1、A-A-52302 53 9999974 0064573 4 INCH-POUND A-A- 5 2 3 02 6 April 1992 COMMERCIAL ITEM DESCRIPTION GASKET, SPLIT INTEGRAL, FOR INLAND PETROLEUM DISTRIBUTION SYSTEM (IPDS) SNAP-JOINT COUPLING The General Services Administrationhas authorized the user of this commercial item description. Abstract. This
2、item description covers a synthetic rubber gasket for use with the 6-inch IPDC snap-joint coupling. a part of the coupling by manually pushing the protruding buttons into the holes provided in the coupling by hand. The gasket is intended for use with petroleum fuels. Two identical halves of this gas
3、ket are made to be Salient Characteristics. a. General. The split integral gasket shall be compatible for use with diesel fuels and jet fuels. The gasket shall be molded of synthetic rubber and shall be operable at temperatures from -31 OF to +160 OF at 740 psig. The gasket shall be composed of two
4、identical halves with each half being inserted into one coupling half of the IPDS snap-joint coupling. Each gasket half shall be capable of being installed securely into the coupling half gasket pocket without using any tool. The method of attachment shall allow removal and replacement of the gasket
5、 half in the coupling half under field conditions without the use of an adhesive or a special tool. The gasket shall have a minimum shelf life of 20 years when properly stored inside an unheated, covered warehouse such as in Sierra Army Depot, Herlong, California. Beneficial comments, recommendation
6、s, additions, deletions, clarifica- tions, etc., and other data which may improve this document should be sent by letter to: Commander, US Army Belvoir Research, Development, and Engineering Center, ATTN: STRBE-TSE, Fort Belvoir, VA 22060-5606. AMSC N/A FSC 5330 DISTRIBUTION STATEMENT A. Approved fo
7、r public release; distribution is unlimited. Licensed by Information Handling ServicesA-A-52302 53 7797974 OOb4574 b A-A- 5 2 3 O 2 Rubber properties. The physical properties of the synthetic rubber gasket shall meet or exceed the values of table I when tested in accordance with the ASTM standard te
8、st procedures shown. TABLE I. Physical Remirement of the Gasket and Correspondinq Test Methods Requirement ASTM Test Properties Values Method Original Properties Tensile Strength PSI (Minimum) 1600 D412 Ultimate Elongation, % (Minimum) 300 D412 Hardness, Shore A Durometer, Points 65 f 15 D2240 Prope
9、rties After Oven Aging for 46 Hours at 212 OF (100 f2 Oc) Tensile Strength Retained, % (Minimum) 80 0573 Ultimate Elongation Retained, % (Minimum) 80 D573 Hardness Change, Shore A, Points Maximum 10 D2240 Compression Set, % Maximum 40 D395 Properties After Immersion in ASTM Reference Fuel B for 70 H
10、ours at 73.4 OF (23 i2 OC) Tensile Strength Retained, % Minimum 45 D471 Elongation Retained, % Minimum 60 D471 Volume Change, % Maximum + 25 D471 Maximum Volume Change After Immersion in ASTM Reference Fuel B for 70 Hours at 73.4 OF (23 f2 OC) % Maximum 15 D471 Properties After Immersion in Type IV
11、Reagent Water for 166 Hours at 160 OF (70 f2 OC) Tensile Strength Retained, % Maximum 65 D471 Volume Change, % Maximum 35 D471 Low Temperature Properties after Conditioning for 70 Hours at -31 OF (-35 f2 OC) Compression Set, % Maximum 50 D1229 Torsional Stiffness Ratio, Maximum 10 D1053 Low Temperat
12、ure Properties after Extraction in Reference Fuel B for 70 Hours at 73 OF Dried and Cold Conditioning for 70 Hours at (-35 f2 OC) Compression Set, % Maximum 55 D1229 Toreional Stiffness Ratio, Maximum 10 D1053 2 Licensed by Information Handling ServicesA-A-52302 53 W 9999974 0064595 B A-A- 5 2 3 02
13、Lubricants. Lube or low temperature silicone grease such as Dow Cornings Molykote 55M shall be used as a lubricant for the gasket. package of 25 pairs of gasket halves shall be provided with a pint of Parkers Super-O-Lube lubricant or two 5.3 oz tubes of Dow Cornings Molykote 55M grease. High viscos
14、ity silicone oil such as Parkers Super- Each Quality assurance. following defects: The split integral gasket shall be examined for the 1. Gaskets not individually preserved, as specified. 2. Gaskets not consolidated, as specified. 3. Lubricant missing from the consolidated box. 4. Tests passed. 5. C
15、ertification provided. Teatina rewirements. The gasket shall be tested in a joint consisting of two pipes and one coupling which will be furnished by the Government. following deflection tests shall be performed to determine the suitability of gaskets as spares for the IPDS. The following deflection
16、 tests with the coupling joint located at the midspan of a 9-foot span shall be conducted. Deflection shall be measured in the vertical direction. not exceed 60 seconds. The Cycling time shall Pressure Temperature Deflection Number of Cvcles in inches to be Deflected 25 inches of Ambient 2.3 inches
17、HG vacuum (23 f5 OC) 5 900 psig (73 f2 OC) 2.1 inches 5 900 psig (-35 f2 OC) 2.1 inches 5 The manufacturer of a gasket who has already conducted the tests in this paragraph need not demonstrate the suitability of his gasket for use with the IPDS snap-joint coupling. Contractor certification. The con
18、tractor shall certify that the product offered to the Government meets the salient characteristics of this description and that the product conforms to the producers own drawings, specifications, Btandards, and quality assurance practices and is the same product as the manufacturers current product
19、offered by the contractor in the commercial marketplace for at least one year preceding the solicitation. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. 3 Licensed by
20、 Information Handling Services- A-A-52302 53 m 9999974 006459b T m A- A- 5 2 3 O 2 Metric Rroducts. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, provided they fall within specified tolerances using conversion tables c
21、ontained in the latest revisions of FED-STD-376, and all other requirements of this commercial item description are met. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch/pound units, a request should be made to the contracting officer
22、 to determine if the product is acceptable. The contracting officer has the option of accepting or rejecting the product. Preservation. Dackina. labelina. and markinq. The preservation, packing, labeling, and marking shall be as specified in the contract or purchase order. Notes. The contracting act
23、ivity should specify the inclusion of the following information : 1. Title, number and date of this item description. 2. Any special marking required. 3. Level of preservation, packaging and packing required. Copies of FED-STD-376 can be obtained from Standardization Documents Order Desk, 700 Robbin
24、s Avenue, Bldg. #4, Station D, Philadelphia, PA 19111-5094. Copies of all ASTMs can be obtained from the ASTM Committee, 1916 Race Street, Philadelphia, PA 19103. The following is a suggested source of supply for this item description (competition is not limited to this source): Victaulic Co. of Ame
25、rica, P.O. Box 31, Easton, PA 18044-0031 Preparing Activity: US Army Belvoir Research, Development, and Engineering Center, ATTN: STRBE-TSE, Fort Belvoir, VA 22060-5606. Custodian Army - ME Review activities Army - CE Navy - YD Air Force - 99 DLA - CS 4 Preparing activity Army - ME Project 5330-0856 Licensed by Information Handling Services
