1、_ A-A-59239 9038054 0000589 672 INCH-POUND A-A-59239 12 May 1998 SUPERSEDING MIL-D-20550B S August 1968 COMMERCIAL ITEM DESCRIPTION DIATOMACEOUS EARTH The General Services Administration has authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This commercial it
2、em description (CID) covers the requirements for diatomaceous earth which is intended for use in chemical manufacturing as an inert filler and as a filter aid in filtration and purification processes. Grades B and C are also used in the formulations of pyrotechnic igniters as burning rate modifiers.
3、 This material is not intended for use in water purification equipment for field use or in paint as a pigment or filler. 2. CLASSIFICATION. This diatomaceous earth shall be of the following grades. The grade to be furnished shall be as specified (see 7.2). Grade A - Natural Grade B - Flux calcined G
4、rade C - Calcined Beneficial comments, recommendations, additions, deletions, clarifications, etc., and any data which may improve this document should be sent to: Defense Supply Center Richmond, ATTN: DSCR-VBD, SO00 Jefferson Davis Highway, Richmond, VA 23297-56 1 O. AMSC N/A FSC 9390 DI STFBUTION
5、STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesA-A- 5 923 9 3. SALIENT CHARACTERISTICS 3.1 General reauirements. The diatomaceous earth shall meet the requirements as specified in table I. TABLE I. Performance requirements. Requirement P
6、ercent SiOz on a dry basis (min) Fineness (retained on a No. 150 US std. sieve) percent (max) Fineness (retained on a No. 325 US std. sieve) percent (ma) Ignition Loss (corrected for moisture) percent (ma) Moisture percent (ma) Oil absorption (min) oil absorption (ma) Grade 230 I 210 I 210 t Test me
7、thod ASTM D717 ASTM C430 ASTM C430 ASTM D1208 _I ASTM D1483 ASTMD1483 I 4. REGULATORY REQUIREMENTS 4.1 Recvcled. recovered. or environmentally Preferable materials. Recycled, recovered, or environmentaily preferable materials should be used to the maximum extent possible provided that the material m
8、eets or exceeds the operational and maintenance requirement, and promotes economically advantageous life cycle costs. 4.2 Environmental protection. The item shall meet all applicable Environmental Protection Agency restrictions in effect on the date of the contract. These regulations apply to the em
9、ission of materials hazardous to the environment or the users health and shall be met during the manufacturing, service, transportation, storage, and operatioduse of the item. 5. QUALITY ASSURANCE PROVISIONS 5.1 Product conformance. The products provided shall meet the salient characteristics of thi
10、s commercial item description, conform to the producers own drawings, specifications, standards, and quality assurance practices, and be the same product offered for sale in the commercial market. The government reserves the right to require proof of such conformance. 6. PACKAGING. Preservation, pac
11、king, and marking shall be as specified (see 7.2). 2 Licensed by Information Handling ServicesA-A-59239 903B054 0000593 220 .I A-A-59239 7. NOTES 7.1 Sources of documents. 7.1.1 Government documents. Copies of Military and Federal documents may be obtained from the Superintendent of Documents, U.S.
12、Government Printing Offke, Washington, DC 20402. 7.1.2 Industrv standards. Copies of industry standards referenced in this CID may be obtained from the following address: American Society for Testing and Materiais (ASTM) ASTM C430 Fineness of Hydraulic Cement by the 45-mu m (No. 325) Sieve ASTM D717
13、 Analysis of Magnesium Silicate Pigment ASTM D1208 Common Properties of Ceriah Pigments ASTM D1483 Oil Absorption of Pigments by Gardner-Coleman Method Applications for copies should be sent to the American Society for Testing and Materiais, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. 7
14、.2 Ordering data. Acquisition documents must speciQ the following: a. Title, number, and date of this document. b. Grade of diatomaceous earth required (see 2). c. Preservation, packing, and marking shall be as specified (see 6). 7.3 Pari identification number (PIN) . The following part identificati
15、on numbering procedure is for Government purposes and does not constitute a requirement for the contractor. AA5 923 9-X II I Grade: 1 - Grade A (Natural) 2 - Grade B (Flux Calcined) 3 - Grade C (Calcined) 3 Licensed by Information Handling Services A-A-59239 9018054 0000592 167 A-A- 5 923 9 MILITARY INTERESTS: Custodians Army-AL Air Force - 99 PREPARING ACTIVITY: DLA - GS (Project 9390-0006) Reviewers Air Force - 84 4 Licensed by Information Handling Services
