1、Comments, suggestions, or questions on this document should be addressed to Commander, Naval Sea Systems Command, ATTN: SEA 05M2, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 5330 INCH-POUND MIL-PRF-15624G 15 June 2009 SUPERSEDING MIL-PRF-15624F 25 May 1994 PERFORMANCE SPECIFICATION GASKET MATERIAL, RUBBER, 50
3、 DUROMETER HARDNESS (MAXIMUM) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for synthetic rubber materials for gaskets 50 durometer hardness (maximum). 1.2 Classification. The s
4、ynthetic rubber is furnished in the following classes, as specified (see 3.2 and 6.2): Class I - Oil resistant, (chloroprene rubber). Class II - Non-oil resistant, (butadiene-styrene rubber). Class III - Fuel resistant, (butadiene-acrylonitrile rubber). 2. APPLICABLE DOCUMENTS 2.1 General. The docum
5、ents listed in this section are specified in sections 3, 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
6、list, document users are cautioned that they must meet all 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 ha
7、ndbooks 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. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-190 - Identification Marking of Rubber Products MIL-STD-289 - Visual Inspection Guid
8、e for Rubber Sheet Material MIL-STD-298 - Visual Inspection Guide for Rubber Extruded Goods MIL-STD-407 - Visual Inspection Guide for Rubber Molded Items MIL-STD-1916 - DoD Preferred Methods for Acceptance of Product (Copies of these documents are available online at http:/assist.daps.dla.mil/quicks
9、earch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-15624G 2.2.2 Other Government documents, drawings, and publications. The fo
10、llowing other Government documents, drawings, and publications 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. BUREAU OF MEDICINE AND SURGERY (BUMED) BUMED INST 6270.8 - Occupation
11、al Health Hazard Assessment (Copies of this document are available from the Bureau of Medicine and Surgery, Department of the Navy, 2300 E Street, NW, Washington DC 20372-5300 or online at http:/navymedicine.med.navy.mil.) NAVAL SEA SYSTEMS COMMAND (NAVSEA) PUBLICATIONS S9510-AB-ATM-010 - Nuclear Po
12、wered Submarine Atmosphere Control Manual (Copies of the chapter titled “Material Control Program“ are available online at https:/smcl.dt.navy.mil or from Commander, Naval Sea Systems Command, ATTN: SEA 05Z4, 1333 Isaac Hull Ave. SE Stop 5122, Washington Navy Yard, DC 20376-5122.) 2.3 Non-Government
13、 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. ASTM INTERNATIONAL ASTM D395 - Standard Test Methods for Rubber Property - Compression Set. (
14、DoD adopted) ASTM D412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension. (DoD adopted) ASTM D471 - Standard Test Method for Rubber Property - Effect of Liquids. (DoD adopted) ASTM D573 - Standard Test Method for Rubber - Deterioration in an Air Oven. (DoD adopted)
15、 ASTM D792 - Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement. (DoD adopted) ASTM D2240 - Standard Test Method for Rubber Property - Durometer Hardness. (DoD adopted) ASTM D2565 - Standard Practice for Xenon-Arc Exposure of Plastics Intended for O
16、utdoor Applications. (DoD adopted) (Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., PO Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict be
17、tween 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 and 3.1
18、.1), a sample shall be subjected to first article inspection in accordance with 4.2. 3.1.1 First article inspection. First article inspection shall be performed when one or more of the following apply: a. Upon initial offering of a material to the government by the vendor. 2 Provided by IHSNot for R
19、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-15624G b. When any change in material formulation is made from previous first article test samples. c. When any change in manufacturing processes or conditions are made from previous first article test samples. d. When
20、 the product being offered is manufactured at a plant different than that of previous first article test samples. e. When required by the Naval Sea Systems Command. 3.2 Material. The material shall be vulcanized synthetic rubber, which meets the applicable requirements specified herein. 3.2.1 Recycl
21、ed, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cy
22、cle costs. 3.2.2 Form. The synthetic rubber gasket material shall be furnished in the form specified (see 6.2). This form may be sheets, strips of rectangular cross section, shapes cut from sheets, molded shapes or extruded shapes. Laminated form shall not be used. 3.2.2.1 Sheet. Sheet rubber shall
23、have smooth surfaces and shall have the thickness specified (see 6.2). Unless otherwise specified (see 6.2), the tolerances in thickness specified in table I shall apply. Unless otherwise specified (see 6.2), sheet rubber shall be furnished in rolls 361 inch wide and the length shall be 601 inch. Ro
24、lls shall consist of not more than four lengths of sheet. In no case shall the length of a sheet be less than the width. TABLE I. Tolerances in width and thickness. Width, Inches Tolerance (Plus or Minus) Thickness, Inch Tolerance (Plus or Minus) Less than 116 1100 Inch 132 to 116 1128 Inch 116 to 1
25、8, inclusive 164 Inch 116 to 18, inclusive 164 Inch 18 to 12, inclusive 132 Inch 18 to 12, inclusive 132 Inch 12 to 1, inclusive 364 Inch 12 to 1, inclusive 364 Inch 1 to 2, inclusive 116 Inch Over 1 116 Inch Over 2 3% 3.2.2.2 Strip. Strip rubber of rectangular cross section shall have a smooth surf
26、ace and shall have the cross sectional dimensions specified (see 6.2). Unless otherwise specified (see 6.2), the tolerances in thickness and width specified in table I shall apply. Unless otherwise specified (see 6.2), strip rubber shall be furnished in lengths of 11 feet. 3.2.2.3 Cut, molded, and e
27、xtruded shapes. Cut, molded, and extruded shapes shall have the form, dimensions, and tolerances as specified (see 6.2). 3.3 Physical requirements. The rubber gasket materials shall conform to the requirements specified in table II. 3 Provided by IHSNot for ResaleNo reproduction or networking permit
28、ted without license from IHS-,-,-MIL-PRF-15624G TABLE II. Physical requirements of rubber. Material Condition First Article Conformance Class I Class II Class III Test Method Initial properties: Tensile strength, psi, minimum X X 1500 1000 1500 4.6.1 Ultimate elongation, percent, minimum X X 400 300
29、 400 4.6.1 Hardness, durometer points, maximum X X 50 50 50 4.6.2 Specific gravity, maximum X X 1.60 1.40 1.40 4.6.3 Tensile stress (modulus) psi at 100% elongation X X As determined As determined As determined 4.6.1 Sealing pressure, psi, minimum X 95 95 95 4.6.4 Properties after oven aging: Tensil
30、e strength, percent of initial, minimum X 75 75 75 4.6.5.1 Ultimate elongation, percent of initial, minimum X 70 70 70 4.6.5.1 Hardness, durometer points, maximum X 65 65 65 4.6.5.2 Tensile stress (modulus) psi at 100% elongation X As determined As determined As determined 4.6.1 Compression set, per
31、cent, maximum X 30 30 30 4.6.5.3 Sealing pressure, psi, minimum X 70 70 70 4.6.5.4 Properties after light aging: Tensile strength, percent of initial, minimum X 75 75 75 4.6.6 Ultimate elongation, percent of initial, minimum X 70 70 70 4.6.6 Properties after low temperature aging: Flexibility X No c
32、racks, tears, or separation No cracks, tears, or separation No cracks, tears, or separation 4.6.7 Properties after liquid immersions: Volume change, after water immersion, percent X 0 to 5 N/A N/A 4.6.8 Extraction, percent, maximum X 0.5 N/A N/A 4.6.9 Volume change, after immersion in ASTM No. 1 oil
33、, percent X 0 to 10 N/A N/A 4.6.10 Volume change, after immersion in Reference Fuel B, percent X N/A N/A 0 to 30 4.6.11 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-15624G 3.4 Workmanship. The workmanship shall meet the requirements of t
34、his specification and gasket surfaces shall be free of surface voids, tears, rips, cuts, and free from all foreign matter that may affect the use of the finished product. 3.5 Toxicity. When evaluated in accordance with 4.7, the gasket material shall have no adverse effect on the health of personnel
35、when used for its intended purpose and shall not cause any environmental problems during waste disposal (see 4.7 and 6.4). 3.6 Off-gassing. The gasket material shall be certified for and assigned a usage category of either “Permitted” or “Limited” in accordance with NAVSEA S9510-AB-ATM-010 chapter t
36、itled “Material Control Program” (see 4.8 and 6.5). 3.7 Identification. Material supplied under this specification shall be identified in accordance with MIL-STD-190. Class I material shall be marked with a yellow color and Class III material with a red color. No environmental color identification i
37、s necessary for Class II material. Marking shall be done with a permanent marking material. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First
38、 article inspection. When required (see 6.2 and 3.1.1), all tests and examinations listed in 4.5 and 4.6 through 4.8 shall be conducted on samples from (or representing) the first lot of material. 4.2.1 Rejection for nonconformance. If any of the first article examinations or tests do not conform to
39、 the applicable requirements, this shall be cause for denial to proceed with the production of gaskets. 4.3 Conformance inspections. Conformance inspections shall include the examinations specified in 4.5, and the conformance tests specified in table II. Conformance inspections shall be conducted on
40、 samples from (or representing) all lots. 4.4 Sampling. 4.4.1 Lot. For the purposes of sampling, examinations, and tests, a lot shall consist of not more than one class of material of the same form and dimensions, produced in one plant under the same conditions, not exceeding 2500 pounds, and offere
41、d for delivery at one time. 4.4.2 Sampling for examination. Random samples shall be taken from each lot in accordance with MIL-STD-1916 for the examination specified in 4.5. A unit area of material is defined as one square foot, regardless of thickness. 4.4.3 Classification of defects. (see 6.6.1 an
42、d 6.6.2) Refer to MIL-STD-289, MIL-STD-298, and MIL-STD-407 for classification of defects in rubber sheet material, rubber extruded goods, and rubber molded items, respectively. 4.4.4 Sampling for tests. Representative samples shall be taken at random from each lot that passes the requirements of 4.
43、5 in sufficient quantity to conduct the first article inspection or the conformance tests specified in 4.2 and 4.3. If the items are of such size or shape that test specimens cannot be prepared from them, a substitute sample shall be provided in the form of a piece or pieces of rubber having dimensi
44、ons appropriate to the tests required. The substitute sample shall be certified to be of the same material and equivalent cure as that used in the lot of finished material offered for delivery. 4.5 Examination. Each of the samples taken in accordance with 4.4.2 shall be subjected to surface examinat
45、ion for workmanship, marking, dimensions, and tolerances. MIL-STD-289, MIL-STD-298, and MIL-STD-407 shall be used to determine and evaluate visual defects in rubber sheet material, rubber extruded goods, and rubber molded items, respectively. Acceptance criteria shall be as specified (see 6.2). 5 Pr
46、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-15624G 4.6 Test methods. Unless otherwise indicated in the test method, tests shall not be conducted on the test specimens prior to a conditioning period of 4 hours at room temperature 73.43.6 F (
47、232 C). Sample preparation may be undertaken without regard to this time interval. 4.6.1 Tensile properties. Tensile strength, ultimate elongation, and tensile stress (modulus) at 100 percent elongation shall determined in accordance with ASTM D412, Test Method A, using Die C specimens 0.0800.010 in
48、ch thick. 4.6.2 Hardness. The hardness shall be determined in accordance with ASTM D2240 using a Type A durometer. 4.6.3 Specific gravity. The specific gravity shall be in accordance with ASTM D792. 4.6.4 Sealing pressure. The sealing pressure shall be determined in accordance with A.4 of Appendix A
49、. 4.6.5 Oven aging. ASTM D573 shall be used for oven aging. The aging conditions shall be 46 hours at 1941.8 F (901 C). 4.6.5.1 Tensile properties after oven aging. The tensile strength, ultimate elongation and tensile stress (modulus) at 100 percent elongation after oven aging shall be determined by the procedure in 4.6.1. 4.6.5.2 Hardness after oven aging. The hardness after oven aging shall be determined by
