1、MIL-G-ZY737 53 m 777970b 0305253 O m 2. APPLICABLE DOCUMENTS . 2.1 Government documents. I INCH-POUND/ MIL-G-24717(SH) 31 March 1989 MILITARY SPECIFICATION GASKET, SHEET, REFRIGERATION, NON-ASBESTOS This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and
2、is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for non- asbestos formulated sheet gasket material for refrigeration service applica- tions up to 150 pounds per square inch (lb/in 2 ) gauge, 275 de
3、grees Fahrenheit (“F) (135 degrees Celsius (“C) and in vacuum service applications up to 18 in mercury (Hg) gauge, minus 60F (minus 51C). 2.1.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise speci
4、fied, 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 L-P-378 - Plastic Sheet and Strip, Thin Gauge, Polyolefin. W-L-825 - Lubri
5、cating Oil, Refrigerant Compressor, Uninhibited. 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, SEA 5523, Department of the Navy, Washington, DC 20362-5101
6、 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. THIS DOCUMENT CONTAINS $8 PAGES. I AMSC N/A FSC 5330 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for
7、ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-2I717 53 D 777770b 010525Y 2 D MIL-G-24717(SH) FEDERAL - Continued PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall. PPP-B-1055 - Barrier Material, Waterproofed, Flexible.
8、PPP-F-320 - Fiberboard; Corrugated and Solid, Sheet Stock (Container Grade), and Cut Shapes. MILITARY MIL-P-116 - Preservation, Methods of. MIL-L-19140 - Lumber and Plywood, Fire-Retardant Treated. STANDARDS MILITARY MIL- STD-1186 - Cushioning, Anchoring, Bracing, Blocking and MIL-STD-2073-1 - DoD M
9、ateriel Procedures for Development and Waterproofing; with Appropriate Test Methods. Application of Packaging Requirements. (Unless otherwise indicated, copies of federal and military specifications and standards are available from the Naval Publications and Forms Center, (ATTN: NPODS), 5801 Tabor A
10、venue, Philadelphia, PA 19120-5099.) 2.2 Bon-Government Dublications. The following documents form a part of this document to the extent specified 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 solicitati
11、on. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE, INC. (ANSI) B16.5 - Pipe Flanges and Flanged Fittings. (DoD adopted) (Application for copies should be addresse
12、d to the American National Standards Institute, Inc., 1430 Broadway, New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 471 - Standard Test Method for Rubber-Property Effect of D 3951 - StandardPractice for Commercial Packaging. F 36 - Standard Test Method for Compressibility a
13、nd Recovery of F 37 - Standard Test Methods for Sealability of Gasket Material. F 38 - Standard Test Methods for Creep Relaxation of a Gasket F 104 - Standard Classification System for Nonmetallic Gasket F 146 - Standard Test Methods for Fluid Resistance of Gasket Liquids. (DoD adopted) (DoD adopted
14、) Gasket Materials. (DoD adopted) (DoD adopted) Material. (DoD adopted) Materials. (DoD adopted) Materials. (DoD adopted) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-247L7 53 9 9979906 0305255 L! MIL-G-24717(SH) ASTM (Continued) F 147 - S
15、tandard Test Method for Flexibility of Non-Metallic F 152 - Standard Test Methods for Tension Testing of Nonmetallic Gasket Materials. (DoD adopted) Gasket Materials. (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philad
16、elphia, 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 other informational services.) 2.3 Order of Drecedence. In the event of a confl
17、ict 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 has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2),
18、 a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Material. 3.2.1 ComDosition. Unless otherwise specified (see 6.2), the sheet gasket material shall be composed of various organic or inorganic materials and binders according to the manufacturers design. T
19、he material shall meet the requirements of this specification. Asbestos and components containing asbestos are prohibited. The contractor may use any standard test methods available to test for these materials. 3.2.2 Recovered materials. Unless otherwise specified herein, all material incorporated i
20、n the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid
21、waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.3 Dimensions and tolerances. 3.3.1 Thi
22、ckness. Thickness and tolerance of sheet gasket material shall be in accordance with ASTM F 104, as specified (see 6.2) and shall be determined as specified in 4.5.1.1. 3.3.2 Width and length. - Gasket material shall be furnished in widths and lengths as specified (see 6.2). Since sheet gasket mater
23、ials are normally produced in 60- by 180-inch sheets, acquisition requests should state lengths and 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MfL-G-297lt7 53 m 777770b 01105256 h m MIL-G-24717(SH) widths, such as 60- by 60-inch sheets or 30-
24、by 60-inch sheets. Tolerance limits for length and width for all sizes shall be plus or minus 1/4 inch. Width and length shall be determined in accordance with 4.5.1.2. 3.4 Tensile strenpth. Tensile strength shall be a minimum of 1,700 lb/in2 in the weakest axis using a thickness of 1/16 inch (see 4
25、.5.2). 3.5 Gasket and fluid ComDatibility. Fluid media compatibility shall be determined by comparing tensile strength measurements after fluid immersion with the tensile strength measurement before immersion (see 3.4). Tensile strength shall be a minimum of 1,300 lb/in2 in the weakest axis after 1,
26、000 hours of immersion in refrigerant lubricating oil RCO-2 (W-L-825, type II) (see 4.5.3). 3.6 Sealabilitv. The gasket leak rate shall not exceed 2 milliliters (mL) per hour (see 4.5.4). 3.7 ComDressibility and recovery. Compressibility shall be within the range of 7 to 17 percent. Recovery shall b
27、e a minimum of 40 percent (see 4.5.5). 3.8 Creep relaxation. Creep relaxation shall be a maximum of 60 percent (see 4.5.6). 3.9 Adhesion. Adhesion shall not exceed step (3) of the scale specified in 60.l(g) of appendix A (see 4.5.7). 3.10 Flexibility. The material shall not crack or delaminate (see
28、4.5.8) 3.11 Refrigerant exDosure and leakage (hivh side). The gasket material shall show no leakage when tested as specified in 4.5.9. 3.12 Refrigerant exDosure and leakage (low side). The gasket material shall show no leakage when tested as specified in 4.5.9. 3.13 Identification markings. Unless o
29、therwise specified (see 6.2), each sheet shall be legibly and permanently marked with the following informa- tion : (a) Non-asbestos (b) Specification number (c) Manufacturers name (d) Manufacturers product identification Markings shall be not less than 3/8 inch in height on one side only and on eve
30、ry square foot or less of the material. 3.14 WorkmanshiD. The gasket material shall be uniform in quality and condition. It shall be clean, smooth, and free from all foreign materials and defects that will impair material use and serviceability. 4 h . a a Provided by IHSNot for ResaleNo reproduction
31、 or networking permitted without license from IHS-,-,-MIL-G-24717 53 W 7777906 D105257 8 W MIL-G-24717(SH) 4. QUALITY ASSURANCE PROVISIONS 41 Responsibilitv for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspecti
32、on 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 inspection requirements specified herein, unless disapproved by the Government. Th
33、e 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 Responsibilitv for comDliance. All items shall meet all requirements of sections 3 an
34、d 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 the contractor of the responsibility of ensuring that all products or supplies su
35、bmitted 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, however, this does not authorize submission of known defective material, either ind
36、icated 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 (see 4.3). (b) Quality conformance inspection (see 4.4). 4.2.1 Inspection conditio
37、ns. Unless otherwise specified (see 6.2) all inspections shall be performed in accordance with the test conditions specified here in. 4.3 First article inspection. First article inspection shall consist of the examination and tests specified in table I (see 6.3 and 6.4). TABLE I. First article insDe
38、ction. Inspection Examination Dimensions: Thickness Width and length Tensile strength Fluid and media Sealability Compressibility and recovery Creep relaxation Adhesion Flexibility Refrigerant exposure and leakage 5 Requirement 3.14 3.3.1 3.3.2 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 and 3.12 Test method
39、4.4.3 4.5.1.1 4.5.1.2 4.5.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8 4.5.9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-Zq737 53 9999906 0305258 T MIL-G-24717(SH) 4.4 Oualitv conformance inspection. Quality conformance inspection shall be as spec
40、ified in table 11 (for groups A, B, and C) and 4.4.1 through 4.4.4 (see 6.3). TABLE II. Ouality conformance. r Inspection Group A Thickness Width and length Group B Tensile strength Fluid and media Sealability Flexibility Group C Compressibility and recovery Creep relaxation Adhesion Refrigerant exp
41、osure and leakage Requirement 3.3.1 3.3.2 3.4 3.5 3.6 3.10 3.7 3.8 3.9 3.11 and 3.12 Test method 4.5.1.1 4.5.1.2 4.5.2 4.5.3 4.5.4 4.5.8 4.5.5 4.5.6 4.5.7 4.5.9 4.4.1 m. For purposes of sampling, a lot shall consist of all sheets of the same class, thickness, width, and length produced under the sam
42、e conditions and offered for delivery at one time. 4.4.2 SamDling. 4.4.2.1 SamDling for examination of gasket material. A random sample of rolls or sheets shall be selected from each lot offered for examination in accordance with table III. number from each shipping The sample rolls or sheets shall
43、be obtained in equal container. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE III. m. I Lot size 2 - 50 51 - 90 91 - 150 151 - 280 281 - 500 501 - 1200 1201 - 3200 3201 - 10000 10001 - 35000 35001 - OVER 2 - 15 16 - 25 26 - 90 91 - 150 151
44、- 280 281 - 500 501 - 1200 1201 - 3200 3201 - OVER Major Defects Sample size I Accept I Rej ect 5 7 11 13 16 19 23 29 35 40 O O O O O O O O O O 1 1 1 1 1 1 1 1 1 1 1/ All defective items shall be replaced with acceptable items prior to lot acceptance. Inspect sample size until reject criteria is rea
45、ched. 2/ Rejected lots may be screened and resubmitted for inspection and retest. 4.4.2.2 Samplinp for tests. Two samples, each 12 by 12 inches, shall be selected from each lot for the tests specified in 4.5.2 through 4.5.9. Failure in any test shall be cause for rejection of that lot. 4.4.3 PrePara
46、tion_for. Each of the rolls or sheets shall be surface examined to determine conformance to table IV. Gasket material that is delivered in rolls shall be unrolled sufficiently to expose the required sample area (square foot). Both sides (faces) of the material shall be inspected, regardless of wheth
47、er flat sheet or roll materials are being inspected. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-G-247L7 53 m 777770b OL052b0 8 m MIL-G-24717(SH) TABLE IV. Classification of defects, Category Major 101 102 103 104 105 Minor 201 I tem Sheets
48、 Sheets Sheets Sheets Sheets Sheets Defect Marking is not as specified; class and manufacturers name and brand missing. gouges, indentation or bumps. Surface is not free of scratches, Evidence of lubricant on the sheets. Sheet is damaged; not suitable for Thickness not as specified. making gaskets.
49、Width and length not as specified. 4.4.4 Lot tests. The rolls or sheets shall be subjected to the tests specified in 4.5.2 through 4.5.9. Failure in any test shall be cause for rejection of the lot. 4.5 Tests. 4.5.1 Dimensions and tolerances. 4.5.1.1 Thickness. Thickness shall be determined in accordance with ASTM F 104 (see 3.3.1). 4.5.1.2 Width and length. - Width and length shall be determined by direct measurement using a stand
