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 2017 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.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AS6369 AEROSPACE STANDARD AS6369 Issued 2017-12 Coupling Assembly, V-Band Sheet Metal Wide Flan
5、ge, Pneumatic Tube RATIONALE This aerospace standard is a departure from the prior qualification practices for the V-band coupling assemblies, AS4751. Prior practice sought to validate this type of assembled coupling design by conducting proof pressure testing but exceeded allowable leakage. AS6369
6、is to replace AS4751 for future design. 1. SCOPE This SAE Aerospace Standard (AS) establishes the requirements for a grooved clamp coupling and flanges suitable for joining intermediate pressure and temperature ducting in aircraft pneumatic systems. The coupling joint assembly, hereafter referred to
7、 as “the joint“, shall operate within the temperature range of -65 F external ambient to +800 F internal fluid. 2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of ot
8、her 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, however, supersedes applicable laws and regulations unless a
9、specific exemption has been obtained. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AS478 Identification Marking Methods AS7479 Bolts and Screws, Steel
10、, UNS S66286 1650 F Solution Heat Treated Precipitation Heat Treated Before Roll Threaded AS8879 Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter 2.2 U.S. Military Specifications and Standards Copies of these documents are available at http:/quicksearch.dla.mil.
11、 MIL-STD-130 Identification Marking of US Military Property MIL-HDBK-831 Preparation of Test Reports SAE INTERNATIONAL AS6369 Page 2 of 20 2.3 NAS Publication Available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3928, Tel: 703-358-1000, www.aia-aero
12、space.org. NASM25027 Nut Self Locking 2.4 ASME Standards Available from ASME, P.O. Box 2900, 22 Law Drive, Fairfield, NJ 07007-2900, Tel: 800-843-2763 (U.S./Canada), 001-800-843-2763 (Mexico), 973-882-1170 (outside North America), www.asme.org. ASME Y14.100 Engineering Drawing Practices 2.5 AWS Stan
13、dards Available from American Welding Society, 8669 NW 36 Street, #130, Miami, FL 33166-6672, Tel: 1-800-443-9353 or 305-443-9353, www.aws.org. AWS D17.1/D17.1M Specification for Fusion Welding for Aerospace Applications AWS D17.2/D17.2M Welding, Resistance Spot and Seam 3. TECHNICAL REQUIREMENTS 3.
14、1 Qualification The joint furnished under this specification shall be representative of products which have been subjected to and which have successfully passed the tests specified in this standard. 3.2 Materials The joint component materials shall be uniform in quality, free from defects, suitable
15、for service, consistent with good manufacturing practices, and in conformance with the applicable specifications and requirements stated herein. Specific materials used in the joint components shall be specified on the applicable AS standard drawing. 3.2.1 Duct Material Duct materials shall be stain
16、less steel. The coupling shall meet the requirements herein when assembled on stainless steel flanges. 3.2.2 Equipment Flanges Equipment Flange materials shall be stainless steel for stainless steel tubing. The flange may be sheet metal formed, solid, machined, forged, or cast shape. 3.3 Design and
17、Construction The joint consisting of coupling and flanges listed in Table 1 shall fulfill all design and performance requirements of this specification. 3.3.1 Coupling The material of the coupling shall be corrosion resistant steel as specified on the applicable AS drawing noted in Table 1. 3.3.1.1
18、Coupling Retainer Strength The coupling shall maintain joint integrity at operating pressure in the event of coupling retainer failure. The coupling shall be so designed that 0.75 of the coupling retainer circumference shall be sufficient to hold the joint and leakage shall not exceed 0.03 SCFM per
19、inch of diameter at operating pressure of Table 2 at 800 F. SAE INTERNATIONAL AS6369 Page 3 of 20 3.3.2 Flanges The material of the flanges shall be corrosion resistant steel as specified on the applicable AS drawing shown in Table 1. Table 1 - Joint component control numbers Description AS Number V
20、-Band Coupling Standard Latch AS6369/1 Sheet Metal Flange AS6369/2 Solid Flange End Design Standard AS6369/3 3.3.3 Welding Resistance welding shall be in accordance with AWS D17.2/D17.2M. Fusion welding shall be in accordance with AWS D17.1/D17.1M. 3.3.4 Bolt Bolt material shall be as specified on t
21、he applicable AS drawing and comply with AS7479, with a tensile strength of 160 ksi minimum. 3.3.4.1 Bolt Threads Bolt threads shall conform to AS8879, and may be lubricated using an anti-seize or dry film high temperature lubrication. NOTE: Addition of lubrication will reduce the necessary torque v
22、alues by approximately five lb-in and should be verified by the user. 3.3.5 Nut The nut shall be a self-locking type with a running torque of 3.5 to 30 lb-in. The material shall be as specified on the applicable coupling drawing. The nut shall have a minimum life of five complete full on-off cycles
23、when installed within a speed of 60 to 120 rpm on the bolt, or 15 complete full on-off cycles when installed within a speed not to exceed 25 rpm. SAE INTERNATIONAL AS6369 Page 4 of 20 Table 2 - Minimum rated limit load capability Operating (psig) Proof (psig) Burst (psig) Tube OD (inch) Ambient and
24、-65 F 800 F Ambient and -65 F 800 F Ambient and -65 F 800 F 1 422 257 843 514 1265 772 1.25 382 233 763 466 1145 698 1.5 342 208 683 417 1025 625 1.75 302 184 603 368 905 552 2 267 163 533 325 800 488 2.25 237 144 473 289 710 433 2.5 217 132 433 264 650 397 2.75 197 120 393 240 590 360 3 182 111 363
25、 222 545 332 3.5 157 96 313 191 470 287 4 137 83 273 167 410 250 4.5 122 74 243 148 365 223 5 112 68 223 136 335 204 5.5 97 59 193 118 290 177 6 92 56 183 112 275 168 6.5 87 53 173 106 260 159 7 82 50 163 100 245 149 7.5 72 44 143 87 215 131 8 62 38 123 75 185 113 8.5 47 28 93 57 140 85 9 37 22 73 4
26、5 110 67 10 32 19 63 39 95 58 3.3.6 Duct Installation The joint shall be so designed as to permit removal of a single duct section without moving mating ducting axially. Each joint must be manually aligned during assembly. The manually aligned joint shall meet the requirements herein with a total of
27、 0.060 inch transverse mismatch. 3.4 Temperature The joints shall meet the requirements of this specification under any combination of ambient/fluid temperature exposure within the range of -65 F external ambient to 800 F internal fluid. 3.5 Performance The values specified herein shall define the r
28、equirements for satisfactory performance and shall apply to performance under the conditions as specified in 3.4. 3.5.1 Static Leaking The joint, consisting of the coupling and flanges noted in 3.3 shall show no evidence of leakage in excess of 0.01 SCFM (0.000765 lb dry air per minute) per inch of
29、tube diameter when subjected to the requirements specified herein. SAE INTERNATIONAL AS6369 Page 5 of 20 3.5.2 Rated Load Limit (proof) = Two times operating load. Ultimate = Three times operating load (burst load), 3.5.1 may be exceeded. Deformation may occur, but the joint shall remain intact. 3.5
30、.3 Proof Pressure The joint shall show no evidence of deformation or leakage in excess of 0.06 SCFM per inch of tube diameter, when subjected to the proof pressure of Table 2. 3.5.4 Burst Pressure The joint shall not rupture and shall remain intact when subjected to the burst pressure of Table 2, fo
31、r 2 minutes. Deformation shall be allowed. 3.5.5 Torsional Moment The joint shall not permanently deform when subjected to the torsional moment specified in Table 3 operating pressure of Table 2 at 70 F. The joint may rotate to 90, but shall not leak in excess of the rate specified in 3.5.1. Table 3
32、 - Torsional load Tube OD (inch) Torsional Moment lb-in Tube OD Torsional Moment lb-in 1 330 4.5 1500 1.25 415 5 1665 1.5 500 5.5 1835 1.75 585 6 2000 2 665 6.5 2170 2.25 750 7 2330 2.5 830 7.5 2500 2.75 715 8 2670 3 1000 8.5 2840 3.5 1165 9 3010 4 1330 10 3300 3.5.6 Vibration The joint, when pressu
33、rized to operating pressure of Table 2 at ambient temperature shall show no evidence of leakage in excess of that specified in 3.5.1 during or after exposure to vibration levels per 4.5.4 of this specification. There shall be no cracking, or chipping of parts. 3.5.7 Pressure Cycling The joint shall
34、not permanently deform, or show evidence of fatigue failure after being subjected to 144000 operating pressure impulse cycles per Table 2, and 4.5.5, at 800 F. Leakage shall not exceed that specified in 3.5.1. 3.5.8 Combined Load and Combined Load Cycling The joint shall not permanently deform, or s
35、how evidence of fatigue failure, and shall not exceed the leakage requirements of 3.5.1 during and after subjection to combined loads per 4.5.6 and 4.5.6.1 at pressures and temperatures of Table 4, as applicable. SAE INTERNATIONAL AS6369 Page 6 of 20 Table 4 - Combined loads Tube OD (inch) Test Pres
36、sure (Oper at 800 F) psig Combined Load Test Yield Moment at Test Pressure at 800 F in lb-in Combined Load Cycle Bending at 800 F in lb-in 1 257 525 105 1.25 233 650 145 1.5 208 785 205 1.75 184 925 275 2 163 1080 370 2.25 144 1150 405 2.5 132 1405 540 2.75 120 1585 675 3 111 1770 770 3.5 96 2170 10
37、60 4 83 2615 1405 4.5 74 3085 1760 5 68 3590 2155 5.5 59 4135 2675 6 56 4725 3150 6.5 53 5340 3725 7 50 5990 4245 7.5 44 6695 4895 8 38 7425 5635 8.5 28 8065 6290 9 22 8780 7040 10 19 10685 8460 3.5.9 Angular Misalignment The joint shall not show permanent deformation, or evidence of leakage in exce
38、ss of 0.06 SCFM per inch of tube diameter when pressurized at proof pressure of Table 2 at 800 F after being assembled at an angular misalignment as show in Figure 2. 3.5.10 Thermal Shock The joint shall not permanently deform and shall not exceed the leakage requirements of 3.5.1 during and after b
39、eing subjected to a minimum of ten thermal shock cycles of -65 to 800 F at operating pressure of Table 2. 3.5.11 Compressive Load The joint shall not permanently deform when subjected to compressive loads of Table 5. Leakage shall not exceed that specified in 3.5.1. SAE INTERNATIONAL AS6369 Page 7 o
40、f 20 Table 5 - Compressive load Tube OD (inch) Compressive Load (lb) Tube OD (inch) Compressive Load (lb) 1 80 4.5 265 1.25 90 5 290 1.5 112 5.5 335 1.75 119 6 340 2 135 6.5 370 2.25 155 7 392 2.5 165 7.5 420 2.75 180 8 455 3 190 8.5 465 3.5 215 9 480 4 235 10 505 3.6 Interchangeabilty The joint com
41、ponents shall be completely interchangeable and intermateable between suppliers approved by the user such that a mixed assembly will meet the requirements of this specification. 3.7 Part Numbering of Interchangeable Parts All parts having the same manufacturers part number shall be functionally and
42、dimensionally interchangeable. Item identification, part numbers and changes shall be in accordance with ASME Y14.100. 3.8 Identification of Product 3.8.1 Coupling The coupling shall be marked for identification in accordance with MIL-STD-130 and shall include the following as a minimum. AS Number S
43、upplier Part Number Supplier Name or Trademark and CAGE code Date of Manufacture Torque “Caution Torque to (see applicable AS drawing) lb-in” 3.8.2 Flanges The flange packaging shall be marked for identification in accordance with the AS drawing and MIL-STD-130 with the AS part number and the suppli
44、ers identification. 3.9 Workmanship The joint components shall be free from defects and imperfections and manufactured and finished in a thoroughly workmanlike manner. SAE INTERNATIONAL AS6369 Page 8 of 20 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection 4.1.1 Suppliers Responsibili
45、ty The supplier is responsible for the performance and all quality assurance provisions as specified herein. Accurate records of the testing shall be maintained by the supplier and shall be available to the user for inspection on request. The suppliers test data, subject to the approval of the user,
46、 shall be considered adequate for product qualification. Rejected joint components shall not be submitted for reinspection without furnishing full particulars concerning previous rejection and measures taken to overcome the defects. If investigation indicates that the defect causing the rejection ma
47、y exist in joint components previously supplied to the user, the supplier shall advise the user of this condition, method of identifying these parts, and corrective action or disposition of the rejected parts. 4.1.2 Users Responsibility The user shall establish adequate inspection procedures to ensu
48、re that all requirements of this specification are met. Emphasis shall be placed on the following: a. Dimensional Configuration b. Marking c. Size d. Functional Capability 4.2 Classification of Tests Inspection and testing of joint components shall be classified as: a. Qualification Test (4.2.1) b. Quality Conformance Test and Verification (4.2.2) 4.2.1 Qualification Test Qualification Tests specified in Table 6 are intended to qualify a manufacturers parts. The configuration shall be as described on the Coupling and Flange AS standards. The witnessing of qualification tests by the users repr
