Fittings (QPL), Tube, Fluid Systems, Separable, Beam Seal, 5000/8000 psi 2.1.6 AIA Publications Available from Aerospace Industries Association. 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3928,
25、 Tel: 703-358-1000, www.aia.aerospace.org NAS847 Caps and Plugs, Protective, Dust and Moisture Seal 2.2 Other Referenced Publications The documents below are referenced for information only but are not part of the specific requirements of this standard. 2.2.1 SAE Publications Available from SAE Inte
26、rnational, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AS5440 Hydraulic Systems, Aircraft, Design and Installation Requirements For AS8775 Hydraulic System Components, Aircraft and Missiles, General Specific
27、ations For 2.3 Order of Precedence In the event of conflict between the text of this document and the references cited herein (except for related associated detail specifications, specification sheets, or MS standards), the text of this document takes precedence. Nothing in this document, however, s
28、upersedes applicable laws and regulations unless a specific exemption has been obtained. 2.4 Definitions 2.4.1 BEAM SEAL FITTINGS These are a class of separable fittings which are designed to mate with a standardized 8-1/2 degree male end (AS85720/1). The name comes from the female sealing system wh
29、ich employs an elastic “ beam” which acts as a dynamic lip type seal. A secondary, axially very stiff seal also mates on the 8-1/2 degree male face to allow for developing high torque induced preloads while providing a deflection limit to the elastic primary seal. 2.4.2 END FITTING Fitting(s) which
30、are permanently attached to the tubing end. For beam seal fittings, this type fitting consists of a threaded male fitting (having geometry per AS85720/1) or a female fitting having an internally threaded nut attached with a swivel wire (wired-on) or equivalent means, or a non-attached nut having sli
31、p-on geometry. 2.4.3 CONNECTOR A fitting, not directly attached to tubing, which connects end fittings or bosses or ports, one with another by means of threads and compatible seal faces. SAEAS85720A- 5 - 2.4.4 LEAKAGE Is defined as the escape of fluid (gaseous or liquid) from any point of a “ sealed
32、” system. For purposes of qualification testing, leakage is further defined as any fluid escape from the test fitting or fitting junction as understood to include a distance of tubing of one nominal diameter in length beyond the fitting envelope. 2.4.5 LOT Is defined as all parts of a given part num
33、ber made from the same batch of material and processed at the same time. 3. TECHNICAL REQUIREMENTS 3.1 Qualification The fittings and fitting bodies furnished under this specification shall be products which are authorized by the qualifying activity for listing on the applicable qualified products l
34、ist at the time of award of contract (see 4.3 and 6.5) 3.1.1 Product Qualification Fittings and nuts furnished under this specification shall be representative of products which have been qualified to the requirements of 4.3. All products shall conform to this procurement specification and shall be
35、approved in accordance with the requirements of PD2001 and PD2101 for listing in the PRI Qualified Products List (QPL) PRI-QPL-AS85720 (http:/www.pri.sae.org/QPL/qpl-list.htm). See also http:/www.eAuditN. 3.1.2 Manufacturer Qualification A manufacturer producing a product in conformance to this proc
36、urement specification shall be accredited in accordance with the requirements of PD2101, AS9100 and AC7112 and AC112/2 and will be listed in the PRI Qualified Manufacturers List (QML). 3.2 Material 3.2.1 Fittings The material used shall be titanium alloys, or corrosion resistant steels as specified
37、in Table 1. All fittings shall be designed for the class 5000 system but may be qualified to class 8000. For lower pressures, see AS85421. The material shall be heat treated, as required, and have surface protection to meet the test requirements of this specification. 3.2.2 Recycled, Recovered, or E
38、nvironmentally Preferable Materials Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided the materials meet or exceed the operational and maintenance requirements, and promote economically advantageous life cycle costs. SAEAS85720A- 6 -
39、 TABLE 1 - FITTING AND TUBING MATERIALS Item Name Titanium CRES Nuts Internally Threaded AMS4965 AMS5643 or AMS5659 Condition H1075 Fitting Bodies AMS4965, AMS4928, or AMS4921 AMS5643 or AMS5659 Condition H1075 or AMS5656 Tubing AMS4946 AMS5561 Swivel Wires AMS5637 with dry lube Per AS5272 Type I or
40、 Type II; or, AS1701 Type III or Type IV 3.2.3 Tubing The tubing used for the fabrication of the test fitting assemblies shall be in accordance with Tables 1 and 2. 3.3 Design and Construction 3.3.1 Configuration and Dimensions The configuration and dimensions shall conform to requirements of this d
41、ocument and the design requirements specified on the applicable specification sheet AS85720/1, as well as any of the applicable AS standard sheets for beam seal fittings. 3.3.2 Drill Offset On fittings where the fluid passage is drilled from each end, the offset between the drilled holes at the meet
42、ing point of the drills shall not exceed 0.015 inch. Angular misalignment shall not exceed 2 degrees. 3.3.3 Reduction in Fluid Passage (Bore) Cross-Section Straight and non-reducer shape fittings shall be bored through-out the passage such that a ball having a diameter, 0.020 inch less than the mini
43、mum specified bore shall pass through the passage. For non-straight and reducer shape fittings (such as crosses, tees, elbows, etc.) the cross-sectional area at the junction of the fluid passage shall not be smaller than the cross-sectional area of the smallest passage. 3.3.4 Tube Attachment The met
44、hod of joining the tubing to the end fitting (brazing, welding, mechanical attachment, swaging, etc.) shall not adversely affect the properties, strength, or geometry of the tubing or end fitting, as verified by the performance requirements of this specification. The joint shall be of a quality comp
45、atible with the design and performance requirements of this specification and shall permit inspection by direct measurement, X-ray, or other means. 3.3.5 Installation Tooling Size of tool envelope required to install fittings on tubing in aircraft shall be kept to a minimum. The wrench flats or pads
46、 of the fittings shall permit use of standard wrenches. SAEAS85720A- 7 - TABLE 2 - FITTING AND TUBING DATA AND STRESS LEVEL FOR FLEXURE TEST TABLE 2A - 5000 PSI CRES TUBING SIZES AND BENDING STRESSES Tube Size Tube Wall Endurance Point Bending Stress 10 Million cycles, min (psi) Data Point 1 Bending
47、 Stress 50 000 cycles, min (psi) Data Point 2 Bending Stress 100 000 cycles, min (psi) Data Point 3 Bending Stress 1 000 000 cycles, min (psi) -03 -04 -05 -06 -07 -08 -09 -10 -11 -12 -14 -16 -20 .020 .020 .025 .030 .034 .039 .044 .049 .053 .058 .068 .078 .040* 24 000 24 000 24 000 22 000 21 000 20 0
48、00 19 000 18 000 17 000 16 000 15 500 15 000 15 000 37 460 37 460 37 460 34 720 32 700 31 000 29 540 28 000 26 470 24 950 24 170 23 400 23 400 33 630 33 630 33 630 31 270 29 600 28 000 26 630 25 220 23 800 22 400 21 670 20 980 20 980 27 550 27 550 27 550 25 560 24 400 23 260 22 090 20 940 19 780 18
49、600 18 000 17 400 17 400 TABLE 2B - 5000 PSI TITANIUM TUBING SIZES AND BENDING STRESSES Tube Size Tube Wall Endurance Point Bending Stress 10 Million cycles, min (psi) Data Point 1 Bending Stress 50 000 cycles, min (psi) Data Point 2 Bending Stress 100 000 cycles, min (psi) Data Point 3 Bending Stress 1 000 000 cycles, min (psi) -03 -04 -05 -06 -07 -08 -09 -10 -11 -12 -14 -16 -20 .020 .022 .027 .032 .038 .043 .048 .054 .061 .065