1、I g-li2/-/1 MIL-F-37956 bb W 9797906 0137603 7 MIL-F-37956 (DLA-DM) 21 March 1984 MILITARY SPECIFICATION FILTER ELEMENT, AGENT SAMPLING EXTRACTOR This limited coordination military specification has been prepared by the Defense Personnel Support Center, 2500 South 20th Street, Philadelphia, PA, 1910
2、1 but it has not been approved for promul- gation as a coordinated military specification. It is subject to modification. However, pending its promulgation as a coordinated military specification, it may be used in procurement. 1. SCOPE 1.1 This specification covers a 1-7/8 inch diameter filter disk
3、 (element) for use in sampling air for the presence of radioactive particulates. 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids, form a part of this specification to the extent specified herein : SPECIFICATIONS FED E RAL
4、 PPP-B-566 - Boxes , Folding , Paperboard. PPP-8-636 - Box, Fiberboard. PPP-6-676 - Boxes, Set-up, Paperboard. STANDARDS MILITARY MIL- STD- 105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage. Attributes. (Copies of specifications , standards, drawin
5、gs and pub1 ications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving
6、this document should be addressed to : Defense Personnel Support Center, Di rectorate of Medical Materiel, DPSC-ATT, 2800 South 20th Street, Philadelphia, PA 19101, by usi ng the sel f-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this-document or by
7、letter. FSC 6640 Page 1 of 9 Licensed by Information Handling ServicesMIL-F-37756 66 9997906 0337604 7 - M1L-F -37956 (DLA-DH) 2.2 Other publications. The following document forms a part of this specification to the extent specified herein. issue in effect on date of invitation for bids or request f
8、or proposals shall apply. Unless otherwise indicated, the 136-300-1389 - Instruction Manual for the Installation, Operation and Maintenance of Penetrometer, Fil ter Testing, DOP, 9127 (Application for copies should be addressed to the Production Assurance Directorate, Edgewood Arsenal, Aberdeen Prov
9、ing Ground, MD 21010.) 3. REQUIREMENTS 3.1 Filter material. The filter material shall be made from either fiberglass strands and microglass fibers, or microglass fibers that are flexibly bound with acrylic resin. The filter material shall have physical properties conforming to table I, when tested a
10、s specified in the 4.4.1. TABLE I. Physical Properties of Filter Material Characteristic Requirement Basis weight per 3000 square feet . 37 - + 5 pounds Dry thickness .0.014 + 0.003 inches Tensile strength - Iachine direction .2,6 pounds per inch width (min.) Cross direction . 2.0 pounds per inch wi
11、dth (min.) 3.2 Fil ter material performance characteristics. , 3.2.1 Air resistance. The air resistance for a single layer of filter material shall not exceed 23.6 millimeters of mercury with an air velocity of 200 centimeters per second passing through the specimen, when tested as specified in 4.4.
12、2. 3.2.2 Dioctyl phthalate (DOP) penetration. The DOP penetration for a single layer of filter material shall be less that 10 percent using a 0.3 micron DOP aerosol in an airstream passing through the specimen a velocity of 200 centi- meters per second, when tested as specified in 4.4.2. 3.3 Constru
13、ction of filter element. The filter element shall be a single layer in the form of a 1-7/5 inch diameter disk, with +1/16 and -0 tolerances on the dimension. impression) shall have either a 5/16 to 7/16 inch diameter red dot or a 1/16 to 1/8 inch wide red line, that is applied with a water soluble d
14、ye having an affinity for the filter material. The dye mark shall not restrict the flow of air through the filter element. The downstream face of the filter disk (i.e., with wireside 3.4 Workmanship. The filter element shall be free of defects that detract from its appearance or impair its serviceab
15、ility. 2 Licensed by Information Handling ServicesMIL-F-37956 66 W 4999906 0337605 O W 4anual 136-300-138B shall apply except for the use of the fixture, a mercury manometer (or equivalent) and flow control at 200 centimeters per second. As indicated in the appendix, the orifice plate fixture shall
16、be a two-plate fixture consisting of: a. An upstream plate with a 1.5 centimeter diameter opening. b. A downstream plate with a 1.5 centimeter diameter opening. c. A stainless steel screen (40x40 mesh, 0.0085 inch wire, with 0.0165 inch opening) that is mounted in the downstream plates opening flush
17、 with the pl ate I s upstream face. 5 Licensed by Information Handling ServicesMIL-F-37956 66 99970b Oil3?bO b M MIL-F-37956 (DLA-DM) The filter material specimen shall be of sufficient size to be installed between the plates and cover the opening and pilot pins in the downstream plate. filter mater
18、ial shall be installed with its wire side against the screen. The 5. PREPARATION FOR DELIVERY 5.1 Packaging. Packaging shall be level A or C as specified (see 6.1). 5.1.1 Unit of issue. One package containing ten filter elements, as specified, constieutes a unit of issue. 5.1.2 Packaging quantities.
19、 The number of units of issue indicated in table VI shall be Dackaaed in each unit. intermediate and exterior container as applicable for the required level -of protection specified in the procurement document. TABLE VI. Packaging quantities. Unit package Intermedi ate package Exterior container - 1
20、 unit 10 units 1000 units 5.1.2.1 Packing variation permitted. If the required number of units to be shipped is less than the number of units specified to be overpacked in an exterior container, such units shall be packed in an exterior container of suit- able size and design, acceptable to a common
21、 carrier, which will insure safe delivery to destination. 5.1.3 Level A. 5.1.3.1 Unit package. Ten filter elements shall be clean, dry and packaged in a sealed peel-open type envelope of appropriate size and design. 5.1.3.2 Intermediate package. The intermediate package shall be a box conforming to
22、PPP-B-566 or PPP-B-676. 5.1.4 Level C. Units shall be packaged in standard commercial containers of the size and kind commonly used, which will afford the deqree of protection required for shipment and- use of the product for its 5.2 Packing. Packing shall be level A, B or C as 5.2.1 Level A. intend
23、ed purpose. specified (see 6.1). 5.2.1.1 Exterior container. Exterior container s,all be designed for a type 2 load and constructed in accordance with PPP-B-636, type CF, class weather- resistant. box specification. Closure, strapping, and waterproofing shall be as specified in the 5.2.2 Level B. Ex
24、terior container shall be designed for a type 2 load and constructed in accordance with PPP-B-636, type CF, cl ass domestic. C1 osure shall be as specified in the appendix of the box specification. 6 Licensed by Information Handling ServicesMIL-F-37956 66 W 7779906 0137609 ?I MIL- F-37956 ( DLA-DM)
25、5.2.3 Level C. The subject commodity shall be packed in substantial commer- cial containers of the type, size, and kind commonly used for the purpose, so constructed as to insure acceptance and safe delivery by common or other carriers, at the lowest rate, to point of delivery called for in the cont
26、ract or . purchase order. 5.3 Marking. Each unit package, intermediate package and exterior container shall be marked as specified in MIL-STD-129. 6. NOTES 6.1 Ordering data. Procurement documents should specify the fol lowing : a. Title, number, and date of this specification. b. National Stock Num
27、ber (NSN). c. Selection of applicable levels of packaging and packing (see 5.1 and 5.2). 6.2 Fil ter material. 6.2.1 Intended use. The filter element is intended for use in portable air samplers to measure airborne particulate radioactivity in radiological work areas. 6.3 Pros ecti ve material . Man
28、ufacturers usual 1 y test their fi 1 ter materi al with 0.3 -e_, micron iocnhalate (DOP) aerosol at 5.3 centimeters per second (32 liters per minute through a 100 square centimeter specimen). material that has been tested in this manner and found to have DOP penetration of 13 t 8 percent and an air
29、resistance of 8 t 2 millimeters of water, and which meets the requirements of 3.1, might meet the-requirements of 3.3.1 and 3.3.2. Filter 6.4 This Specification covers the following item listed in the Federal Supply Cata1 og : National Stock Number Item Identification 6640- O1 - 138- 57 53 FILTER EL
30、EMENT, AGENT SAMPLING EXTRACTOR Custodians : Army - EA Navy - SH Air Force - 99 Preparing Activity : DoD-DM Project No. 6640-1219 7 Licensed by Information Handling ServicesMIL-F-37756 bb m 7777706 OL37bLO 4 m Append1 x MIL-F -37956 (DLA-DW) ORIFICE PLATE FIXTURE GENERAL DESCRIPTION The orifice plat
31、e fixture herein is intended for use with the Air Techniques, Incorporated (Bal timore, MD) Model Q127 DOP Penetrometer. The purpose of the fixture is to hold a specimen of filter material while an airstream having 0.3 micron monodispersed dioctyl phthalate aerosol dispersed therein passes through t
32、he filter at a velocity of 200 centimeters per second. The fixture consists of two, 1/8 inch thick brass plates of a diameter compatible for retention in the chuck of the penetrometer (expected to be about 5 inches). The upstream plate (called “top plate“ in figure 1) has a 1.5 cm diameter center op
33、ening and two index holes to receive the index pins of the downstream plate, The pins prevent the plates from shifting. The downstream (or bottom) plate has a 1.5 cm diameter center opening that contains a stainless steel screen soldered in place so that it is on the same plane as the plates upstrea
34、m surface. to penetrate the sheet of filter specimen and mate with the index holes of the upstream plate. Two index pins protrude from this plate Each plate has a scribe mark on the outer edge so that the upstream plate can be aligned in the same position with the downstream plate each time the fixt
35、ure is used. A rubber gasket on each plate will provide a seal with the chuck of the penetrometer. :VIATERIALS 1. Plates - brass 1/8“ thick with 1.5 cm diameter center hole. 2, Index pins - brass about 3/32“ diameter by 5/32“ long. 3. Screen - stainless steel 40x40 mesh .0085“ wire with .0165“ openi
36、ng. 4. Solder - tin or equivalent, 5. Gasket - oil resistant rubber. For example: Newark Wire Cloth Company Telegraph Code Type ZXA. FINAL ASSEMBLY When plates are aligned by the index pins and scribe marks and are in contact with each other: 1. No shifting should occur. 2. 3. The center holes shoul
37、d line up. 4. No rocking of one plate on the other should occur. The solder should not reduce the 1.5 cm opening of the downstream plate. 8 Licensed by Information Handling Services- MIL-F-37956 66 m 7977906 0337633 6 m NOTE ; SCREN AND SHOULDER trr BOTTOM PLATE ONLY. I*SCM DIA* HOLE (TOP & BOTTOM PLATES) SECTION 8-6 RUBBER GASKET CHUCK SIDE FICIJRE I- I*SCM ORIFICE PLATE FIXTURE FOR DOP TEST WIT 9 tr US. GOVERNMENT PRINTING OFFICE 1984-705-040/A3421 Licensed by Information Handling Services
