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 theref
2、rom, 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 pub
3、lication 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: +1 724-776-4970
4、(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/AS1960AEROSPACESTANDARDAS1960Issued 1986-06 Reaffirmed 2013-01 Coupling Assembly, V-
5、Band, Sheet Metal Flange, Pneumatic Tube RATIONALEAS1960 has been reaffirmed to comply with the SAE five-year review policy. SAE AS1960 Page 2 of 23 2.2 Standards: 2.2.1 Military: DOD-STD-1 00 MIL-STD-129 MIL-STD-130 MIL-STD-81 0 MIL-STD-831 3. REQUIREMENTS: 3.1 Qualification: Engineering Drawing Pr
6、actices Marking for Shipment and Storage Identification Marking of U.S. Military Property Military Standard Environmental Test Methods Test Reports, Preparation of The joint furnished under this specification shall be a product identical to specimens which have successfully passed the tests specifie
7、d in Section 4 of this specification. 3.2 Materials: The joint component materials shall be uniform in quality, free from defects, suitable for service, consistent with good manufacturing practices, and in conformance with the applicable specifications and requirements stated herein. Specific materi
8、als used in the joint components shall be specified on the applicable AS standard drawing. 3.2.1 Duct Material: Duct materials will be stainless steel and titanium. The coupling joint shall meet the requirements herein when assembled on stainless or titanium flanges. 3.2.2 Equipment Flanges: Equipme
9、nt flange materials may be stainless steel, titanium or aluminum. The flange may be solid, machined, forged or cast shape. For an aluminum flange joint, the maximum temperature is +260 oF. 3.3 Design and Construction: The joint consisting of coupling and flanges listed in Table 1 shall fulfill all d
10、esign and performance requirements of this specification. 3.3.1 Coupling: The material of the coupling shall be corrosion resistant alloy as specified on the applicable AS drawing noted in Table 1 . 3.3.1.1 Coupling Retainer Strength: The coupling shall maintain joint integrity at operating pressure
11、 in the event of coupling retainer failure. The coupling shall be so designed that 3/4 of the coupling retainer circumference shall be sufficient to hold the joint and leakage shall not exceed 0.03 SCFM per inch of diameter at operating pressure of Table 2 at 800 oF. SAE AS1960 Page 3 of 23 3.3.2 Fl
12、anges: The material of the flanges shall be corrosion resistant alloy as specified on the applicable AS drawing shown in Table 1. TABLE 1- Joint Component Control Numbers Description AS Number V -Band Coupling AS1960/1 Standard Latch V-Band Coupling AS1960/2 Quick Release Latch Sheet Metal Flanqe AS
13、1960/3 Solid Flange End AS1960/4 Design Standard 3.3.3 Welding: Resistance or fusion welding shall be in accordance with MIL-W-6858 or MIL-W-8611. 3.3.4 Bolt: Bolt material shall be as specified on the applicable AS drawing, with an ultimate tensile strength of 160,000 psi. 3.3.4. 1 Bolt Threads: Bo
14、lt threads shall conform to MIL-S-8879, and may be lubricated using an anti-sieze high temperature lube. 3.3.5 Nut: The nut shall be a self locking type with a running torque of 1.8 to 30 inch lbs. The material shall be as specified on the applicable coupling drawing. The nut shall have a minimum li
15、fe of ten ( 1 0) complete full on-off cycles without damage to the bolt or nut or threads when installed within 120 rpm on the bolt. 3.3.6 Safety Latch: The safety latch, when specified shall be a permanent part of the coupling and shall engage and maintain joint integrity in the event of primary bo
16、lt failure. Joint leakage shall not be in excess of 0.03 (SCFM) per inch of diameter at operating pressure of Table 2 while being supported only by the safety latch (failed bolt case). The safety latch shall not require any tools for its operation or release. The safety latch shall be automatically
17、positioned when the clamp is installed, and must be designed so that failure of the primary bolt is clearly evident on visual inspection. 3.3. 7 Duct Installation: The coupling joint shall be so designed as to permit removal of a single duct section without moving mating ducting axially. Each joint
18、must be self aligning during assembly. The self aligned joint may have a total of .06 transverse mismatch and must meet the requirements herein. SAE AS1960 Page 4 of 23 “N“ LBS/INCH (Limit Roam Temp. Tube 00 65 Of BOO F 1.00 589 393 1.25 501 334 1.50 437 293 1.75 391 261 2.00 355 237 2.25 326 219 2.
19、50 303 203 2.75 283 190 3.00 267 179 3.50 241 162 4.00 221 149 4.50 206 139 5.00 193 131 5.50 183 123 6.00 175 118 6.50 167 113 7.00 161 109 7.50 155 105 8.00 150 102 8.50 146 199 9.00 142 197 Pressure PSIG (with no bending moment applied Normal Ooeratina Proof Burst 70 F ! OJ r m tv :J 3 c 3 :0 s.
20、c. 3 r 0 Q) 0 0 Q) “0 Q) cr SAE AS1960 Page 5 of 23 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 oF to +800 F. 3.5 Performance: The values specified herein shall define the requiremen
21、ts for satisfactory performance and shall apply to performance under the conditions as specified in 3.4. 3.5.1 Static Leakage: The joint, consisting of the coupling and flanges noted in 3.3. shall show no evidence of leakage in excess of 0.01 SCFM (.0007651bs. dry air per minute) per inch of diamete
22、r when subjected to the requirements specified herein. 3.5.2 Rated Limit and Ultimate Load: The coupling joint shall be capable of carrying the total limit load “N“ as a minimum, see Figure 1, specified in Table 2 without deformation or exceeding the leakage requirement of 3.5.1 with respect to the
23、following relationship: Where: Np = Load - Pounds per inch of circumference due to pressure. Nb = Load - Pounds per inch of circumference due to bending. Na = Load- Pounds per inch of circumference due to axial loading. 3.5.2.1 Pressure: The rated load per inch of circumference due to pressure shall
24、 be determined from the following relationship: Where: Np =PO 4 Np = Load- pounds per inch of circumference due to pressure P = Pressure in psi D = Flange outside diameter in inches SAE AS1960 Page 6 of 23 3.5.2.2 Bending: The rated load per inch of circumference due to bending shall be determined f
25、rom the following relationship: Where: Nb = Load pounds per inch of circumference due to bending (limit) M = Bending moment in inch pounds. D = Flange outside diameter in inches. 3.5.2.3 Axial Load: The rated load per inch of circumference due to axial loading shall be determined from the following
26、relationship: Where: N = a D Na = is in pounds per inch due to axial load E =Axial tension load in pounds. D = Flange outside diameter in inches. 3.5.2.4 Rated Load: Limit= 2.0 Times operating load (proof load) Ultimate = 3 Times operating load (burst load) 3.5.1 may be exceeded. Deformation may occ
27、ur but the joint shall remain permanently connected. 3.5.3 Proof Pressure: The joint shall show no evidence of deformation or leakage in excess of 3.5.1, 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 b
28、urst pressure of Table 2 for 2 minutes. Deformation shall be allowed. 3.5.5 Torsional Moment: The joint shall not rotate or deform when subjected to the torsional moment specified in Table 3 at operating pressure of Table 2 at 70 oF. The joint may rotate to 90 but shall not leak in excess of the rat
29、e specified in 3.5.1. SAE AS1960 Page 7 of 23 TABLE 3- Torsional Load TUBE TORSIONAL MOMENT TUBE TORSIONAL MOMENT 00 INCH LBS OD INCH LBS 1.00 333 4.00 1330 1.25 415 4.50 1500 1.50 500 5.00 1665 1.75 585 5.50 1835 2.00 665 6.00 2000 2.25 750 6.59 2170 2.50 830 7.00 2330 2.75 915 7.50 2500 3.00 1000
30、8.00 2670 3.50 1165 8.50 2830 9.00 3000 3.5.6 Vibration: The joint, when pressurized to operating pressure of Table 2 at 70 oF shall show no evidence of leakage in excess of that specified in 3.5.1 during or after exposure to vibration levels per applicable portions of MIL-STD-810, Procedure I and p
31、aragraph 4.5.4 of this specification. There shall be no cracking, or chipping of parts. 3. 5. 7 Pressure Cycling: The joint shall not permanently deform, or show evidence of fatigue failure after being subjected to 144,000 operating pressure impulse cycles per Table 2 and 4.5.5, at 800 oF. Leakage s
32、hall not exceed that specified in 3.5.1. 3.5.8 Combined Load directly opposite the contacting side, a gap shall be measured between the flanges equivalent to 0.015 inch displacement. After the proper gap has been established one of the holding fixtures may be loosened to permit axial movement yet ma
33、intaining the displacement. The coupling shall then be installed on the flanges and tightened to the specified torque. The joint shall not be tapped or hammered to aid in seating the coupling. After assembly, the test joint shall be pressurized to proof pressure specified in Table 2 at elevated temp
34、erature. A leakage test shall be conducted at the elevated temperature and pressure and recorded. 4.5.8 Thermal Shock: The test assembly shall meet the requirements of 3.5.1 0 when subjected to 10 cycles of thermal shock. The test joint shall be rigidly supported at one end with the other end unrest
35、rained. The test assembly shall have attached to it, associated equipment necessary to measure leakage through the test assembly, and maintain the desired internal pressure and temperature (see Figure 4). The assembly shall then be placed in a chamber. The ambient air temperature in the test chamber
36、 shall be -65 F. The internal pressure shall be normal operating pressure of Table 2. The internal temperature shall be -65 oF as a result of cold soaking at least one hour. At the end of one hour a joint leakage test shall be made. After completion of the leakage test, the test assembly internal te
37、mperature shall be raised as quickly as possible to 800 oF and stabilized while adjusting the internal pressure as specified in Table 2. A leakage test shall be conducted at the elevated temperature when the assembly temperature has stabilized. SAE AS1960 Page 15 of 23 4.5.9 Compressive Load: The fu
38、lly mated test assembly shall be subjected to 10 compressive load cycles specified in Table 5. The load shall be at a rate not to exceed 100 pounds per second on the unpressurized test assembly at 800 F. The compressive load shall be applied and held for one minute. At the conclusion, the load shall
39、 be relaxed and the assembly shall be pressurized to a operating pressure of Table 2 at 800 F, a leakage test shall be made at that pressure. This shall constitute one cycle. The test assembly shall meet the requirements of 3.5.11 during and after this test. 4.5.1 0 Retainer Strength Test: The retai
40、ner shall be cut along one leg for a distance of 1/4 circumference or one complete segment may be cut on coupling containing four (4) equal segments. The coupling shall then be installed and subjected to normal operating pressure at 70 oF. The joint shall meet the requirements of 3.3.1 .1. 4.5.11 Sa
41、fety Latch Cycling: The coupling joint shall be engaged using the T -Bolt or a device simulating the T-Bolt. The coupling shall be rigged to the full torque condition. The joint shall then be pressurized at normal operating pressure of the Table 2 at 70 F. While in the fully torqued condition, the b
42、olt shall be severed or a latch action duplicating bolt severing. This shall constitute one cycle. The procedure shall be repeated for a total of 20 cycles. The joint shall meet the requirements of 3.3.6. 4.5.12 Nut Life: The coupling shall be installed on a mandrel and torqued to the specified torq
43、ue on the coupling as standard. The nut shall then be cycled off and on 10 times. Any interference, binding, galling, misalignment, permanent set, dimensional discrepancies or excessive nut running torque, shall be noted in the test report. 4.5.13 Disassembly and Inspection: Upon completion of the t
44、ests, the coupling shall be disassembled and each part and each tubing or fitting end carefully examined for any permanent deformation. Any permament deformation of any part not previously specified shall be so noted in the test report. 5. PREPARATION FOR DELIVERY: 5.1 Packaging: Packaging shall be
45、as necessary to assure delivery of components in a clean and undamaged condition. 5.2 Marking of Containers: Interior and exterior containers shall be marked in accordance with MIL-STD-129. The date of packaging shall be marked on all containers. PREPARED BY SAE SUBCOMMITTEE G-3A, COUPLINGS OF COMMI
46、TTEE G-3, AEROSPACE FITTINGS, HOSE, AND TUBING ASSEMBLIES SAE AS1960 Page 16 of 23 D Dia FIGURE 1 FIGURE 2- Angular Misalignment Coupling omitted or clarity SAE AS1960 Page 17 of 23 _, upling Co Nomin al Diameter v 075 R +. 010 _/ -FIGURE 3- Nominal Diameter Mandrel .195 .190 SAE AS1960 Page 18 of 2
47、3 Valve Temperature Controller Unit Pressure Gage Test Joint Temp Controller Internal Heater FIGURE 4 - Suggested Schematic Diagram of static Pressure Test Set-Up SAE AS1960 Page 19 of 23 Ab v.a . AIDWN& 1 ClaaiaMr -t I 1 I -FIGURE 5- Suggested Schematic Diagram of Combined Load Cycle Test Set-Up SA
48、E AS1960 Page 20 of 23 Actuator Fixed to Test Cell Free to Rotate Torsion Applied Aa Shown FIGURE 6- Suggested Schematic Diagram of Torsion Test Set-Up SAE AS1960 Page 21 of 23 Fixed to Table Test Joint Fixed to Table L_ D Vibration Table Link Shaker Directions of -c:._ Induced Vibration X-Axis FIGURE 7 - Vibration Diagram SAE AS1960 Page 22 of 23 .10 :r 0 -z -ltJ .01 _c - 1- . -_ _. -2 e COAtroller UAit Preuve Gale Pre11ure Reawator Chamber Ambf.eot Temperat11re - I I I I I I L_ _ _ FIGURE 8- Suggested Schematic Diagram of Pressure Cycle Test Set-Up
