1、 INCH-POUND MIL-DTL-22050E (SH) 30 November 2004 SUPERSEDING MIL-G-22050D (SH)7 May 1993 DETAIL SPECIFICATION GASKET AND PACKING MATERIAL, RUBBER, FOR USE WITH POLAR FLUIDS, STEAM, AND AIR AT MODERATELY HIGH TEMPERATURES This specification is approved for use by the Naval Sea Systems Command, Depart
2、ment of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.l Scope. This specification covers rubber gaskets, packing, seals, strips, molded forms, and sheet material for use in hot air, hot water, steam, and various polar fluids such as aqueo
3、us monoethanolamine (MEA), at moderately high temperatures (see 6.1). 1.2 Classification. The rubber gasket and packing material are of the following grades, as specified (see 6.2). Grade 1 - Nominal 65 durometer hardness. Grade 2 - Nominal 80 durometer hardness. Grade 3 - Nominal 90 durometer hardn
4、ess. 1.2.1 O-ring identification. Unless otherwise specified (see 6.2), o-rings are identified by a part identifying number (PIN) consisting of the specification designator (M22050); followed by a hyphen and the grade designator (1, 2, or 3); followed by another hyphen and the SAE AS 568 dash number
5、 for size designation. (Example: M22050-2-236). 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 this specification or recommended for additional in
6、formation 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 or not they are listed. Comments, suggestions, or q
7、uestions 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 Comment“. Since contact information can chang
8、e, 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 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-22050E (SH) 2.2 Government documents. 2.2.1 Sp
9、ecifications, 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 solicitation or contract. FEDERAL STANDARDS FED-STD-601 - Rubber
10、: Sampling and Testing. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-M-23573 - Monoethanolamine Chelating Agent Solution. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-289 - Visual Inspection Guide for Rubber Sheet Material. MIL-STD-407 - Visual Inspection Guide for Rubber Molded Items. MIL-STD-413 - Visual I
11、nspection Guide for Elastomeric O-Rings. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government docume
12、nts, drawings, and publications. The following 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. DEPARTMENT OF LABOR Code of Fe
13、deral Regulations (CFR) 40 CFR 261 - Identification and Listing of Hazardous Waste. (Copies of these documents are available online at www.access.gpo.gov/nara/cfr or from the Superintendent of Documents, U.S. Government Printing Office, North Capitol & “H” Streets, N.W., Washington, DC 20402-0002.)
14、BUREAU OF MEDICINE AND SURGERY (BUMED) BUMED INST 6270.8 - Procedures for Obtaining Health Hazard Assessments Pertaining to Operational Use of a Hazardous Material. (Copies of this document are available online at https:/bumed.med.navy.mil or from Bureau of Medicine and Surgery, Department of the Na
15、vy, 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 Submarine Atmosphere Control Manual. (Copies of this document are available from the Naval Sea Systems Command, Code SEA 05Z9, 1333 Isaac Hull Avenue, SE, St
16、op 5133, Washington Navy Yard DC 20376-5133.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-22050E (SH) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise
17、 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 Elastomers - Tension. (DoD adopted) D
18、 471 - Standard Test Method for Rubber Property - Effect of Liquids. (DoD adopted) D 512 - Standard Test Methods for Chloride Ion in Water. (DoD adopted) D 573 - Standard Test Method for Rubber - Deterioration in an Air Oven. (DoD adopted) D 2240 - Standard Test Method for Rubber Property - Duromete
19、r Hardness. (DoD adopted) D 3767 - Standard Practice for Rubber - Measurement of Dimensions. (DoD adopted) (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.) SAE INTERNATIONAL AS 568 - Aerospace Siz
20、e Standard for O-Rings. (DoD adopted) (Copies of these documents are available from www.sae.org or the SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, th
21、e 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 Material. The material shall be made from an ethylene-propylene elastomeric compound that will meet the applicabl
22、e requirements specified herein. Suggested formulations are given in 6.4 for both grade 1 and grade 2 material. The material shall contain no low melting point metals such as mercury, lead or antimony used in either the formulation or preservation and packaging materials. 3.2 Form. The material shal
23、l be furnished in the form of sheets, strips, gaskets, packings, seals, or molded items of the sizes specified (see 6.2). 3.2.1 O-rings. Unless otherwise specified (see 6.2), the required o-ring shall be identified by its PIN (see 1.2.1) and shall have the dimensions and tolerances in accordance wit
24、h the requirements of the SAE AS 568 dash number in its PIN. 3.3 Physical requirements of the rubber. The rubber compound used in the gaskets and packing material shall conform to the applicable requirements in Table I when tested as specified herein. 3 Provided by IHSNot for ResaleNo reproduction o
25、r networking permitted without license from IHS-,-,-MIL-DTL-22050E (SH) TABLE I. Physical requirements of rubber compounds. Grade 1 Grade 2 Grade 3 Initial properties: Tensile strength, psi, minimum (min) 2400 2400 2200 Ultimate elongation, percent, min. 250 150 80 Hardness, Shore A durometer, point
26、s within 1 sec 65 + 5 80 + 5 90 + 5 Leachable chlorides (parts per million) maximum (max) 200 200 200 Properties after oven aging 166 Hours at 280 degrees Fahrenheit (oF)Tensile strength, percent of initial, min. 70 70 70 Ultimate elongation, percent of initial, min. 70 70 50 Hardness, change in Sho
27、re A durometer, points max. 15 15 15 Compression set, percent, max. 60 60 35 Properties after immersion in distilled water for 166 hours at 330oF: Tensile strength, percent of initial, min. 80 80 80 Ultimate elongation, percent of initial, min. 80 80 80 Volume change, percent (no shrinkage allowed)
28、0 to 10 0 to 10 0 to 10 Properties after immersion in 25 percent aqueous solution of MEA for 166 hours at 330oF: Tensile strength , percent of initial, min. 80 80 - Ultimate elongation, percent of initial, min. 80 80 - Volume change, percent (no shrinkage allowed) 0 to 10 0 to 10 - Properties after
29、166 hours in steam at 330oF: Tensile strength, percent of initial, min. 80 80 80 Ultimate elongation, percent of initial, min. 80 80 80 Volume change, percent, max. 5 5 5 Properties after 70 hours in steam at 390oF: Tensile strength, percent of initial, min. - - 90 Ultimate elongation, percent of in
30、itial, min. - - 85 Hardness, change in Shore A durometer, points max. - - 3 Volume change, percent (no shrinkage allowed) - - 0 to 8 Compression set, percent, max. - - 60 Properties after 166 hours in steam at 550oF: Tensile strength, percent of initial, min. - - 75 Ultimate elongation, percent of i
31、nitial, min. - - 15 Hardness, change in Shore A durometer, points max. - - 10 Volume change, percent (no shrinkage allowed) - - 0 to 5 Compression set, percent, max. - - 90 3.4 Identification. Material acquired under this specification shall be identified with white markings. A permanent marking mat
32、erial that will have no deleterious effect on the rubber shall be used or in the case of individual one-item packaging, the marking may be put on the package. 3.5 Workmanship. The material shall be examined for defects as specified herein. 4 Provided by IHSNot for ResaleNo reproduction or networking
33、 permitted without license from IHS-,-,-MIL-DTL-22050E (SH) 3.6 Recycled, 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 mai
34、ntenance requirements, and promotes economically advantageous life cycle costs. 3.7 Toxicity. When evaluated in accordance with 4.5, the gasket and packing material shall have no adverse effect on the health of personnel when used for its intended purpose and shall not cause any environmental proble
35、ms during waste disposal (see 4.5 and 6.6). 3.8 Disposal. The manufacturer shall certify that the gasket and packing material shall not contain any hazardous material or exhibit any hazardous characteristic as defined under 40 CFR 261 (Code of Federal Regulations). The manufacturer shall make every
36、effort to adhere to this requirement. If no product which meets this requirement can be identified, (i.e., if the gasket and packing material does contain a hazardous material), the manufacturer shall provide information detailing proper disposal of the gasket and packing material. 3.9 Off-gassing.
37、The gasket and packing material shall meet the requirements in the Nuclear Powered Submarine Atmosphere Control Manual, NAVSEA Technical Manual S9510-AB-ATM-010 Rev 2, for a usage category of Limited (see 4.6 and 6.7). 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements sp
38、ecified herein are classified as follows: a. Conformance inspection (see 4.2) 4.2 Conformance inspection. Conformance inspection shall consist of the examinations and tests specified in 4.3. 4.2.1 Lot. For the purpose of conformance inspection and testing, a lot is defined as all the material produc
39、ed in one facility, using the same materials, of the same grade, using the same production processes, not exceeding 1000 pounds, and being offered for delivery at one time. 4.2.2 Sampling for conformance inspection. As a minimum, the contractor shall randomly select a sample quantity of test specime
40、ns as defined in 4.2.3 from each lot of completed material in accordance with Table II and inspect them in accordance with the examinations and test specified herein. If one or more defects are found in any sample, the entire lot shall be rejected. The contractor has the option of screening 100 perc
41、ent of the rejected lot for the defective characteristic(s) or providing a new lot which shall be inspected in accordance with the sampling plan contained herein. The contractor shall maintain for a period of three years after contract completion records of inspections, tests, and any resulting reje
42、ctions. TABLE II. Sample size for conformance inspections and tests. Lot size number of gaskets, molded items, packings, or unit areas of sheets or strips Sample size number of gaskets, molded items, packings, or unit areas of sheet or strips 2 to 50 51 to 90 91 to 150 151 to 280 281 to 500 501 to 1
43、200 1201 to 3200 3201 and over 5 7 11 13 16 19 23 29 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-22050E (SH) 4.2.3 Sampling for tests. Representative samples shall be taken at random from each lot that passes the examination of 4.3.1, i
44、n sufficient quantity to conduct the conformance tests specified in 4.3.2. If the items are of such size or shape that test specimens cannot be prepared form the, substitute sample shall be provided in the form or a piece or pieces of rubber having dimensions appropriate to the tests required. The s
45、ubstitute samples shall be certified by the contractor to be of identical material and equivalent cure to that used in the lot of finished material offered for delivery. 4.3 Examinations and tests. 4.3.1 Visual and dimensional examination. Each of the samples taken in accordance with 4.2.2 shall be
46、subjected to surface examinations for identification, workmanship, dimensions, and tolerances. MIL-STD-289, MIL-STD-407, or MLD-STD-413, as applicable to the product type, shall be used to determine and evaluate visual defects. The dimensions shall be determined in accordance with the applicable met
47、hod specified in ASTM D 3767. 4.3.2 Conformance tests. Conformance tests shall be conducted on samples selected in accordance with 4.2.4. Conformance tests shall consist of the examination and tests specified in 4.4 (see 6.3). 4.3.3 Action in case of nonconformance. If any of the samples in the conf
48、ormance tests are found not to be in conformance with the requirements of the specification, the lot which they represent shall be rejected. 4.4 Test methods. 4.4.1 Testing conditions. Unless otherwise specified herein, the testing shall be conducted at a temperature of 80o+ 9oF. 4.4.2 Tensile prope
49、rties. The tensile strength and ultimate elongation shall be determined by ASTM D 412. Die III specimens that are 0.080 and + 0.010 inch thick shall be used for determinations of tensile properties. 4.4.3 Hardness. Hardness shall be determined with a Shore A durometer on specimens that are 0.500 + 0.010 inch thick and at least 1.129 inch diameter, in accordance with ASTM D 2240. The hardness readings shall be taken within
