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 2015 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:/www.sae.org/technical/standards/AS85449A AEROSPACE STANDARD AS85449 REV. A Issued 2003-08 Revised 2008-03 Reaffir
5、med 2015-07 Superseding AS85449 Clamp Assembly, Saddle Type, Cushioned, General Specification For RATIONALE AS85449A has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE 1.1 Application This SAE Aerospace Standard (AS) defines the requirements for saddle-type clamps. Tests an
6、d criteria noted do not indicate any specific areas of application or usage. Supplemental testing may be necessary to determine suitability for specific environments and applications. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent specifi
7、ed 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 references cited herein, the text of this document takes precedence.
8、Nothing in this document, however, supersedes applicable laws and regulations unless a specific 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 and Canada) or 724-776-4970 (outside
9、USA), www.sae.org. AMS2700 Passivation of Corrosion Resistant Steels AMS3224 Nitrile-Butadiene Rubber Fuel, Fire, and Ozone Resistant 65-75 AMS3253 Ethylene Propylene Rubber Phosphate Ester Resistant 65-75 AMS3310 Rubber, Silicone Flame Retardant, Low Smoke Density, High Strength 65-75 Durometer Col
10、or White AMS3316 Silicone Rubber, Fiberglass Fabric Reinforced SAE INTERNATIONAL AS85449A Page 2 of 12 AMS3652 Polytetrafluoroethylene (PTFE) Film Non-Critical Grade AMS5510 Steel, Corrosion and Heat-Resistant, Sheet, Strip and Plate 18Cr - 10.5Ni - 0.40Ti (SAE 30321) Solution Heat Treated AS478 Ide
11、ntification Marking Methods AS5763 Clamp Assembly, Saddle Type, Cushioned, Fuel and Petroleum Based Hydraulic Fluid AS7003 Nadcap Program Requirements AS7112/3 Nadcap Requirements for Coupling and Formed Sheet Metal Components AS85449/1 Clamp Assembly, Saddle Type, Cushioned, Fuel and Petroleum Base
12、d Hydraulic Fluid AS85449/2 Clamp Assembly, Saddle Type, Cushioned, Phosphate Ester Fluid Resistant AS85449/3 Clamp Assembly, Saddle Type, Cushioned, High Temperature AS85449/4 Clamp Assembly, Saddle Type, Cushioned, PTFE AS85449/5 Clamp Assembly, Saddle Type, Cushioned, Fire Resistance, Low Smoke D
13、ensity and Toxicity 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM A 686 Tool Steel, Carbon and Carbon-Vanadium ASTM D 624 Test Resistance of Vulcanized Rubber, Test for ASTM D 1
14、149 Rubber Deterioration Surface Ozone Cracking in a Chamber, Test For ASTM D 3182 Rubber Materials Equipment and Procedures for Mixing Standard Components and Preparing Standard Vulcanized Sheets ASTM D 3951 Standard Practice for Commercial Packaging 2.1.3 PRI Publications Available from Performanc
15、e Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD2001 Qualified Product Management Council Procedures for Qualified Products Group PD2101 Aerospace Quality Assurance, Product Standard, Qualification Procedures, Fluid Systems SAE INTERNATIO
16、NAL AS85449A Page 3 of 12 2.1.4 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ASME Y14.5M Dimensioning and Tolerances ANSI/ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes 2.1
17、.5 NAS Publications Available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209,-3928, Tel: 703-358-1000, www.aia-aerospace.org. NAS1149 Washer, Flat 2.1.6 Department of Defense Publications Available from Standardization Document Order Desk, 700 Robbins A
18、venue, Building 4D, Philadelphia, PA 19111-5094, http:/assist.daps.dla.mil/quicksearch/. MIL-STD-1916 Department of Defense Test Method Standard 3. TECHNICA L REQUIREMENTS 3.1 Standard Sheets The individual item requirements shall be as specified herein and in accordance with the applicable specific
19、ation sheets. In the event of conflict between the requirements of this specification and the standard sheet, the requirements of the standard sheet shall govern. 3.2 Qualification Clamps supplied in accordance with this document shall be representative of products which have been subjected to and w
20、hich have successfully passed the qualification tests specified in this standard. 3.2.1 Manufacturer Qualification A manufacturer producing a product in conformance to this procurement specification will be accredited in accordance with the requirements of PD2101, AS7003 and AS7112/3, and shall be l
21、isted in a Performance Review Institute (PRI) Qualified Manufacturers List (QML). 3.2.2 Product Qualification All products shall conform to the requirements of this procurement specification and shall be approved in accordance with the requirements of PD2001 and PD2101 for listing in a PRI Qualified
22、 Products List (QPL). 3.3 Materials Clamp band material and cushioning material shall be as specified on the applicable standard sheet. 3.4 Design and Construction The design and construction of the clamp shall be as specified herein and in accordance with the applicable standard sheets. SAE INTERNA
23、TIONAL AS85449A Page 4 of 12 3.4.1 Dimensions and Tolerances Dimensions and tolerances shall be as specified on the applicable standard sheet. 3.5 Performance Clamp cushions, clamp bands and clamp assemblies shall perform satisfactorily when subjected to the applicable tests specified in this specif
24、ication, and the applicable standard sheets. 3.5.1 Clamp Cushion Performance 3.5.1.1 Physical Properties When tested in accordance with 4.5.3.1, cushion material must meet the physical property requirements specified in the applicable cushion material specification. 3.5.1.2 Compression Set The avera
25、ge compression set value of three cushion material specimens shall not exceed the value specified in the applicable cushion material specification (see 4.5.3.2). 3.5.1.3 Flammability The cushion material shall be tested for flammability in accordance with the applicable cushion material specificatio
26、n sheet and as specified herein (see 4.5.3.3). 3.5.1.4 Titanium Compatibility When tested in accordance with 4.5.3.4, there shall be no evidence of cracking or pitting of the titanium tubing when observed with a 5 to 10 power magnifying glass. 3.5.2 Clamp Assembly Performance 3.5.2.1 Vibration When
27、tested in accordance with 4.5.4.1, no clamp shall exhibit any evidence of cushion separation or other deterioration. There shall be no cracking or separation of metal components. The transmissibility ratio shall be recorded. 3.5.2.2 Ozone Resistance (When specified on applicable material specificati
28、on sheet.) When tested in accordance with 4.5.4.2, no clamp shall exhibit any evidence of cracking visible to the unaided eye, or distortion of the cushion material. 3.5.2.3 Thermal Shock When tested in accordance with 4.5.4.3, the clamps shall exhibit no evidence of cracking, tackiness or degradati
29、on of the cushion material. 3.6 Surface Texture All surfaces shall have a smooth finish and be free from burrs and sharp edges. The inside edges of the clamp band shall be rolled or provided with a radius to eliminate sharp edges. SAE INTERNATIONAL AS85449A Page 5 of 12 3.7 Identification of Product
30、 3.7.1 Identification of Clamps All clamps shall be marked as specified on the applicable standard sheet for the clamps being procured. 3.7.2 Part Numbering and Drawing Numbering The manufacturers basic part number and drawing number shall be the same. 3.8 Workmanship Workmanship shall be of a suffi
31、ciently high grade to ensure that clamps are of uniform quality and free from burrs, slivers, sharp edges, or other defects which would affect their service, and shall be uniform in appearance without any mold flash. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Unless otherwise
32、specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract, the supplier may utilize his own facilities or any commercial laboratory acceptable to the procuring activit
33、y. The procuring activity reserves the right to perform any of the inspections set forth in the specification, where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Classification of Inspections The examination and testing of clamps shall
34、 be classified as: a. Qualification inspections (see 4.3) b. Quality conformance inspections (see 4.4) 4.3 Qualification Inspections 4.3.1 Qualification Test Samples Test samples for qualification tests shall consist of the following number clamps of each standard sheet to be qualified. Size -10 -12
35、 -16 -20 -24 -28 -32 -36 -48 Quantity 17 12 22 12 12 6 6 6 11 In addition, 18 clamp cushion material slabs conforming to ASTM D 3182 for each type cushion material to be tested shall be provided. Fabric reinforced cushion materials for qualification must be supplied both with and without the fabric
36、reinforcement molded into the slabs (18 slabs of each). The weave direction of the fabric reinforcement shall be identified. SAE INTERNATIONAL AS85449A Page 6 of 12 4.3.2 Inspection Routine Sample units shall be subjected to the qualification inspection specified in Table 1 in the order specified, c
37、onducted on applicable specimens. TABLE 1 - QUALIFICATION TESTS TABLE 1A - CLAMP CUSHION Examination or Test Requirement Test Number of Samples Physical Properties 3.5.1.1 4.5.3.1 (See 4.3.1) Compression Set 3.5.1.2 4.5.3.2 (See 4.3.1) Flammability 3.5.1.3 4.5.3.3 (See 4.3.1) Titanium Compatibility
38、3.5.1.4 4.5.3.4 (See 4.3.1) TABLE 1B - CLAMP ASSEMBLY Examination or Test Requirement Test Number of Samples Examination of Product 3.4 4.5.2 58 Vibration 3.5.2.1 4.5.4.1 - Ozone Resistance13.5.2.2 4.5.4.2 5 (See 4.3.1) Thermal Shock 3.5.2.3 4.5.4.3 5 (See 4.3.1) 1When specified on applicable materi
39、al specification sheet 4.3.3 Retention of Qualification To retain qualification the manufacturer shall meet the requirements specified in 3.2.1 and 3.2.2. 4.3.4 Identification of Test Samples Sample for each dash number shall be separately packaged and forwarded to the test facility specified by the
40、 qualifying activity. Samples shall be plainly identified by securely attached durable tags marked with the following information: a. Sample for Qualification Test b. Specification AS85449 c. Clamp Assembly, Saddle-Type, Cushion d. Standard Sheet Part Number e. Manufacturers Part Number f. Name of M
41、anufacturer/Manufacturers CAGE CODE g. Submitted (Date) Under Authorization (Reference Letter Authorizing the Test) 4.3.5 Test Report The supplier shall furnish the agency responsible for qualification with a certified test report showing quantitative results for tests required by this specification
42、. The report shall designate the specification sheet part number of the clamps submitted. The report shall also include the manufacturers drawing specifying the dimensions of the clamp, and the manufacturer of the cushion material. SAE INTERNATIONAL AS85449A Page 7 of 12 4.4 Quality Conformance Insp
43、ections Quality conformance inspections shall consist of the tests and inspections specified in Table 2, conducted in accordance with 4.4.2. TABLE 2 - QUALITY CONFORMANCE TESTS Examination or Test Requirement Test Inspection Level AQL Examination of Product 3.4 4.5.2 II 4.0% Cushion Tensile 3.5.1.1
44、4.5.3.1 S-3 4.0% Cushion Elongation 3.5.1.1 4.5.3.1 S-3 4.0% Ozone Resistance13.5.2.2 4.5.4.2 S-3 4.0% 1This test may be waived by procuring activity (see 6.2d) 4.4.1 Inspection Lot An inspection lot shall consist of clamps for a particular size, and material produced under essentially the same manu
45、facturing conditions and presented for inspection at the same time. 4.4.2 Sampling for Nondestructive Tests A random sample shall be selected from each inspection lot in accordance with general inspection levels of ANSI/ASQ Z1.4, inspection level II with Acceptance Quality Level AQL of 4.0%, and acc
46、eptance number zero (see Table 2). A preventative based quality system may be used in lieu of sampling inspection in accordance with MIL-STD-1916. 4.4.3 Sampling for Destructive Tests Sampling shall be performed in accordance with special inspection levels of ANSI/ASQ Z1.4, Single Sampling Plan, Ins
47、pection Level S-3 with Acceptance Quality Level AQL of 4% and acceptance number zero (see Table 2). A preventative based quality system may be used in lieu of sampling inspection in accordance with MIL-STD-1916. Cushion material test specimens shall be cut from clamp cushions and shall be of suffici
48、ent size to be tested in accordance with the applicable test methods of the applicable material specification sheet. Tensile and elongation cushion material test specimens may be cut from larger size clamp cushions of the same inspection lot, and shall be provided by the manufacturer. 4.5 Test Metho
49、ds 4.5.1 Test Conditions 4.5.1.1 Environment Unless otherwise specified, all testing shall be performed at room temperature (60 to 90 F). 4.5.1.2 Tolerances Unless otherwise specified, test temperature tolerance shall be 5 F and test time tolerance shall be 1% of the total test time. 4.5.2 Examination of Product Clamps shall be examined to determine compliance with the requirements of this specification and applicable
