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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication ma
3、y 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.orgAS85052A AEROSPACESTANDARDIssued 2001-03 Reaffirmed 2007-01 Revised 2008-07 Superseding AS85052 (R) Clamp Assembly, Loop Type, Cushioned, General Specification For RATIONALEThis clamp standard is revised to incorporate
5、 the latest SAE material specification and standards. 1. SCOPE 1.1 Application This SAE Aerospace Standard (AS) defines the requirements for loop type clamps primarily intended for general clamping of tubing for aircraft hydraulic systems. 2. REFERENCES 2.1 Applicable Documents The following publica
6、tions form a part of this 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 references ci
7、ted herein, the text of this document takes precedence. 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: 877-60
8、6-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AS478 Identification Marking Methods ARP1527 Color Coding - Elastomers for Tube Clamp Cushions AS7003 Nadcap Program Requirements AS7112/3 Nadcap Audit Criteria for Coupling and Formed Sheet Metal Components AS85052/1 Clamp, L
9、oop, Tube 17-7 PH CRES, 275 F, Fuel and Petroleum Based Hydraulic Fluid Resistant AS85052/2Clamp, Loop, Tube 17-7 PH CRES, 275 F, Phosphate Ester Fluid Resistant Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license fr
10、om IHS-,-,-SAE AS85052A - 2 -AS85052/3 Clamp, Loop, Tube 17-7 PH CRES, 500 F AS85052/4 Clamp Support, Loop Clamp AMS3224 Nitrile-Butadiene Rubber Fuel, Fire, and Ozone Resistant 65-75 AMS3253 Ethylene Propylene Rubber Phosphate Ester Resistant 65-75AMS3316 Silicone Rubber, Fiberglass Fabric Reinforc
11、ed AMS4944 Titanium Alloy Tubing, Seamless, Hydraulic, 3.0Al - 2.5V Cold Worked, Stress Relieved AMS4945 Titanium Alloy Tubing, Seamless, Hydraulic 3Al - 2.5V, Controlled Contractile Strain Ratio, Cold Worked, Stress Relieved AMS4946 Titanium Alloy Tubing, Seamless, Hydraulic 3Al - 2.5V, Texture Con
12、trolled, Cold Worked, Stress Relieved AMS2700 Passivation of Corrosion Resistant Steels 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM A 582/A582M Standard Specification for Free-Machin
13、ing Stainless Steel Bars ASTM D1149 Rubber Deterioration - Surface Ozone Cracking in a Chamber ASTM D 3182 Rubber Material Equipment and Procedure for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets ASTM D 412 Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D 3951 St
14、andard Practice for Commercial Packaging ASTM E 18 Standard Test Method for Rockwell Hardness of Metallic Materials ASTM G154 Standard Practice for Operating Florescent Light Apparatus for UV Exposure of Nonmetallic Materials2.1.3 PRI Publications Available from Performance Review Institute, 161 Tho
15、rn 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 Copyright SAE International Provided by IH
16、S under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS85052A - 3 -2.1.4 ASME Publications Available from American Society of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.org.ASME Y1
17、4.5M Dimensioning and Tolerancing 2.1.5 Department of Defense Specifications 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/quicksearch/.MIL-STD-1916 DOD Preferred Metho
18、ds for Acceptance of Product MIL-PRF-83282 Hydraulic Fluid Fire Resistant, Synthetic Hydrocarbon Base, Metric NATO Code Number H-537 2.1.6 ASQ Publications Available from American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203, Tel: 800-248-1946 (United States or Canada) or +1
19、-414-272-8575 (International), www.asq.org.ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes 3. TECHNICAL REQUIREMENTS 3.1 Standard Sheets The individual item requirements shall be as specified herein and in accordance with the applicable standard sheets. In the event of any confl
20、ict between the requirements of this standard 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 which have successfully passed the qualif
21、ication tests specified in this standard.3.2.1 Manufacturer Qualification A manufacturer producing a product in conformance to this procurement specification shall be accredited in accordance with the requirements of PD2101, AS7003 and AC7112/3, and shall be listed in a Performance Review Institute
22、(PRI) Qualified Manufacturers List (QML).3.2.2 Product QualificationAll 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 Products List (QPL) PRI-QPL-AS85052. See
23、 for current QPL on-line. 3.3 Materials Clamp band material and cushioning material shall be as specified on the applicable standard sheet. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS85052
24、A - 4 -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.3.4.1 Dimensions and Tolerances Dimensions and tolerances shall be as specified on the applicable standard sheet. 3.5 Performance Clamp cushi
25、ons, clamp bands and clamp assemblies shall conform to the requirements of this specification and the applicable standard sheet when subjected to the applicable tests specified in this specification and the applicable standard sheets. 3.5.1 Clamp Cushion Performance 3.5.1.1 Physical Properties When
26、tested in accordance with 4.5.3.1, cushion material must meet the physical property requirements specified in the applicable material specification. 3.5.1.2 Compression Set The average compression set value of three cushion material specimens shall not exceed the value specified in the applicable cu
27、shion 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 specification 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
28、shall be no evidence of cracking or pitting of the titanium tubing when observed with a 5 to 10 power magnifying glass. 3.5.1.5 Color Coding The cushion material shall be color coded in accordance with ARP1527 as specified on the applicable cushion material specification.3.5.2 Clamp Band Performance
29、 3.5.2.1 Clamp Band Hardness When tested in accordance with 4.4.4, clamp band hardness shall be 51-59 hardness reading (HR) Rockwell Superficial Scale, 30N. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IH
30、S-,-,-SAE AS85052A - 5 -3.5.3 Clamp Assembly Performance 3.5.3.1 Diametral Retention Each clamp sample shall be tested in accordance with diametral retention test (see 4.5.4.1) both before and after being subjected to the vibration test (see 4.5.4.2). When tested in accordance with 4.5.4.1, each cla
31、mp shall withstand an axial mandrel force as specified below: Clamp Band Thickness (Inch) Axial Force (lb) 0.020 15 - 45 0.032 25 - 55 0.040 35 - 65 3.5.3.2 Vibration and Transmissibility When tested in accordance with 4.5.4.2, no clamp shall exhibit any evidence of cushion separation or other deter
32、ioration. There shall be no cracking or separation of metal components. The transmissibility ratio shall be recorded. 3.5.3.3 Ozone Resistance (AS85052/1) When tested in accordance with 4.5.4.3, the clamps shall not exhibit any evidence of cracking on the outside circumference of the cushion visible
33、 to the unaided eye. Cracks in cushion material pinched between the metal band feet shall not cause the test to be considered a failure. 3.5.3.4 Thermal Shock When tested in accordance with 4.5.4.4, the clamps shall not exhibit evidence of cracking, tackiness, or degradation of the cushion material.
34、 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. 3.7 Identification of Product 3.7.1 Identification of Clamps All clamps shall be marked as speci
35、fied on the applicable standard sheet. 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 sufficiently high grade to insure that clamps are of uniform quality and free from burrs, slivers, sha
36、rp edges, or other defects which would affect their service, and shall be uniform in appearance without any mold flash.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS85052A - 6 -4. QUALITY ASS
37、URANCE PROVISIONS 4.1 Responsibility for Inspection Unless otherwise 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, the supplier may utilize his own facilities or any comm
38、ercial laboratory acceptable to the procuring activity. 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 In
39、spections The examination and testing of clamps shall be classified as: a. Qualification Inspection (see 4.3) b. Conformance Inspection (see 4.4) 4.3 Qualification Inspection 4.3.1 Qualification Test Samples Test samples for qualification tests of AS85052/1, AS85052/2, and AS85052/3 shall consist of
40、 12 clamps of size -02, -04, -06, -08, -10, -12, -16, -20 and -24, plus 20 additional size of -16 clamps for each standard sheet. For the AS85052/1 clamp only, submit 20 additional size -02 clamps. In addition, 20 clamp cushion material slabs shall be provided conforming to ASTM D3182 for each type
41、of cushion material to be tested. Each slab shall identify with the standard sheet number and the direction of weave for fabric reinforced material. Both clamps and material test slabs shall be supplied for each standard sheet to be qualified in the quantities as indicated herein. 4.3.2 Inspection R
42、outine Sample units shall be subjected to the qualification inspection specified in Table 1 in the order specified, conducted 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 (Se
43、e 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 3.5.1.4 4.5.3.4 (See 4.3.1) Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS
44、85052A - 7 -TABLE 1B - CLAMP ASSEMBLY Examination or Test Requirement Test Number of Samples Examination of Product 3.4 4.5.2 58 Diametral Retention 3.5.3.1 4.5.4.1 48 Vibration and Transmissibility 3.5.3.2 4.5.4.2 48 Ozone Resistance13.5.3.3 4.5.4.3 15 (See 4.3.1) Thermal Shock 3.5.3.4 4.5.4.4 5 (S
45、ee 4.3.1) 1When specified on applicable material 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 size code shall be separately packaged and fo
46、rwarded to the test facility specified by the qualifying activity. Samples shall be plainly identified by securely attached durable tags marked with the following information: a. Sample for Qualification Test b. Specification AS85052 Clamp, Loop, Cushion c. Standard Sheet Part Number d. Manufacturer
47、s Part Number e. Name of Manufacturer/Manufacturers CAGE CODE f. 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 requ
48、ired by this specification. The report shall designate the standard sheet part number of the clamps submitted. The report shall also include the manufacturers drawing specifying the dimensions of the clamp in the open and in the closed position, and the manufacturer of the cushion material. 4.4 Conformance Inspection Conformance inspection shall consist of the tests and inspections specified in Table 2. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from I
