1、MILITARY SPECIFICATION INSULATION FELT, THERMAL, GLASS FIBER IINCH-POUNDI MIL-I-16411F 14 November 1988 SUPERSEDING 21 October 1975 (See 6.9) MIL-I-16411E This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This document establishe
2、s requirements for glass fiber insulation felt for thermal insulation of machinery and equipment. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards, The following specifications and standards form a part of this document to the extent specified herein. Unless other
3、wise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL PPP-F-320 - Fiberboard; Corrugated and Solid, Sheet Stock (Conta
4、iner Grade), and Cut Shapes. MILITARY MIL-L-19140 - Lumber and Plywood, Fire-Retardant Treated. let t er . . Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command,
5、 SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by THIS DOCUMENT CONTAINS /.z PAGES* AMSC N/A FSC 5640 DISTRIBUTION STATEMENT A. Approved for public release;
6、 distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS FEDERAL FED-STD-191 - Federal Standard for Textile Test Methods. FED-STD-313 - Material Safety Data, Transportation Data and Disposal Data for Hazardous Materials F
7、urnished to Government Activities. MILITARY MIL-STD-1623 - Fire Performance Requirements and Approved Specifications for Interior Finish Materials and Furnishings (Naval Shipboard Use). Application of Packaging Requirements. MIL-STD-2073-1 - DoD Materiel Procedures for Development and (Unless otherw
8、ise indicated, copies of federal and Military specifications and standards are available from the Naval Publications and Forms Center, (ATTN: NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099). 2.2 Non-Government mblications, The followhg documents form a part of this document to the extent spe
9、cified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (
10、see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) C 167 - Standard Test Methods or Thickness and Density of Blanket or Batt Thermal Insulations. C 177 - Standard Test Method for Steady-State Heat Flux -Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Appar
11、atus. (DoD adopted) D 578 - Standard Specification for Glass Fiber Yarns. D 3773 - Standard Test Methods for Length of Woven Fabric. D 3774 - Standard Test Methods for Width of Woven Fabric. D 3951 - Standard Practice for Commercial Packaging. (DoD adopted) (Applicati.on for copies should be address
12、ed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or o
13、ther informational services.) 2.3 Order of mecedence. In the event of a conflict between the text of 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 h
14、as been obtained. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Material. The material shal
15、l consist of 100 percent glass fibers in accordance with ASTM D 578 and.shal1 be compsed of mechanically bonded laminates without the use of additional binders, No organic fiber or shot shall be included in the material used in the manufacture of the insulation. Insulation shall be furnished in the
16、laminated and felted form (see 6.3). 3.3 Fiber diameter. The average diameter of the individual fibers shall not exceed 0.00036 inch. At least ninety percent of the fibers shall be less than 0.00040 inch diameter (see 4.5.1). 3.3.1 Length - of fiber. Fibers less than 1 inch in length shall not be us
17、ed for processing the fiber into felt (see 4.5.1.1). 3.4 Dimensions and weight. 3.4.1 Length. Unless otherwise specified (see 6.2), insulation shall be furnished in roll lengths of 75 feet for 1/2-inch thick material and 45 feet for 3/4-inch thick and 1-inch thick material. The tolerances shall be p
18、lus 1.0, minus 0.5 feet (see 4.6.2). 3.4.2 Width. Unless otherwise specified (see 6.2), roll width shall be 60 inches, with a tolerance of plus 1.0, minus 0.5 inch (see 4.5.2). 3.4.3 Thickness and weights. Insulation shall be furnished in the thicknesses shown in table I, as specified (see 6.2), and
19、 shall not vary more than plus or minus 10 percent from the weight specified for the ordered thickness (see 4.5.3 and 4.5.4). TABLE I. Thickness and wekht. Nominal (inch) Nominal weight Thickness (ounces) (inch) thickness square foot (ft !er ) tolerance i y 1/2 3/4 1 6.0 12.25 15.0 3.5 Alkalinitv. T
20、he alkalinity of the finished material expressed as sodium oxide (Na20) shall not exceed 0.20 percent (see 4.5.5). 3.6 Fusing temperature. The fusing temperature of the fibers shall be not less than 1300 degrees Fahrenheit (“F) (see 4.5.6). 3.7 Thermal conductivitv. Thermal conductivity (k) in Briti
21、sh thermal unit (Btu) per square foot per hour of insulation for 1F gradient per inch thickness shall not exceed the values at the mean temperatures shown in table II (see 4.5.7). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE II. Thermal co
22、nductivity. Mean temperature Thermal conductivity (k) 75 0.65 700 0.50 500 0.40 300 0.29 3.8 Tensile strength. The tensile strength before and after heating to 1200F shall be not less than 5, O pounds per square inch ( lb/in2) (see 4.5.8). 3.9 Fire resistance. The flammability requirements shall con
23、form to the requirements set forth in MIL-STD-1623 (see 4.5.9). 3.10 Material safetv data sheet (MSDSZ. The contracting activity shall be provided a material safety data sheet at the time of contract award. The MSDS shall be provided in accordance with the requirements of FED-STD-313. The MSDS shall
24、 be included with each shipment of the material covered by this specification (see 6,7). 3.11 Workmanship. The material shall be free from defects which may impair its use (see 4.4). 4. QUALITY ASSURANCE PROVISIONS 4.1 ResDonsibilitv for insDection. Unless otherwise specified in the contract or purc
25、hase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspe
26、ction requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsi
27、bilitv for comDliance. All items shall meet all require- ments of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve th
28、e contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of the manufacturing operations, is an acceptable practice to ascertain conformance to requirements, howe
29、ver, this does not authorize submission of known defective material, either indicated or actual, nor does It commit the Government to accept defective material. 4.2 Classification of insDections. The inspection requirements specified herein are classified as follows: (a) First article inspection (se
30、e 4.3). (b) Quality conformance inspection (see 4.4). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-LbLLF 56 m 77777Ob 0211825 L m MIL-I-16411F 4.2.1 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be perf
31、ormed in accordance with the test conditions specified here in. 4.3 First article inspection. First article inspection shall consist of the examinations specified in table III (see 6.3). If more than one thickness of insulation felt is acquired at any one time, one roll of each thickness shall const
32、itute the first article sample, unless otherwise indicated by the contracting activity. TABLE III. First article and qualitv conformance inspection. Inspection Fiber diameter Length of fiber Length Width Thickness Weight Alkalinity Fusing temp eratur e Thermal conductivity Tensile strength Fire resi
33、stance Requirement 3.3 3.3.1 3.4.1 3.4.2 3.4.3 3.4.3 3.5 3.6 3.7 3.8 3.9 Test 4.5.1 4.5.1.1 4.5.2 4.5.2 4.5.3 - 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8 4.5.9 4.4 Quality conformance inspection. Quality conformance inspection be in accordance with table III (see 6.3). Defects shall be classified in accordance
34、with table IV. TABLE IV. Classification of defects. Category Major : 101 102 103 104 105 shall Defects Type of insulation not as specified. Material less than minimum requirements; evidence of unauthorized materials and processes used; insulation not composed of specified materials. Insulation const
35、ruction nonconforming or not as specified; laminates not bonded as specified; evidence of use of binders, or presence of shot, Insulation not furnished in rolls (when applicable). Length, width and thickness of insulation not as specified. 4.5 Test procedures. 4.5.1 Fiber diameter. The diameter of t
36、he fiber shall be determined by any one of the following methods (see 3.3). Checks for fiber diameter may be made on the raw fiber before processing into felt. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c MIL-I-16411F (a) Microscopic, Diameter
37、 of fibers shall be determined microscop- ically on the basis of measuring 50 random fibers, The average diameter for purposes of determining conformance shall be the average of all measurements. (b) ASTM D 578. 4.5.1.1 Length of fibers, A minimum of seven checks for fiber length shall be made on ea
38、ch of the samples, Two checks for fiber length are required for the raw fiber before processing and after processing into felt. A standard tape measure or ruler calibrated in 1/16-inch increments shall be used (see 3.3.1) 4.5.2 Length and width, Length and width shall be determined by the method spe
39、cified in ASTM D 3773 and ASTM D 3774 respectively (see 3.4.1 and 3.4,2). 4.5.3 Thickness. Thickness shall be determined by the method cited in ASTM C 167, except that the test specimen shall be ruled off into approximately 20 square and equal areas, and the thickness measurement taken at the center
40、 of ten areas, no two of which shall have a common side, In determining the thick- ness, the test specimen shall be placed on a hard, flat surface, and the penetrating pin of the depth gauge shall be forced downward through the specimen, perpendicular to the flat surface as shown on figure 1. If nec
41、essary to prevent compression of the specimen by the depth gauge pin, the specimen shall first be pierced. When the point of the pin touches the flat surface, the sliding disk shall be lowered to the point of contact with the top surface of the specimen. The gauge shall be withdrawn, and the distanc
42、e from the point of the pin to the sliding disk shall be measured to the nearest 1/32-inch. The average of the 10 thickness measurements shall be taken as the thickness of the test specimen (see 3.4.3). 4.5.4 Weight. Each sample shall be weighed in accordance with ASTM C 167 (see 3.4.3). 4.5.5 Alkal
43、inity, A 5 2 0.01 gram representative sample of the felt, shall be weighed and placed in a 500 milliliter (mL) pyrex Erlenmeyer flask. The sample shall be wetted with 5 mL of 95 percent ethyl alcohol and 400 mL of distilled water, and refluxed for 4 hours plus or minus 5 minutes. At the end of this
44、period, the condenser shall be disconnected and the sample filtered at once through a number 41 Whatman paper, or equal, supported in a Buechner funnel and connected to a suction source, The flask and residual material shall be washed three times with 25-mL portions of hot distilled water. Next, the
45、 combined filtrate and wash solution shall be titrated immediately with 0.02N H2SO4 using 6 to 8 drops of a 1 percent solution of phenol-red indicator, to the disappearance of the pink color, A blank determination shall be run on the total amount of distilled water and alcohol and the titration valu
46、e shall be substituted in the formula below (see 3.5): 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-16411F Percent alkalinity expressed as Na20 = (A-B)N x 0.031 x 100 W Where : A = mL H2SO4 required to titrate sample. B = mL H2SO4 required
47、 to titrate the blank. N = Normality of the H2SO4. W = Weight of sample in grams. 4.5.6 Fusing temDerature. A l-gram sample of glass fiber shall be weighed and placed into a crucible which shall be placed in a muffle furnace at room temperature. Heating elements shall be turned on at the start of th
48、e test and adjusted so that the specified temperature of 1300F is reached within 45 f 10 minutes. When this temperature is reached, the crucible shall be removed from the furnace immediately, allowed to cool, and examined visually for fusion. Fusion shall be considered to have taken place if any par
49、t of the sample has melted and formed a homogenous mass (see 3.6). 4.5.7 Thermal conductivity, Thermal conductivity shall be determined in accordance with ASTM C 177 (see 3.7 and 6-3). 4.5.8 Tensile strength. - Tensile strength shall be determined by the grab method described in method 5100 of FED-STD-191 with the following modifications: Test specimens shall be 12 by 14 inches in size. The specimens shall be clamped at the top and bottom sections by
