1、MIL-P-82744 (OS) 22 November 1985 SWWrnING WS22914 15 February 1984 MILITAIU? SPECIFICATION (CODE IDENT 53711) PACKING, Pm=, CIITO FUEL CWATIBLE, SPECIFICATION FOR This specification is approved for use within the Naval Sea Systems Command (OS) , Department of the Navy, and is available for use by a
2、ll Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This cification covers standard requirements for construction and testing of Otto fuel compatible preformed packing for use in torpedo fuel tanks and fuel delivery systems. 2. APPLICABLE DOCUMENTS 2.1 Government documents.
3、 2.1.1 mifications and standards. “he following specifications and standards, form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standa
4、rds . (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS MILITARY MIL-B-121 - Barrier Material, Greaseproofed, Waterproofed, Flexible MIL-P-4861 - Packing, Preformed, Rubber, Packaging of MIL-0-82672 - Otto Fuel II Beneficial comments (recommendations, additions, deletions) a
5、nd any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Ordnance Station, Standardization/Docuntation Division (Code 524), Indian Head, MD. 20640-5000, by using the self-addressed Standardization Improvement Proposal (DD Form 1426) appea
6、ring at the end of this document or by letter. “. -“I“- AMSC: N/A FSC 5330 DISTRIBUTION - STATMEN“ A. Approved for public release; distribution is unlimited. THIS DOCUMENT CONTAINS /d PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-82744
7、53 W 7779706 OLL0979 O m - MIL-P-82744 (Os) MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipnt and Storage MIL-STD-413 - Visual Inspection Guide for Elastomeric *Rings Attributes (Copies of specifications, standards, handbooks, drawings, publicat
8、ions, and other Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity). 2.2 Other publications. The following documents form a part of this specification to the extent
9、 specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS shall be the issue of the non- government docu
10、ments which is current on the date of the solicitation. Asm AS94 D 395 - Rubber Property-Compression Set-Standard Test Methods for ASlM .D 412 - Rubber Properties in Tension, Standard Test Methods for . ASP4 D 573 - FLhber-Eterioration in an Air Oven, Standard Test Methods ASTM D 2137 - Rubber and R
11、ubber-Coated Fabrics, Brittleness Temperature AS?M D 2240 - Rubber Property-Durometer Hardness, Standard Test Methods for by Impact, Standard Test Methods for for (Applications for copies should be addressed to Mm, 1916 Race Street, Philadelphia, Pa. 19103). (Nongovernment standards and other public
12、ations are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services) . 2.3 Order of precedence. In the event of a conflict between the -text of this specification and the r
13、eferences cited herein, (except for associated detail specifications, specification sheets or PIS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 2
14、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-P-827q4 53 m 7777706 OLLLOOO I m MIL-P-82744 (OS) 3. REQUIIZEMENTS 3.1 Qualification. Preformed packing furnished under this specification shall be products which are authorized by the qualifying
15、activity for listing on the applicable qualified products list at the time set for opening of bids (see 4.4.2 and 6.3). 3.2 Material. Preformed packing shall be a campound of ethylene propylene rubber, formulated, mixed, and cued as necessary to meet the requirements of 3.4. 3.3 Dimensions and toler
16、ances. The dimensions and tolerances shall conform to the dimensional requirements of the applicable NAVSEA drawings. 3.4 Physical properties. The physical properties of the cured rubber shall conform to the values given in Table I. TABLE I. HYSICAL PFOPEKCIES Low Temperature Brittleness when expose
17、d No sign of : to -40 F (-4OO C) Brittleness 3.4.1 Otto fuel compatibility. !Che molded preformed packing shall not exhibit degradation by exposure to Otto Fuel II. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-82744 (E) 3.5 Workmanship. Th
18、e preformed packing shall be of uniform quality, clean and free from foreign inaterials, and free from defects detrimental to the fabrication, appearance or performance of parts in service in accordance with MIL-STD-413 4. QUALITY ASSURANCE PRMlISIONS 4.1 Responsibility for inspection. Unless otherw
19、ise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as spcified herein. Except as otherwise s,uecified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance
20、of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.
21、1.1 Responsibility for compliance. All items must met all requirements of sections 3 and 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 re
22、lieve the contractor of the responsibility of assuring that all-products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor doe
23、s it commit the Government to acceptance of defective material. 4.2 Classification “I“ of inspections. Tne inspection requirements specified herein are classified as follows: a. Quglification inspection (see 4.4) b. Quality conformance inspection (see 4.5) 4.3 Inspection conditions. Unless otherwise
24、 specified, all inspections shall be performed in accordance with the test conditions specified in 4.4, 4.5, 4.5.2 and 4.5.3. .- 4.4 Qualification inspection. 4.4.1 Sample. Test samples shall consist of twenty (20) preformed packings (1.5 to 3 inch inside diameter by .O70 inch cross section diameter
25、) manufactured from a single batch tested in accordance with 4.7. 4.4.2 Qualification inspection. Qualification inspection consists of all the tests specified in 4.10, and shall be performed at a laboratory acceptable to the Government (see 6.3) on sample units produced with equipment and pro- cedur
26、es normally used in production. Data for the tests of 4.7 shall be included with the samples. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIGP-82744 (06) 0 be as specified in TabAe II. 4.5 Quality conformance inspection. Quality conformance ins
27、pection shall TABLE II. QUALITY CONEC)l?MAEE INSPEICTION INsPrnIoN Group A Dimensions and tolerances Otto fuel compatibility, Workmanship Group B Durometer hardness Tensile strength Ultimate elongation Compression set Low temperature brittleness Resistance to heat aging Group C Not applicable i I rn
28、UIREMEN!C PARAGWH TEST PARAGRAPH a I l 4.5.2.2, 4.10.2 I J - 1/ All requirements not covered by tests 4.5.1 Inspection of materials and components. The supplier is responsible for insuring that materials and components used were manufactured, tested, and inspected in accordance with referenced subsi
29、diary specifications and standards to the extent specified or if none, in accordance with this specification (see 4.1). In the event of conflict, this specification shall govern. Inspection records shall be kept complete and available to the procuring activity at all times. 4.5.2 Sampling for Group
30、A inspection. Inspection of the end item shall be in accordance with Table II, Table III, and Acceptable Quality Levels (AQL) set forth herein. The lot size, for the purpose-of determining the sample size in accordance with MIGSTD-105, shall be expressed in units of preformed packing. 4.5.2.1 mamina
31、tion for defects in appearance and mrkmanship. The examination shall be in accordance with MIGSTD-413. The sample size shall be - in accordance with MIL-STD-105, Inspection Level II, AQLd.0. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE III
32、. CLASSIFICATION OF DEFECIS Cr it ical Major 101 102 103 104 105 106 107 108 DEFECT Not compatible with Otto Fuel II Durometer hardness does not meet test requirements Tensile strength not as specified in Table I Ultimate elongation not as specified in Table I Compression set not as specified (see 3
33、.4) Dimensions not in accordance with applicable NAVSEA Law temperature brittleness not in accordance with Not resistant to heat aging Workmanship not in accordance with MIL-STD-413 drawings Table I 4.5.2.2 Faamination for dimensional defects. The examination shall be made to the tolerances as speci
34、fied in the applicable NAVSEA drawing. Sampling shall be in accordance with MIL-ST)-105, Inspection Level II, AQL = 1.0. 4.5.2.3 Otto fuel compatibility inspection. Sample for Otto fuel compatibility quality conformance shall be as specified by MIL-STD-105 and as required by 4.10.1.1. 4.5.3 Sampling
35、 for Group B inspection. Sample for batch testing shall be as specified by MIL-STD-105 and as required by 4.9.1. The samples shall be cured however, final acceptance and shipment shall be withheld until the Group A and B inspection has shown that the corrective action was successful. In the event of
36、 failure after reinspection, information concerning the failure shall be furnished to the cognizant inspection activity and the qualifying activity. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-82744 (OS) 4.5.4 Examination for defects in p
37、ackaging. An examination shall be made to determine that packaging, packing, and markings comply with Section 5. The sample unit for this examination shall be one shipping container fully packed, selected just prior to the closing operation. Shipping containers fully prepared for delivery shall be e
38、xamined for closure defects in accordance with Table IV. TABLE IV. DFZECTS IN PACKAGING Packaging Pack ing Count Weight - Markings DEFECT I Not the level specified. 1/ Not packaged in accordance with Section 5 Packaging material, closures not as specified Not level specified, not in accordance with
39、contract requirements Container not as specified, closures not accqlished by specific or required methods or materials Any nonconforming compnent, component missing, damaged or otherwise defective I affecting serviceability Inadequate application of components, such as incomplete closure of case lin
40、ers, containing flaps loose or inadequate strapping, bulged or distorted containers Less than specified quantity Gross weight exceeds specified requirements Interior or exterior markings, as applicable, omitted, illegible, incorrect, incomplete or not in accordance with contract requirements. Date o
41、f cure, storage instruction missing. “_I_“-_ “ “- I “_y - 1/ The sample size shall be in accordance with MIL-STD-105, Inspection Level II, AQG2.5. 4.6 Retention of qualification. To retain qualification, the contractor shall forward a re,prt at 36-month intervals to the qualifying activity. The qual
42、ifying activity shall establish the initial re,oorting date. The report shall consist of: a. A summary of the results of the tests performed for inspection of poduct for delivery (Groups A and B), indicating as a minimum the number of lots that have passed, the number that have failed, and the group
43、 which they failed. The results of tests of all reworked lots shall be identified and accounted for. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-827LlLl 53 m 777770b Olll005 O M MIL-P-82744 (OS) b. Failure to submit the report within 30 d
44、ays after the e,pd of each 36 mnth period may result in loss of qualification for the product. In addition to the periodic submission of inspection data, the contractor shall inmediately notify the qualifying activity at any time during the 36-mnth period that the inspection data indicates failure o
45、f the qualified product to meet the requirements of this inspection. c. In the event that m production occurred during the reporting period, a report shall be submitted certifying that the company still has the capabilities and facilities necessary to produce the item. If during tm consecutive repor
46、ting periods there has been no production, the manufacturer may be required, at the discretion of the qualifying activity, to submit his qualified products to testing in accordance with the qualification inspection requirements and to state the reason for no production. 4.7 Quality conformance tests
47、. The following tests shall be conducted on each batch of material. Original Properties Durometer hardness Canpression set Tensile strength Taw temperature brittleness Ultimate elongation Wsistance tm heat aging 4.7.1 Rejection criteria. A lot shall be rejected upon the failure of any sample to meet
48、 the test requirements specified herein. A lot that has been rejected may be reworked to correct the deficiencies and resubmitted for inspection. Lots are reworked by replacing defective preformed packings (configuration defects) with acceptable packing. IAts represented by a sample of preformed pac
49、king which failed to meet Otto fuel compatibility test requirements shall not be reworked. 4.8 Test conditions. Unless otherwise specified in the test procedure, all tests and examinations shall be performed at the following ambient conditions: a. Tenp?erature 77O + 18% b. Barometric pressure 30 +-2 inches of mercury c. Relative humidity Room ambient, 90% maximuIn 4.9 Test procedures. Test samples from each batch sha
