1、-a a MIL-S-52333B 46 7777706 0217265 7 -_ - MIL-S-52333B 4 January 1984 SUPERSEDING MIL-S-52333A 19 January 1970 MILITARY SPECIFICATION SLEEVES, FILTER ELEMENT; WATER PURIFICATION UNITS 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 three sizes of filter element sleeves for diatomite-type filters. 1.2 Classification. The filter element sleeves shall be of the following sizes : Size - 1 2 3 Amlication Water purification unit, trailermounted, 600 gph Water purification units: (1) Van-type body-mou
3、nted, 1,500 and (2) Base-mounted, 3,000 gph Water purification unit, 420 gph 3,000 gph 1.2.1 Part number. Specification part numbers for item described in this specification will be formulated as shown in paragraph 6.7. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and stand
4、ards. Unless otherwise specified (see 6.21, the following specifications and standards of the-issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDLSS) specified in the solicitation, form a part of this specification to the extent specified herein. Benefi
5、cial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: USA Belvoir Research and Development Center, ATTN: STRBE-DS, Fort Belvoir, VA 22060 by using the self-addressed Standardization Document Improvement Pro
6、posal (DD ,Form 1426) appearing at the end of this document or by letter. FSC 4610 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-52333B SPECIFICATIONS FEDERAL QQ-S-781 PPP-B-601 PPP-B-6 3 6 MILITARY MIL-B-13 1 STANDARDS MILITARY - Strapping,
7、Steel, and Seals. - Boxes, Wood, Cleated-Plywood. - Box, Shipping, Fiberboard. - Barrier Material, Water Vaporproof, Flexible, Heat Sealable, MIL-STD-105 - Sampling Procedures and Tables for MIL-STD-129 MIL-STD-1188 Inspection by Attributes. - Marking for Shipment and Storage. - Commercial Packaging
8、 of Supplies and Equipment 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D412 ASTM D832 ASTM D
9、2240 - Test for Rubber Property - Durometer Hardness, - Rubber Properties in Tension. - Practice for Rubber Conditioning for Low Temperature Testing. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) UNITED STATE
10、S ENVIROWNTAL PROTECTION AGENCY (EPA) National Interim Primary Drinking Water Regulations (EPA NIPDWR). (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D.C. 20402. UNITED STATES DEPARmNT OF HEALTH AND HUMAN SERVICES (HHS) Food a
11、nd Drug Administration (FDA) Public Health Service Drinking Water Standards. (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D,C. 20402.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
12、m IHS-,-,-MIL-S-52333B 96 7777906 0237267 O m MIL-S-52333B (Copies of specifications, standards, and drawings required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications.
13、 The following document(s) form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. (Industry association specifications and standards ar
14、e generally available for reference from libraries. using Federal agencies.) They are also distributed among technical groups and 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take prec
15、edence. 3. EWQUIREMENTS 3.1 Description. The filter element sleeves shall be as shown on figure 1 and as specified herein. / 3.2 First article. The contractor shall furnish nine filter element sleeves for examination and testing within the time frame specified, to prove, prior to starting production
16、, that his production methods will produce filter element sleeves that comply with the requirements of this specification. Examination and tests shall be as specified in section 4, and shall be subject to surveillance and approval by the Government (see 6.3). 3.3 Material. Material shall be as speci
17、fied herein and shall conform to Food and Drug Administration requirements for use with food products. material shall have no adverse effect on the health of personnel when used for its intended purpose. Questions pertinent to this effect shall be referred by the procuring activity to the Food and D
18、rug Administration (FDA) or to the appropriate department medical service who will act as an advisor to the procuring agency (see 6.4). The 3.3.1 Fungus-resistance. The sleeve material shall be inherently fungus-resistant or rendered fungus-resistant to prohibit propagation of fungi. 3.3.2 Polyvinyl
19、 chloride. Polyvinyl chloride material for filter element sleeves shall conform to the following: Appearance Translucent or opaque, color optional except that white or clear is not acceptable Tensile strength, 1,250 psi, minimum Ultimate elongation, percent, 300 minimum 3 Provided by IHSNot for Resa
20、leNo reproduction or networking permitted without license from IHS-,-,-Tensile stress, psi, maximum at 100-percent elongation Resistance to low temperature Hardness, durometer: Initial (Shore A) MIL-S-52333B 600 Shall show no signs of cracking when bent back on itself at minus 20 F (minus 28.9 C). 5
21、5 to 70 3.4 Heat and water immersion stability. When subjected to the testing procedures contained herein, the filter element sleeves shall meet the following criteria : Heat stability, 1-112 hours at 212 F: Size 1: Length, inches, minimum 13-23/32 Length, inches, maximum 13-27/32 Diameter, inches,
22、minimum 3.313 Diameter, inches, maximum 3 . 344 Size 2: Length, inches, minimum 22-23 / 32 Length, inches, maximum 22-27/32 Diameter, inches, minimum 3.313 Diameter, inches, maximum 3.344 Size 3: Length, inches, minimum 12-7/16 Diameter, inches, minimum 3.313 Length, inches, maximum 12-112 Diameter,
23、 inches, maximum 3 . 344 Water-immersion stability, distilled water at 73 F: 3-day immersion in distilled water: Increase, percent maximum 1.0 Decrease, percent maximum 0.1 15-day immersion in distilled water: Increase, percent maximum 1.5 Decrease, percent maximum O. 15 30-day immersion in distille
24、d water: Increase, percent maximum Decrease, percent maximum 1.8 O. 18 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-52333B Lib 9797706 02L72b9 4 MIL-S-52333B 3.5 Performance. When subjected to the testing procedures contained herein, the f
25、ilter element sleeves shall meet the following performance criteria: a. Produce filtered water having a turbidity not exceeding 0.2 turbidity unit determined with an EPA approved nephelometric turbidimeter. b. Precoat uniformly with no evidence of thin spots, bare spots, or corrugation. c. Withstand
26、 the normal backwashing pressure of approximately 50 psi without tearing of sleeve body or splitting of seams. d. After backwashing, no filter cake shall adhere to the filter element sleeve to the extent of covering a filtering area greater than 1/16 square inch. 3.6 Government-loaned property. A fi
27、lter test assembly complete with accessories for testing all sizes of filter element sleeves will be loaned by the Government for tests specified in 4.3.2.3 (see 6.5). 3.7 Workmanship. 3.7.1 Sleeve fabrication. Perforations shall be free of all excess material. Seams shall be lap seams having a thic
28、kness not less than the thickness of the sleeve material. Lap seams shall be neatly joined, of uniform width and free of cracks, slits or extraneous material. 3.7.2 Cleaning. The filter element sleeves shall be cleaned of all dirt, grease and other contaminants. intended use of the sleeve shall also
29、 be removed. Cleaning shall be accomplished in a manner that will not leave a harmful residue. element sleeves shall be completely dried before packaging. All test residue that would adversely effect the The filter 4. QUALITY ASSURANCE PROVISIOVS 4.1 Responsibility for inspection. Unless otherwise s
30、pecified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order the contractor may use his own or any other facilities suitable for the performance of the inspecti
31、on 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. 4.1.1 Material in
32、spection. The contractor is responsible for insuring that materials used are manufactured, inspected and tested in accordance with referenced specifications and standards. 4.1.2 Inspection equipment. Special final inspection equipment shall be loaned to the contractor by the Government (see 3.6). 5
33、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-52333B 4.2 Classification of inspection. Inspection shall be classified as follows: el b. c. First article inspection (see 4.3). Quality conformance inspection (see 4.4). Inspection of packaging (
34、see 4.6). 4.3 First article inspection. 4.3.1 Examination. A filter element sleeve shall be examined as specified in 4.5.1, Presence of one or more defects shall be cause for rejection. 4.3,2 Tests. - 4.3.2.1 Material tests. Samples of unperforated polyvinyl chloride material as used in the manufact
35、ure of filter element sleeves shall be tested in accordance with 4.5.2.1 and 4.5.2.5. rejection. Failure of any test shall be cause for 4.3.2.2 Heat and water immersion stability, Two filter element sleeves shall be tested in accordance with 4.5.2.3 and 4.5.2.4 respectively. test shall be cause for
36、rejection. Failure of any 4.3.2.3 Operating tests. Six filter element sleeves shall be tested as specifjeci in 4.5.2.6 through 4.5.2.6.6. rejection. Failure of any test shall be cause for 4.4 Quality conformance inspection. 4.4 1 Sampling. 4.4.1.1 For examination. Sampling for examination shall be i
37、n accordance with MIL-STD-105. perforations shall be S-2. Inspection level for examination of dimensions of 4.4.1.2 For tests. 4.4.1.2.1 Material. A sample of unperforated polyvinyl chloride material as used in the manufacture of filter element sleeves shall be furnished for each batch or lot of pol
38、yvinyl chloride material. 4.4.1.2.2 Heat and water immersion stability. Two filter element sleeves shall be furnished for each batch or lot of polyvinyl chloride material. 4.4.1.2.3 Performance. The first 24 sleeves produced shall be tested as speciiad in 4.4.3.3. If any of the first 24 sleeves is r
39、ejected, 100 percent testing shall be continued until 24 consecutive sleeves pass all tests. After 24 consecutive sleeves have passed the test, sampling shall be in accordance with level S-4 of MIL-STD-105 except that sample size shall be to the highest multiple of 6. 6 Provided by IHSNot for Resale
40、No reproduction or networking permitted without license from IHS-,-,-MIL-S-52333B 46 W 7777906 0237273 2 W. MIL-S-52333B 4.4.2 Examination. Samples selected in accordance with 4.4.1.1 shall be AQL for the examination except dimensional examined as specified in 4.5.1. examination of perforations shal
41、l be 1.5 percent defective. sleeve fails the dimensional examination of perforations, the lot represented by the sample shall be rejected. If any sample 4.4.3 Test. - 4.4.3.1 Material. Samples selected in accordance with 4.4.1.2.1 shall be tested as specified in 4.5.2.1 and 4.5.2.5. Failure of any t
42、est shall be cause for rejection. 4.4.3.2 Heat and water immersion stability. Sample sleeves selected in accordance with 4.4.1.2.2 shall be tested as specified in 4.5.2.3 and 4.5.2.4. 4.4.3.3 Performance. Sample sleeves selected in accordance with 4.4.1.2.3 shall be tested as specified in 4.5.2.6.1
43、through 4.5.2.6.6 and as follows: a. The filter shall be started and backwashed for not less than two complete 1/2-hour starting and backwashing cycles under filtering tests (see 4.5.2.6.3). If one or more of the last four turbidity readings is greater than 0.2 turbidity unit and precoat appears uni
44、form, the filter element connections shall be examined for leaks and the filter element sleeves for proper placement on the element. The filtering test shall be repeated. If one or more of the last four turbidity readings is again greater than 0.2 turbidity unit, the lot represented by the sample sh
45、all be rejected. b. 4.5 Inspection schedule. 4.5.1 Examination. The filter element sleeves shall be examined for the defects listed below: 101. 102. 103. 104. 105. 106. 107. 108. 109. Length not as specified. Diameter not as specified. More than one seam in each direction. Width of flange not as spe
46、cified. Unperforated area at either end greater than 3/16 inch or less than 1/16 inch. Seam width not as specified. Color incorrect-or material not opaque or translucent. Angle or flange not as specified. Thickness not as specified. 4.5.1.1 Examination of perforations. The filter element sleeves sha
47、ll be examined as follows: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_I MIL-S-52333B 46 4797706 OZL9Z72 i.I W MIL-S-52333B ar Width and length of perforation. longitudinally at the seam, laid flat, and marked in three even divisions across the
48、top (circumference) and five even divisions along the length for size 1 and 3 and seven even divisions for size 2, The width and length of 30 perforations in each division shall be measured with a Bausch and Lomb measuring projector, or equal, using not less than 25X magniication. The measurements,
49、made in each division shall not be concentrated in one area. b. Distance between perforations. The distance between perforations in both the circumferential and longitudinal directions shall be measured as specified in “a“. shall be made in each division. incomplete (closed) perforations. perforations. A filter element sleeve shall be cut Not less than 15 measurements in each direction C. Incomplete perforations. Each division shall be
