《SAE-AS-2094-1995-R2007.pdf》由会员分享，可在线阅读，更多相关《SAE-AS-2094-1995-R2007.pdf（9页珍藏版）》请在三一文库上搜索。
1、AEROSPACE STANDARD AS2094 Issued1995-12 Reaffirmed2007-08 Test Methods for Tube-Fitting Assemblies This document is equivalent to MA2094 (ISO 10583). FOREWORD This document has been prepared to standardize on the test methods for qualification of tube-fitting assemblies used in aircraft fluid system
2、s. Compliance with these test methods is necessary for assemblies which are used in systems where a malfunction could affect the safety of flight. 1.SCOPE: This SAE Aerospace Standard (AS) specifies test methods for fitting assemblies used in aircraft fluid systems in the pressure classes B, D, and
3、E (1500 psi, 3000 psi, and 4000 psi), and in temperature Types I, II, and III (-65 to 160 F, -65 to 275 F, and -65 to 400 F) of AS2001. This document applies each time that it is referred to in a procurement specification or other definition document. Fluids and materials used for the tests are list
4、ed in Section 2. 2.REFERENCES: 2.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. ARP603Impulse Testing of Hydraulic Hose, Tubing and Fitting Assemblies AS1055Fire Resistance, Fire Test and Performance Requirements for Flexible Hose and Rigid Tube Assemblies
5、ARP1185Flexure Testing of Hydraulic Tubing Joints and Fittings AS2001Aerospace Fluid Systems, Pressure and Temperature Classifications MA2004Thermal Shock Testing for Piping and Fittings (ISO 6773) RATIONALE This document has been reaffirmed to comply with the SAE 5-Year Review policy. SAE Technical
6、 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 therefrom, is the so
7、le 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 2007 SAE International All rights reserved. No part of this publication may be reproduce
8、d, 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) Fax: 724-776-0
9、790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 2 -
10、 2.2U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. P-D-680Dry Cleaning Solvent TT-I-735Isopropyl Alcohol TT-S-735Standard Test Fluids, Hydrocarbon MIL-H-5606Hydraulic Fluid, Petroleum Base, Aircraft, Miss
11、ile and Ordnance MIL-T-5624Turbine Fuel, Aviation, Grade JP4, JP5/JP8 ST MIL-L-7808Lubricating Oil, Aircraft Turbine Engine, Synthetic Base MIL-C-81302Cleaning Compound, Solvent, Trichlorotrifluoroethane MIL-H-83282Hydraulic Fluid, Fire Resistant, Synthetic, Hydrocarbon Base, Aircraft MIL-STD-810Env
12、ironmental Test Methods (ISO 7137) 2.3Definitions: AMBIENT TEMPERATURE: Temperature in the test area or test chamber. ROOM TEMPERATURE: Temperature in the test laboratory between 15 and 32 C. 3.QUALITY CONFORMANCE INSPECTION PROCEDURES: Fitting components and assemblies shall be inspected using the
13、normal tools and procedures. 4.QUALIFICATION AND PERFORMANCE TEST PROCEDURES: 4.1Proof Pressure Test: This test is intended to verify the structural integrity of the fitting assembly prior to its use for other tests or in the production of tube or duct assemblies. Connect test assemblies to a source
14、 of pressure with one end free to move. Bleed all air from the system before any pressure is applied. Proof pressure test at a value as specified by the procurement specification for a minimum period of 3 min. The rate of pressure rise for system pressures of 1500 psi and over shall be 20 000 psi 50
15、00 psi per minute. For system pressures under 1500 psi, the rate shall be 4000 psi 1000 psi per minute. The test shall be conducted at ambient temperature. 4.2Pneumatic Pressure Test: This test is intended to verify that the fitting assembly will perform without leakage in pneumatic applications. Th
16、is test is often used at the start and completion of other tests. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 3 - 4.
17、2 (Continued): Solvent clean and air dry test fittings prior to testing. Assemble fittings using a lubricant or compound on the thread and sleeve/nut shoulder (unless they have a solid film lubrication) and tighten to the torques specified in the procurement specification. Pressurize with nitrogen.
18、Maintain the pressure for 3 min while the specimens are immersed in water or suitable oil. Specimens shall be pressure tested at ambient temperature. WARNING: Conduct pneumatic tests in a special device to protect the operator. 4.3Impulse Test: This test is intended to verify the service life of a f
19、itting assembly when exposed to hydraulic pressure cycling or pressure surging. Impulse test the assemblies in accordance with ARP603 Test Type I specimens at ambient temperature and Types II and III at the temperatures and in the sequence specified in ARP603. 4.4Hydrostatic Burst Pressure Test: Thi
20、s test is intended to verify that a specified overpressure safety factor is being met, also to establish the failure mode under overpressure. WARNING: Conduct the test in a special device to protect the operator. Connect the test assembly to a source of pressure with one end free to move. Bleed all
21、air from the system before any pressure is applied. Increase the pressure at a rate of 20 000 psi 5000 psi (1500 bar 375 bar) per minute until the assembly bursts. Specimens shall be tested at ambient temperature. Specimens from impulse or corrosion testing may be used for the burst test. 4.5Flexure
22、 Test: This test is intended to verify the service life of a fitting assembly when exposed to cyclic bending stresses while the assembly is under system pressure. Unless otherwise specified by the purchaser, conduct the test in accordance with ARP1185. Determine the bending stress in the flexure tes
23、t specimen prior to the application of internal pressure. 4.6Stress Corrosion Test: This test is intended to verify that the tube-to-fitting joining process did not adversely affect the resistance to stress corrosion in the joining area. Copyright SAE International Provided by IHS under license with
24、 SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 4 - 4.6 (Continued): Install the test assembly in a test apparatus (see Figure 1) which imposes a bending stress level equal to (85% 5
25、%) of the specified tubing yield strength (0.2% proof stress) minimum at the tubing/ fitting assembly interface. Apply an internal pressure equal to the nominal system pressure without removing the bending stress. Then subject the assembly to test procedure MIL-STD-810 (salt spray test). After expos
26、ure, subject the assembly to the burst pressure test at ambient temperature. Clean, section, and metallurgically examine the tube/fitting joint for intergranular or stress corrosion cracking. FIGURE 1 - Schematic Diagram of Stress Corrosion Test Assembly 4.7Reuse Capability: 4.7.1Port Connections: T
27、his test is intended to verify that port connections can be repeatedly assembled and disassembled during installation and in service. Screw together and unscrew specimens eight times. Each of the eight cycles shall include the complete removal of the fitting from the port and of the tube ends from t
28、he fitting. Install new elastomeric port seals, unless the reuse of seals is specified. Following the first, fourth, and eighth installations, conduct further proof tests. Specimens shall pass pneumatic pressure testing after the eighth installation. The specimens may be used for subsequent impulse
29、and burst tests. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 5 - 4.7.1 (Continued): NOTE: It is not necessary to per
30、form this test on semipermanent port connections. 4.7.2Tube Fittings: This test is intended to verify that fitting components can be repeatedly assembled and disassembled in service. Test the tube fittings to the tightening torques specified in the procurement specification, one half of the fitting
31、connections using the minimum, the other half using the maximum tightening nut torques. Do not mix the two groups. Following the first, fourth, and eighth installations, conduct proof tests. Specimens shall pass gaseous pressure testing after the eighth installation. The specimens may be used for su
32、bsequent impulse and burst tests. 4.8Tensile Test: This test is intended to verify that the fitting assembly may be exposed to axial loads in service. Mount assembled specimens in a tensile machine and strain to rupture at a speed of .15 in/min .04 in/min. Fittings may be tensile tested while system
33、 pressure is maintained in the specimen, using adequate safety precautions. 4.9Thermal Shock Test: This test is intended to verify that the fitting or coupling assembly will not leak if the temperature of the fluid flowing through the fitting or coupling changes between extremes, as can occur, for e
34、xample, in certain fuel system applications. Mount and test the test assemblies in accordance with MA2004. 4.10 Fire Test: This test is intended to verify that the fitting assembly will not leak if exposed to an intense fire. Mount and test the assembly in accordance with AS1055 or the purchasers in
35、structions. 5.TEST SPECIMENS AND TEST FLUID: 5.1Test Specimens: Unless otherwise specified by the buyer, the tube specimens shall be as illustrated in Figure 2. Specimen lengths for the various tests shall be as shown in Table 1. Copyright SAE International Provided by IHS under license with SAELice
36、nsee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 6 - FIGURE 2 - Testing and Test Samples Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/59139770
37、01 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 7 - FIGURE 2 (CONTINUED) Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo re
38、production or networking permitted without license from IHS -,-,- SAE AS2094 - 8 - TABLE 1 - Test Specimens, Free Tube Length Between Sleeves 5.2Test Fluid: Unless otherwise specified, tests shall be conducted using a petroleum base or synthetic hydraulic fluid for Types I and II and a silicate este
39、r base hydraulic fluid for Type III system fittings (see AS2001). Water may be used, whenever practical, for proof, burst, stress corrosion, and repeated assembly (reuse) testing. Air or nitrogen shall be used for the pneumatic tests. Leakage and proof tests for pneumatic system applications shall b
40、e conducted with air or nitrogen. Test fluids shall be in accordance with the following specifications: a.TT-S-735 b.MIL-H-5606 c.MIL-T-5624 d.MIL-L-7808 e.MIL-H-83282 f.AS1241 5.3Cleaning Fluids: Cleaning fluids shall be in accordance with the following specifications: a.PP-D-680 b.TT-I-735 c.MIL-C
41、-81302 Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AS2094 - 9 - 5.4Test Temperature: Tests shall be conducted at room tempera
42、ture, unless otherwise specified. PREPARED BY SAE SUBCOMMITTEE G-3B, AEROSPACE FITTINGS OF COMMITTEE G-3, AEROSPACE COUPLINGS, FITTINGS, HOSE & TUBING ASSEMBLIES Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:37:33 MSTNo reproduction or networking permitted without license from IHS -,-,-