1、 INCH-POUND MIL-PRF-24699A (SH) 9 November 2004 SUPERSEDING MIL-A-24699 (SH) 24 February 1988 PERFORMANCE SPECIFICATION ACOUSTICAL TRANSMISSION LOSS BARRIER MATERIAL This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Depar
2、tments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for two types of acoustical transmission loss barrier material (see 6.1) 1.2 Classification. Material furnished under this specification is one of the types and classes in Table I as spec
3、ified (see 6.2). TABLE I. Barrier material. Type Description Class Nominal maximum surface density (lb/ft2) I Faced lead free barrier material 1 2 3 0.75 1.0 1.5 II Noncombustible barrier material - 1.0 Comments, suggestions, or questions on this document should be addressed to Commander, Naval Sea
4、Systems Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to commandstandardsnavsea.navy.mil, with the subject line “Document Comment“. Since contact information can change, you may want to verify the currency of this address information usi
5、ng the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 5640 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-24699A (SH) 22. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3,
6、4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet al
7、l specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specifi
8、ed herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL STANDARDS FED-STD-191 - Textile Test Methods. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch or dodssp.daps.dla.mil or from the Stan
9、dardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless other
10、wise specified, the issues of these documents are those cited in the solicitation or contract. U.S. COAST GUARD (USCG) Specification 164.009 - Incombustible Materials for Merchant Vessels. (Copies of this document are available from the Commandant (MMT), U.S. Coast Guard Headquarters, 400 Seventh St
11、reet, SW, Washington, DC.) BUREAU OF MEDICINE AND SURGERY (BUMED) BUMED INST 6270.8 - Procedures for Obtaining Health Hazard Assessments Pertaining to Operational Use of a Hazardous Material. (Copies of this document are available online at https:/bumed.med.navy.mil or from Bureau of Medicine and Su
12、rgery, Department of the Navy, 2300 E Street, NW, Washington, DC 20372-5300.) NAVAL SEA SYSTEMS COMMAND (NAVSEA) S9510-AB-ATM-010 Rev 2 of 30 July 1992 - Nuclear Powered Submarine Atmosphere Control Manual. (Copies of this document are available from the Naval Sea Systems Command, Code SEA 05Z9, 133
13、3 Isaac Hull Avenue, SE, Stop 5133, Washington Navy Yard DC 20376-5133.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. Pr
14、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-24699A (SH) 3AMERICAN SOCIETY FOR QUALITY (ASQ) ASQC Z1.4 - Sampling Procedures and Tables for Inspection by Attributes. (DoD adopted) (Copies of this document are available from www.asq.org or Am
15、erican Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) ASTM INTERNATIONAL C 1139 - Standard Specification for Fibrous Glass Thermal Insulation and Sound Absorbing Blanket and Board for Military Applications. D 638 - Standard Test Method for Tensile Properties of Plastics. (Do
16、D adopted). D 2261 - Standard Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile Testing Machine). (DoD adopted) D 2724 - Standard Test Methods for Bonded, Fused, and Laminated Apparel Fabrics. (DoD adopted) D 3776 - Standard Test Met
17、hods for Mass Per Unit Area (Weight) of Fabric. (DoD adopted) D 5035 - Standard Test Method for Breaking Force and Elongation of Textile Fabrics (Strip Method). (DoD adopted) E 90 - Standard Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements. (D
18、oD adopted) E 162 - Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source. (DoD adopted) E 662 - Standard Test Method for Specific Optical Density of Smoke Generated by Solid Materials. (DoD adopted) E 1123 - Standard Practices for Mounting Test Specimens for
19、Sound Transmission Loss Testing of Naval and Marine Ship Bulkhead Treatment Materials. (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA, 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of
20、this document and the references cited 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. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subje
21、cted to first article inspection in accordance with 4.2. 3.2 Material. Barrier materials shall be fabricated without the use of any type of asbestos. 3.2.1 Type I. Type I barrier material shall consist of a flexible layer with a woven outer facing. Type I barrier material shall be fabricated without
22、 the use of lead. 3.2.2 Type II. Type II barrier material shall consist of a flexible, noncombustible layer. 3.3 Dimensions and quantities. 3.3.1 Width of rolls (type I). Type I barrier material shall be fabricated in rolls. The width of the rolls shall be 26, 38, or 48 inches or as specified (see 6
23、.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-24699A (SH) 43.3.2 Quantity of pieces per roll (type I). The quantity of pieces per roll shall not exceed the values in Table II. TABLE II. Quantity of pieces per roll (type I). Class Maxim
24、um quantity of pieces per roll 1 2 3 3 3 2 3.3.3 Size of panels (type II). Type II barrier material shall be fabricated in panels which shall be 3 feet by 4 feet or 3 feet by 8 feet or as specified (see 6.2). 3.3.4 Tolerance. The tolerance for dimensions of type I and type II barrier material shall
25、not exceed plus or minus 1/4 inch. 3.4 Surface density and weight. 3.4.1 Surface density. Nominal values for surface density shall not exceed the values shown in Table III. The surface density of individual samples may vary within a tolerance of plus or minus 10 percent of the nominal density. TABLE
26、 III. Nominal surface density. Nominal surface density (lb/ft2) Type I, class 1 Type I, class 2 Type I, class 3 Type II 0.75 1.0 1.5 1.0 3.4.2 Weight of rolls (type I). The weight per roll shall be 100 pounds plus or minus 10 percent. 3.5 Breaking force. Breaking force shall be as specified in Table
27、 IV. TABLE IV. Minimum breaking force. Warp breaking force (lb/in) Fill breaking force (lb/in) Type I Type II 400 400 300 300 3.6 Tearing strength (type I only). Minimum tearing strength shall be as specified in Table V. TABLE V. Tearing strength. Warp tear strength (lb) Fill tear strength (lb) Type
28、 I 50 40 3.6.1 Rivet and grommet load bearing strength. Load bearing strength shall be not less than the values specified in Table VI. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-24699A (SH) 5TABLE VI. Rivet and grommet load bearing stren
29、gth. Pounds of pull Type I Type II 180 180 3.7 Flexural rigidity. Flexural rigidity values shall not exceed the values in Table VII. In addition, the barrier material shall show no visible rupture or cracking on the outer or inner surfaces during and following the test. TABLE VII. Maximum flexural r
30、igidity. F Inch-pounds 45 133 1.0 0.3 3.8 Peel strength (type I). Woven outer facing 180 degree peel strength shall be in accordance with Table VIII. TABLE VIII. Minimum woven outer facing peel strength. Warp (lb/in) Fill (lb/in) Type I 4 2 3.9 Fire resistance. Fire resistance shall be as specified
31、below. 3.9.1 Flammability (type I). Materials shall provide a flame spread index of 30 or less. 3.9.2 Smoke density (type I). Materials shall not exceed the smoke density limits specified in Table IX . TABLE IX. Smoke density (type I). Class Rating 1 2 3 300 350 450 3.9.3 Noncombustibility (type II)
32、. Type II barrier material shall be noncombustible. 3.10 Sound transmission loss. Sound transmission loss shall be as specified below. 3.10.1 Type I material. Sound transmission loss values of type I barrier material in decibels (dB) shall be not less than the minimum values specified in Tables X, X
33、I, and XII. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-24699A (SH) 6TABLE X. Minimum sound transmission loss values in dB for type I, class 1. One-third octave band center frequency in Hz Hz 100 125 160 200 250 315 400 500 630 800 1000 1
34、250 1600 2000 2500 3150 4000 5000 dB 13 10 10 13 14 15 17 19 21 22 25 26 28 30 32 33 35 37 TABLE XI. Minimum sound transmission loss values in dB for type I, class 2. One-third octave band center frequency in Hz Hz 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 dB 12
35、 12 12 14 16 17 19 21 23 24 26 28 30 32 34 36 38 39 TABLE XII. Minimum sound transmission loss values in dB for type I, class 3. One-third octave band center frequency in Hz Hz 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 dB 15 14 14 18 19 20 22 24 27 28 31 32 33 3
36、6 38 40 42 43 3.10.2 Type II material. Sound transmission loss values of type II barrier material in decibels shall be not less than the minimum values specified in Table XIII. TABLE XIII. Minimum sound transmission loss values in dB for type II. One-third octave band center frequency in Hz Hz 100 1
37、25 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 dB 15 12 18 28 34 39 43 45 50 53 56 57 57 58 60 65 67 69 3.11 Toxicity. When evaluated in accordance with 4.4.9, the barrier material shall have no adverse effect on the health of personnel when used for its intended purpose
38、and shall not cause any environmental problems during waste disposal (see 4.4.9 and 6.5). 3.12 Workmanship. The material shall be free of cracks, scratches, dents, imbedded particles, broken edges or corners, and other defects which could affect serviceability. 3.13 Off-gassing. The barrier material
39、 shall meet the requirements in the Nuclear Powered Submarine Atmosphere Control Manual, NAVSEA Technical Manual S9510-AB-ATM-010 Rev 2, for a usage category of Limited (see 4.4.10 and 6.6). 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classifie
40、d as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.1.1 Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordance with the test conditions specified herein. Provided by IHSNot for ResaleNo reproduction or networking pe
41、rmitted without license from IHS-,-,-MIL-PRF-24699A (SH) 74.2 First article inspection. First article inspection shall consist of the tests specified in 4.4 as outlined in Table XIV. TABLE XIV. First article inspection. Inspection Requirement paragraph Test paragraph Dimensions and quantities Width
42、of rolls (type I) 3.3.1 4.4.1 Quantity of pieces per roll (type I) 3.3.2 4.3.2.1 Size of panels (type II) 3.3.3 4.4.1 Surface density and weight Surface density 3.4.1 4.4.2.1 Weight of rolls (type I) 3.4.2 4.4.2.2 Breaking force 3.5 4.4.3 Tearing strength (type I) 3.6 4.4.4 Rivet and grommet load be
43、aring strength 3.6.1 4.4.4.1 Flexural rigidity 3.7 4.4.5 Peel strength (type I) 3.8 4.4.6 Fire resistance Flammability (type I) 3.9.1 4.4.7.1 Smoke density (type I) 3.9.2 4.4.7.2 Noncombustibility (type II) 3.9.3 4.4.7.3 Sound transmission loss Type I material 3.10.1 4.4.8.1 Type II material 3.10.2
44、4.4.8.2 Toxicity 3.11 4.4.9 Workmanship 3.12 4.3.2.1 Off-gassing 3.13 4.4.10 4.2.1 Lot. A lot shall consist of all finished material of one size produced in a continuous run (or at the same time and under the same conditions) and offered for delivery at one time. 4.2.2 The tests specified in 4.4.7,
45、4.4.8 and 4.4.9 need only be conducted for one of the following reasons: a. If within a 3-year period preceding the date of the invitation for bids, the material has not been tested and found in conformance to 3.9, 3.10, and 3.11, respectively, or b. If the material offered for delivery is not manuf
46、actured the same in all respects as that previously tested. 4.3 Conformance inspection. Conformance inspection shall be in accordance with Table XV and 4.3.2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-24699A (SH) 8TABLE XV. Conformance
47、inspection. Inspections Requirement paragraph Test paragraph Group A Dimensions and quantities Width of rolls (type I) Quantity of pieces per roll (type I) Size of panels (type II) Surface density and weight Surface density Weight of rolls (type I) Workmanship 3.3.1 3.3.2 3.3.3 3.4.1 3.4.2 3.12 4.4.
48、1 4.3.2.1 4.4.2 4.4.2.1 4.4.2.2 4.3.2.1 Group B Breaking force Tearing strength (type I) Rivet and grommet load bearing strength Flexural rigidity Peel strength (type I) 3.5 3.6 3.6.1 3.7 3.8 4.4.3 4.4.4 4.4.4.1 4.4.5 4.4.6 4.3.1 Lot. A lot shall consist of all finished material of one size produced
49、 in a continuous run (or at the same time and under the same conditions) and offered for delivery at one time. The sampling unit shall be one roll or panel. 4.3.2 Sampling. 4.3.2.1 Sampling for visual and dimensional examination. For visual and dimensional examination (group A of Table XV), a random sample shall be selected from each lot in accordance with ASQC Z1.4 at inspection level I. Each of the samples take
