1、INCH-POUNDMIL-PRF-1149D10 June 1998 SUPERSEDINGMIL-G-1149C9 November 1988(See 6.7)PERFORMANCE SPECIFICATIONGASKET MATERIALS, SYNTHETIC RUBBER,50 AND 65 DUROMETER HARDNESSThis specification is approved for use by all Departments and Agenciesof the Department of Defense.1. SCOPE1.1 Scope. This specifi
2、cation covers vulcanized synthetic rubbergasket materials of nominal 50 and 65 durometer hardness.1.2 Classification. Gasket materials are furnished in the followingtypes and classes, as specified (see 6.2).Type I - Nominal 50 durometer hardnessClass 1 - Oil resistant (chloroprene polymer)Class 2 -
3、Non-oil resistant (styrene-butadiene copolymer)Class 3 - Phosphate ester resistant (isoprene-isobutylenecopolymer)Class 5 - Fuel resistant (acrylonitrile-butadiene copolymer)Type II - Nominal 65 durometer hardnessClass 1 - Oil resistant (chloroprene polymer)Class 2 - Non-oil resistant (styrene-butad
4、iene copolymer)Class 3 - Phosphate ester resistant (isoprene-isobutylenecopolymer)Class 5 - Fuel resistant (acrylonitrile-butadiene copolymer)Beneficial comments (recommendations, additions, deletions) and any pertinentdata which may be of use in improving this document should be addressed to:Comman
5、der, SEA 03R42, Naval Sea Systems Command, 2531 Jefferson Davis Hwy,Arlington, VA 22242-5160 by using the self-addressed Standardization DocumentImprovement Proposal (DD Form 1426) appearing at the end of this document orby letter.AMSC N/A FSC 5330DISTRIBUTION STATEMENT A. Approved for public releas
6、e; distribution is unlimited.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1149D22. APPLICABLE DOCUMENTS2.1 General. The documents listed in this section are specified insections 3 and 4 of this specification. This section does not included
7、ocuments cited in other sections of this specification or recommended foradditional information or as examples. While every effort has been made toensure the completeness of this list, document users are cautioned that theymust meet all specified requirements documents cited in sections 3 and 4 ofth
8、is specification, whether or not they are listed.2.2 Government documents.2.2.1 Specifications, standards, and handbooks. The followingspecifications, standards, and handbooks form a part of this document to theextent specified herein. Unless otherwise specified, the issues of thesedocuments are tho
9、se listed in the issue of the Department of Defense Index ofSpecifications and Standards (DoDISS) and supplement thereto, cited in thesolicitation (see 6.2).STANDARDSDEPARTMENT OF DEFENSEMIL-STD-289 - Visual Inspection Guide for Rubber SheetMaterial.MIL-STD-298 - Visual Inspection Guide for Rubber E
10、xtrudedGoods.MIL-STD-407 - Visual Inspection Guide for Rubber MoldedItems.(Unless otherwise indicated, copies of the above specifications,standards, and handbooks are available from the Standardization Document OrderDesk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)2.3 Non-Governme
11、nt publications. The following documents form a partof this document to the extent specified herein. Unless otherwise specified,the issues of the documents which are DoD adopted are those listed in theissue of the DoDISS cited in the solicitation. Unless otherwise specified,the issues of documents n
12、ot listed in the DoDISS are the issues of thedocuments cited in the solicitation (see 6.2).AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)ASTM D 395 - Standard Test Methods for Rubber Property -Compression Set. (DoD adopted)ASTM D 412 - Standard Test Methods for Rubber Properties inTension. (DoD a
13、dopted)ASTM D 471 - Test Method for Rubber Property - Effect ofLiquids.ASTM D 573 - Standard Test Method for Rubber -Deterioration in an Air Oven. (DoD adopted)ASTM D 792 - Standard Test Methods for Specific Gravity(Relative Density) and Density of Plastics byDisplacement. (DoD adopted)ASTM D 2137 -
14、 Standard Test Methods for Rubber Property -Brittleness Point of Flexible Polymers andCoated Fabrics. (DoD adopted)ASTM D 2240 - Standard Test Method for Rubber Property -Durometer Hardness. (DoD adopted)ASTM F 104 - Standard Classification System for Non-Metallic Gasket Materials. (DoD adopted)(App
15、lication for copies should be addressed to the American Societyfor Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA19428-2959.)Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1149D3RUBBER MANUFACTURERS ASSOCIATION (RMA)Vend
16、ors Identification Guide for Molded and Extruded Goods.(Requests for copies should be addressed to the Rubber ManufacturersAssociation, Inc., 1400 K Street, NW, Washington, DC 20005.)2.4 Order of precedence. In the event of a conflict between the textof this document and the references cited herein,
17、 the text of this documenttakes precedence. Nothing in this document, however, supersedes applicablelaws and regulations unless a specific exemption has been obtained.3. REQUIREMENTS3.1 First article. When specified (see 6.2), a sample shall besubjected to first article inspection in accordance with
18、 4.2.3.2 Materials. The material shall be vulcanized rubber which meets therequirements specified herein. Asbestos and components containing asbestosare prohibited.3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should
19、be used tothe maximum extent possible provided that the material meets or exceeds theoperational and maintenance requirements, and promotes economicallyadvantageous life cycle costs.3.2.2 Used or rebuilt products. The use of used or rebuilt gasketmaterials is prohibited.3.2.3 Age. The age of the vul
20、canized rubber shall not exceed 12 monthsfrom the month in which it was cured to the date of acceptance by thepurchaser under the contract or order (see 4.3.2.2).3.3 Form. The gasket material shall be furnished in the form specified(see 6.2). The forms are sheets, strips with rectangular cross secti
21、on,shapes cut from sheets, molded shapes, and extruded shapes.3.3.1 Sheets. Sheet rubber shall be supplied in rolls that are 36 1inch wide. Length and thickness shall be as specified (see 6.2). Thicknesstolerances for sheet material shall be as specified in table I.Provided by IHSNot for ResaleNo re
22、production or networking permitted without license from IHS-,-,-MIL-PRF-1149D4TABLE I. Tolerances in width and thickness.Width Tolerance Thickness Tolerance(inches) ( inch) (inches) ( inch)Less than 1/16 1/100 Less than 1/16 1/1281/16 to 1/8, 1/64 Over 1/16 to 1/8, 1/64inclusive inclusiveOver 1/8 to
23、 1/2, 1/32 Over 1/8 to 1/2, 1/32inclusive inclusiveOver 1/2 to 1, 3/64 Over 1/2 to 1, 3/64inclusive inclusiveOver 1 to 2, 1/16 Over 1 1/16inclusive Over 2 3 percent ofwidth3.3.2 Strips. The strip rubber cross section dimensions shall be asspecified (see 6.2). Unless otherwise specified, tolerances i
24、n width andthickness shall be as specified in table I.3.3.3 Cut, molded, and extruded shapes. Cut, molded, and extrudedshapes shall have the form, dimensions, and tolerances as specified (see 6.2).3.4 Physical requirements. The gasket material shall be as specifiedin table II.Provided by IHSNot for
25、ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1149D5TABLE II. Physical requirements.Type I Type II Test procedureInitial properties:Tensile strength, lb/in 1000 1000 4.5.22(minimum)Ultimate elongation, percent 300 250 4.5.2(minimum)Hardness, durometer units 50 5
26、65 5 4.5.3Specific gravity, class 1 1.65 1.75 4.5.4(maximum)Specific gravity, classes 2,3, 1.55 1.65 4.5.4and 5 (maximum)Properties after oven aging:Tensile strength, percent 80 80 4.5.6of initial (minimum)Ultimate elongation, percent of 65 65 4.5.6initial (minimum)Hardness, Shore A 60 75 4.5.7durom
27、eter (maximum)Hot compression set, 75 75 4.5.8percent (maximum)Brittleness point no cracks no cracks 4.5.9Properties after immersion:Water extraction, percent 0.5 0.5 4.5.10(maximum)Oil resistance (for class 1 0 to +120 0 to +120 4.5.11only), percentPhosphate ester resistance 0 to +35 0 to +35 4.5.1
28、2(for class 3 only), percentFuel resistance (for class 5 0 to +60 0 to +60 4.5.13only), percentProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1149D63.5 Identification markings. Unless otherwise specified (see 6.2), thegasket material shall b
29、e marked as specified in this section, and shallindicate the Military specification number, type, class, and cure date(quarter and year). Sheet material marking shall be 1/2 inch high occurringevery 6 inches continuously across the sheet and recurring lengthwise every 4inches on one side only.3.5.1
30、Performance and legibility. Markings of rubber products shallnot rub off or be otherwise effaced by exposure to the elements, action offluids, oils, or environment to which the material is resistant (see 3.5.6),and contact to normal handling, shipment, and storage. Legibility of themarkings shall be
31、 such as required for readability and temporaryidentification. Permanent identification is preferred if it does not affectthe function of the product. The size of the symbols or letters shall becommensurate with the size of the product being marked.3.5.2 Deleterious effect. Marking of rubber product
32、s shall beaccomplished in a manner which shall not adversely affect the acceptabilityand function of the finished product.3.5.3 Exceptions. Only the part of the identification systems whichapplies to the individual requirements of the item specification is intendedto be used. Only one set of manufac
33、turers letters will be specified on oneitem. More than one color dash may be used to indicate resistance to morethan one environment. When more than one dash is used on one item, the orderin which the dashes appear should be the same as the order shown in table III. On small molded products, where t
34、he cross sectional diameter is not sufficientor functional surfaces do not permit marking in accordance with this standard,equivalent marking shall be placed on the containers in which the item ispackaged. Any exceptions to marking of the product itself are allowed only ifspecified. The exceptions s
35、hall be specified in either the applicable drawingor the item specification, as appropriate, or in both places.3.5.4 Marking. Marking shall be accomplished by molding or extruding(either recess or in relief) or by external application of a substance such aspaint, cement, or lacquer. The type marking
36、 and the marking material shall bespecified in the item specification so that critical surfaces are not damaged.3.5.5 Symbols and letters. The symbol and letter designationspublished in the Rubber Manufacturers Association “Vendors IdentificationGuide for Molded and Extruded Goods.“ shall be used wh
37、ere applicable. Thesize shall be consistent with the size of the part, but shall normally be inthe range of 1/16 to 1/8 inch (1.6 to 3.2 mm). The color shall be white orthe same as the color used to indicate resistance to environment listed intable III. When marking is accomplished by molding, the u
38、se of a coloredpaint, cement, or lacquer is not required.3.5.6 Colors for environmental resistance. The colors as specified intable III are to be applied as dashes approximately 1/16 inch (1.6mm) wide by1/4 inch (6.4mm) long and repeated at intervals of 10 inches (254mm) wheresize of product permits
39、.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1149D7TABLE III. Colors for environmental resistance.Color Resistant to environment ClassBlue Petroleum hydraulic fluid 5Brown Polar fluids (brake fluid) 3Green Weather (ozone) 1Gray Pneumatic
40、air (air and nitrogen) 2Orange (one dash) Low temperature (down to -40 F (-40 C) 2, 3Orange (two dashes) Arctic low temperature (down to -65 F (-53.4 C) 2Red Hydrocarbon fuel 5White Phosphate ester fluids 3Yellow Petroleum lubricating oil 53.5.7 Dating. Unless otherwise specified, the date of manufa
41、cturershall indicate the quarter of the calendar year and the year. For example,2Q-96 for the second quarter of 1996.3.6 Workmanship. Workmanship shall meet all the applicablerequirements of this specification. Surfaces shall be free of surface voids,tears, rips, cuts, and all foreign matter that ma
42、y affect the use of thefinished product (see 4.3.2.1).4. VERIFICATION4.1 Classification of inspections. The inspection requirementsspecified herein are classified as follows:(a) First article inspection (see 4.2).(b) Conformance inspection (see 4.3).4.1.1 Inspection conditions. Unless otherwise spec
43、ified (see 6.2), allinspections shall be performed under the conditions specified herein.4.2 First article inspection. First article inspection shall consistof the examinations and tests specified in table IV which shall be conductedon samples from (or representing) the first lot of material ordered
44、 fordelivery under a contract or order.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1149D8TABLE IV. First article inspection.Test Requirement Test methodDimensions:Width and length 3.3 4.3.2.1Thickness 3.3 4.3.2.1Tensile strength and Table
45、 II 4.5.2 and 4.5.6 ultimate elongationHardness Table II 4.5.3 and 4.5.7Specific gravity Table II 4.5.4Hot compression set Table II 4.5.8Brittleness point Table II 4.5.9Water extraction Table II 4.5.10Oil resistance Table II 4.5.11Phosphate ester Table II 4.5.12 resistanceFuel resistance Table II 4.
46、5.13Identification markings 3.5 4.3.2.1Workmanship 3.6 4.3.2.14.3 Conformance inspection. Conformance inspection shall be asspecified in table V. Samples to be tested shall be subjected to the group A,B, and C tests.Provided by IHSNot for ResaleNo reproduction or networking permitted without license
47、 from IHS-,-,-MIL-PRF-1149D9TABLE V. Conformance inspection.Test Requirement Test methodGroup A:Width and length 3.3 4.3.2.1Thickness 3.3 4.3.2.1Identification markings 3.5 4.3.2.1Workmanship 3.6 4.3.2.1Group B:Tensile strength and Table II 4.5.2 and 4.5.6ultimate elongationHardness Table IISpecific
48、 gravity Table II 4.5.9Brittleness point Table IIGroup C: 4.5.8Hot compression set Table II 4.5.10Water extraction Table II 4.5.11Oil resistance Table II 4.5.12Phosphate ester Table IIresistance 4.5.13Fuel resistance Table II4.5.3 and 4.5.74.5.44.3.1 Sampling.4.3.1.1 Lot. For the purposes of samplin
49、g for examinations and tests,a lot shall consist of one type and class of material of the same form anddimensions produced in one plant under essentially the same conditions, not toexceed 2,500 pounds, and offered for delivery at one time. In each case thenumber of pieces shall be the lot size.4.3.1.2 Sampling for examination of material. Samples shall be takenat random from each lot a
