1、 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-500
2、0 or sent by email to usarmy.detroit.rdecom.mbx.tardec-standardizationmail.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 5640 DISTRIBUTION STATEMENT A. Approved for pu
3、blic release; distribution is unlimited. INCH-POUND A-A-52411A November 1, 2012 SUPERSEDING A-A-52411(AT) October 9, 1992 COMMERCIAL ITEM DESCRIPTION INSULATION, MOLDED, NOISE BARRIER The General Services Administration has authorized the use of this commercial item description as a replacement for
4、MIL-I-62520(AT) for all federal agencies. 1. SCOPE. This commercial item description (CID) covers an expandable, self-skinning insulation material intended for use in applications where a chemical-resistant, sealed, molded noise barrier is required. 2. SALIENT CHARACTERISTICS. 2.1 Materials. The ins
5、ulation shall be as specified herein. The use of recovered material made in compliance with section 402 of the Clean Air Act (33 U.S.C. 1342 et. seq.) is acceptable providing that all requirements of this CID are met. 2.2 Design and configuration. The design and configuration of the insulation shall
6、 be as specified in the applicable drawing (see 6.2). 2.2.1 Color. The color of the insulation shall be black. 2.3 Physical properties. 2.3.1 Surface density. The surface density of 1-inch thick insulation shall be 1.2.12 pounds per square foot. Provided by IHSNot for ResaleNo reproduction or networ
7、king permitted without license from IHS-,-,-A-A-52411A 2 2.4 Performance. 2.4.1 Tear resistance. The tear resistance of the insulation shall be not less than 4 pounds force per inch (ppi) when tested in accordance with ASTM D624, die C. 2.4.2 Tensile strength. The tensile strength of the insulation
8、shall be not less than 25 pounds per square inch (psi) when the insulation is heat aged at 250l0 F for 48 hours and tested in accordance with ASTM D412, die C. 2.4.3 Elongation. The elongation of the insulation when heat aged at 250l0 F for 48 hours shall be not less than 80 percent when tested in a
9、ccordance with ASTM D412, die C. 2.4.4 Flammability. The burn rate of the insulation shall be not greater than 2 inches per minute when tested in accordance with SAE J369. 2.4.5 Impact resistance. When using a Gardner impact tester having a 1-kilogram dart with a 1.6 centimeter diameter, insulation
10、2 inches by 4 inches by 1-inch thick, shall be conditioned at 775 F and 505% relative humidity for 7 days and then conditioned at -502 F for not less than 4 hours. While in this conditioned state the insulation shall be capable of withstanding an impact of not less than 15 centimeter-kilograms. Afte
11、r being allowed to return to room temperature for 15 minutes, the insulation shall be bent around a 2-inch radius bar in the tested area and examined for cracks or other evidence of failure. 2.4.6 Flexibility. Insulation, 1 inch by 8 inches by 1-inch thick, shall be conditioned at 775 F and 505% rel
12、ative humidity for 7 days; 250 F for 4 hours with a 1-hour recovery at 775 F; and -50 F for 4 hours with a 1-hour recovery at 775 F. While in this conditioned state, the insulation shall be capable of being bent around a 1-inch mandrel without cracking. 2.4.7 Acoustical performance. The acoustical p
13、erformance of 1-inch thick insulation mounted on 20-gauge steel shall be as specified in table I and tested in accordance with ASTM E90. TABLE I. Noise barrier properties. Frequency (hertz) Sound transmission loss (decibels) 160 16 250 20 500 21 1000 36 2000 50 4000 58 Provided by IHSNot for ResaleN
14、o reproduction or networking permitted without license from IHS-,-,-A-A-52411A 3 2.5 Material safety data sheet (MSDS). An MSDS shall be prepared in accordance with FED-STD-313 (see 6.2 and 6.5). 2.6 Identification and marking. Unless otherwise specified in the drawing, identification and marking sh
15、all be permanent and legible and shall include as a minimum the manufacturers name, the part number, and the national stock number (NSN). Identification and marking shall be accomplished without adversely affecting the acceptance and function of the finished product. 2.7 Workmanship. Workmanship sha
16、ll be such that the insulation is uniform in color, mechanical properties and density, and is free of defects which would adversely affect its life, serviceability, or appearance. 3. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use recovered materials to the maximum extent practi
17、cable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR). 4. PRODUCT CONFORMANCE PROVISIONS. 4.1 Product conformance. The products provided shall meet the salient characteristics of this Commercial Item Description, conform to the producers own drawings, specifications,
18、 standards, and quality assurance practices, and be the same product offered for sale in the commercial marketplace. The government reserves the right to require proof of such conformance. 5. PACKAGING. Preservation, packaging, packing, labeling, and marking for the desired level shall be as specifi
19、ed in the contract (see 6.2). 6. NOTES. (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Addresses for obtaining copies of referenced documents. 6.1.1 Government documents. Copies of FED-STD-313 “Materials Safety Data, Transportati
20、on Data and Disposal Data for Hazardous Materials“ and FED-STD-376 “Preferred Metric Units for General Use by the Federal Government” are available from https:/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. P
21、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52411A 4 6.1.2 Non-Government publications. Copies of ASTM D412 “Standard Test Methods for Rubber Properties in Tension“; ASTM D624 “Standard Test Methods for Rubber Property-Tear Resistance“; and AS
22、TM E90 “Standard Test Method for Laboratory Measurements of Airborne Sound Transmission Loss of Building Partitions” are available from the American Society for Testing and Materials (ASTM), 1916 Race Street, Philadelphia, PA 19103. SAE J369 “Flammability of Polymetric Interior Materials“ are availa
23、ble from www.astm.org or ASTM International, P.O. Box C700, West Conshohocken, PA 19428-2959. 6.2 Ordering data. Acquisition documents must specify the following: a. Title, number, and date of this CID. b. Specific issue of individual documents referenced (see 6.1). c. Title, number, and revision le
24、tter of the applicable engineering drawing and part number (see 2.2 and 2.6). d. Identify activities requiring copies of completed MSDS and the number of copies required (see 2.5 and 6.5). e. Applicable levels of preservation, packaging, packing, labeling and marking (see 5). 6.3 Cross-reference dat
25、a. Insulation conforming to this CID is interchangeable/ substitutable with insulation conforming to MIL-I-62520(AT). 6.4 MSDS. The contracting officer should identify those activities requiring copies of the completed MSDS prepared in accordance with FED-STD-313. Additional pertinent Government mai
26、ling addresses for submission of data are listed in appendix B of FED-STD-313 (see 2.5 and 6.2). 6.5 Metric product. Insulation manufactured to metric dimensions will be considered on the following basis: a. Products manufactured to metric dimensions will be considered on an equal basis with those m
27、anufactured using inch-pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of FED-STD-376, and all other requirements of this CID are met. b. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances
28、specified in the inch/pound units, a request should be made to the contracting officer to determine if the product is acceptable. c. The contracting officer has the option of accepting or rejecting the product. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
29、 IHS-,-,-A-A-52411A 5 Custodians: Preparing activity: Army - AT Army - AT Review activities: DLA - IS (Project 5640-2009-004) NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
