1、 INCH-POUND MIL-PRF-2765E 27 September 2004 SUPERSEDING MIL-R-2765D 24 September 1986 PERFORMANCE SPECIFICATION RUBBER SHEET, STRIP, EXTRUDED, AND MOLDED SHAPES, SYNTHETIC, OIL RESISTANT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1
2、 Scope. This specification covers an oil-resistant type of synthetic rubber material for gaskets. 2. APPLICABLE DOCUMENTS 2.1 General. The documents 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 t
3、his 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 all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether o
4、r 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 specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicit
5、ation or contract. Comments, suggestions, or questions on this document should be addressed to Commander, Naval Sea 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
6、 Comment“. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil AMSC N/A FSC 5330 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-2765E 2
7、 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-289 - Visual Inspection Guide for Rubber Sheet Material. MIL-STD-298 - Visual Inspection Guide for Rubber Extruded Goods. MIL-STD-407 - Visual Inspection Guide for Rubber Molded Items. (Copies of these documents are available online at http:/assist.daps.dla.m
8、il/quicksearch or www.dodssp.daps.mil or from the Standardization 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
9、 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 - Procedures for Obtaining Health Hazard Assessments Pertaining to Operational Use of a Hazard
10、ous Material. (Copies of this document are available online at https:/bumed.med.navy.mil or from Bureau of Medicine and Surgery, 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 Submarin
11、e Atmosphere Control Manual. (Copies of this document are available from the Naval Sea Systems Command, Code SEA 05Z9, 1333 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 speci
12、fied herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL D 395 - Standard Test Methods for Rubber Property - Compression Set. (DoD adopted) D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastome
13、rs - Tension. (DoD adopted) D 471 - Standard Test Method for Rubber Property - Effect of Liquids. (DoD adopted) D 573 - Standard Test Method for Rubber - Deterioration in an Air Oven. (DoD adopted) D 792 - Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displ
14、acement. (DoD adopted) D 1229 - Standard Test Method for Rubber Property - Compression Set at Low Temperatures. (DoD adopted) D 2240 - Standard Test Methods for Rubber Property - Durometer Hardness. (DoD adopted) (Copies of these documents are available from www.astm.org or ASTM International, 100 B
15、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-2765E 3 RUBBER MANUFACTURERS ASSOCIATION Vendors Identification Guide for Molded and Extruded Goods. (Copies of this document ar
16、e available from www.rma.org or the Rubber Manufacturers Association, Inc., 1400 K Street, NW, Suite 900, Washington, DC 20005.) 2.4 Order of precedence. 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
17、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 subjected to first article inspection in accordance with 4.2. 3.2 Form. The synthetic rubber shall be fu
18、rnished in the form of sheets, strips, cut, extruded, or molded rubber material, as specified (see 6.2). 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the ma
19、terial meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Dimensions and tolerances. Dimensions and tolerances of material shall be as follows: 3.3.1 Dimensions. 3.3.1.1 Sheet and strip material. Unless otherwise specified (see
20、 6.2), dimensions of sheet and strip material shall be as follows: a. Sheet rubber shall be furnished in rolls between 35 to 42 inches wide and rolls shall weigh between 90 and 110 pounds. b. Strip rubber shall be furnished in lengths of 11 or 22 feet within a tolerance of plus or minus 10 percent.
21、3.3.1.2 Cut, molded and extruded material. The dimensions of cut, molded and extruded material shall be as specified (see 6.2). 3.3.2 Tolerances. Tolerances for cut, molded, and extruded material shall be as specified (see 6.2). Unless otherwise specified (see 6.2), tolerances for sheet and strip ma
22、terial shall be as specified in Tables I and II. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-2765E 4 TABLE I. Tolerance in width for sheet and strip material. Width Tolerance (plus or minus) 1/4 to 1/2 inch 1/32 inch Over 1/2 to 1 inch 3/
23、64 inch Over 1 to 2 inches 1/16 inch Over 2 inches 3 percent TABLE II. Tolerance in thickness for sheet and strip material. Thickness - inch Tolerance - inch (plus or minus) Less than 1/16 0.010 1/16 to 1/8 1/64 Over 1/8 to 1/2 1/32 Over 1/2 to 1 3/64 Over 1 1/16 3.4 Physical requirements. The synth
24、etic rubber material shall conform to the requirements specified in Table III. TABLE III. Physical requirements of rubber. Initial properties Requirement Tensile strength, 1b/in2 minimum 1000 Ultimate elongation, percent, minimum 300 Hardness, Type A durometer 35 to 55 Specific gravity, maximum 1.65
25、 Delamination, after liquid immersion No delamination Properties after oven aging Tensile strength, percent of initial, minimum 80 Ultimate elongation, percent of initial, minimum 70 Hardness, Type A durometer, maximum 60 Hot compression set, percent, maximum 40 Properties after oil-immersion Tensil
26、e strength, 1b/in2 minimum 1000 Ultimate elongation, percent, minimum 300 Volume change, percent, maximum (no shrinkage allowed) plus 25 Low temperature properties Hardness Type A durometer, maximum 60 Cold compression set, before and after oil immersion Percent, maximum, 10 seconds after release 75
27、 Percent, maximum, 30 minutes after release 35 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-2765E 5 3.5 Identification. Unless otherwise specified (see 6.2), the synthetic rubber material shall be marked with rows of constantly recurring y
28、ellow symbols identifying the product as oil resistant. Markings shall be as specified in paragraphs 3.5.1 through 3.5.7. Material supplied under this specification shall be identified as specified in paragraphs 3.5.1 through 3.5.7. Material shall be marked with a yellow color. Marking shall be done
29、 with a permanent marking material. 3.5.1 Performance and legibility. Markings of rubber products shall be such as to not rub off or be otherwise effaced by exposure to the elements, action of fluids, oils or environment to which the material is resistant (see 3.5.6), and contact to normal handling,
30、 shipment, and storage. Legibility of the markings shall be such as required for readability and temporary identification. Permanent identification is preferred if such does not affect the function of the product. The size of the symbols or letters shall be commensurate with the size of the product
31、being marked. 3.5.2 Deleterious effect. Marking of rubber products shall be accomplished in a manner which shall not adversely affect the acceptability and function of the finished product. 3.5.3 Exceptions. Only the part of the identification systems which applies to the individual requirements of
32、the item specification is intended to be used. Only one set of manufacturers letters will be specified on one item. More than one color dash may be used to indicate resistance to more than one environment. When more than one dash is used on one item, the order in which the dashes appear should be th
33、e same as the order shown in 3.5. On small molded products, where the cross sectional diameter is not sufficient or functional surfaces do not permit marking in accordance with this standard, equivalent marking shall be placed on the containers in which the item is packaged. Any exceptions to markin
34、g of the product itself is allowed only if specified. The exceptions shall be specified in either the applicable drawing or the item specification, as appropriate, or in both places. 3.5.4 Marking. Marking shall be accomplished by molding (either recess or in relief) or by external application of a
35、substance such as paint, cement or lacquer. The type marking and the marking material shall be specified in the item specification so that critical surfaces are not damaged. 3.5.5 Symbols and letters. The symbol and letter designations published in the Rubber Manufacturers Association “Vendors Ident
36、ification Guide for Molded and Extruded Goods“ shall be used where applicable. The size shall be consistent with the size of the part, but shall normally be in the range of 1.6 to 3.2 mm (1/16 to 1/8 inch). The color shall be yellow. When marking is accomplished by molding, the use of a colored pain
37、t, cement, or lacquer is not required. 3.5.6 Colors and shape for environmental resistance. The colors indicated in 3.5 are to be applied as dashes approximately 1.6mm (1/16 inch) wide by 6.4mm (1/4 inch) long and repeated at intervals of 254mm (10 inches) where size of product permits. 3.5.7 Dating
38、. Unless otherwise specified, the date of manufacture shall indicate the quarter of the calendar year and the year. For example, 2Q-97 indicates the date of manufacture was the second quarter of 1997. 3.6 Workmanship. The workmanship shall be such as to meet all applicable requirements of this speci
39、fication and the rubber shall be free of surface voids, tears, rips, cuts and free from all foreign matter that may affect the use of the finished products. 3.7 Off-gassing. The gasket material shall meet the requirements in the Nuclear Powered Submarine Atmosphere Control Manual, S9510-AB-ATM-010 R
40、ev 2 of 30 July 1992, for a usage category of Limited (see 4.6 and 6.4). 3.8 Toxicity. The gasket material shall have no adverse effect on the health of personnel when used for its intended purpose. The gasket material shall be assessed by the Navy Environmental Health Center (NAVENVIRHLTHCEN) using
41、 the administrative Health Hazard Assessment (HHA). A flowchart for this process Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-2765E 6 can be found as enclosure (1) of BUMEDINST 6270.8. The HHA is a review of the gasket material based on in
42、formation submitted by the manufacturer, to assess health hazards associated with the handling, application, use and removal of the product. The gasket material shall not cause any environmental problems during waste disposal (see 4.7 and 6.5). 4. VERIFICATION 4.1 Classification of inspections. The
43、inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First article inspection. First article inspection shall consist of the examinations of 4.4 and the tests specified in 4.5, 4.6 and 4.7. 4.2.1 Sampling
44、for first article inspection. Sufficient first article samples shall be taken from the first production lot and tested as specified in 4.2. 4.3 Conformance inspection. Conformance inspection shall consist of the examinations of 4.4 and tests as specified in 4.5.1, 4.5.2, and 4.5.3. 4.3.1 Sampling fo
45、r quality conformance. 4.3.1.1 Lot. For purposes of sampling, examination and tests, a lot shall consist of not more than 2500 pounds of material of the same form and dimensions, produced in one plant under essentially the same conditions and offered for delivery at one time. In each case, the numbe
46、r of pieces shall be the lot size. 4.3.1.2 Sampling for examination. For the examination specified in 4.4, representative samples from different portions of each lot shall be selected as specified in Table IV. TABLE IV. Sampling for visual and dimensional examination. Lot size Sample size Accept Rej
47、ect 1 2 3 1 to 15 all 0 1 16 to 25 15 0 1 26 to 90 25 0 1 91 to 150 35 0 1 151 to 280 40 0 1 281 to 500 50 0 1 501 to 1200 65 0 1 1201 and over 80 0 1 1 All defective items shall be replaced with acceptable items prior to lot acceptance. 2 Inspect sample size until reject criteria is reached. If rej
48、ect criteria is reached, the entire lot shall be rejected. 3 Reject lots may be screened and resubmitted for inspection and test. 4.3.1.3 Sampling for tests. Four sets of samples shall be taken at random from those selected in 4.3.1.2 in sufficient quantity to conduct the quality conformance tests a
49、s specified in 4.5 as applicable. If the items are of such size or shape that test specimens cannot be prepared from them, substitute samples shall be provided as molded specimens or in the form of pieces of rubber having dimensions appropriate to the tests required. The Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-2765E 7 substitute samples shall be certified to be of the same material and e
