1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to commandstandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 8105 INCH-POUND MIL-DTL-32240 1 March 2007 DETAIL SPECIFICATION SUBMARINE WETBAG This specification is approved for use by all Departmen
3、ts and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for the Submarine Wetbag for use with Trash Disposal Units installed aboard U.S. Navy submarines. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this specification are specified
4、 in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that t
5、hey must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to t
6、he extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. COMMERCIAL ITEM DESCRIPTION A-A-52094 - Thread, Cotton (Copies of this document are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.d
7、la.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specifi
8、ed herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. U.S. Army Natick Soldier Center 2-3-0585 - Submarine Wetbag 2-3-0586 - Pattern, Submarine Wetbag (Copies of these documents are available from Commander, U.S. Army Soldier Systems Ce
9、nter, Kansas Street, Natick, MA 01760 or online at http:/www.natick.army.mil/.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32240 2 2.3 Non-Government publications. The following documents form a part of this document to the extent specif
10、ied herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC) AATCC 135 - Dimensional Changes of Fabrics after Home Laundering (Copies of this document are available from AATCC, PO
11、 Box 12215, Research Triangle Park, NC 27709 or online at www.aatcc.org.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (Copies of this document are available from the American National Standards Institute, 25 W. 43rd St, 4th
12、 Floor, New York, NY 10036 or online at http:/webstore.ansi.org/.) ASTM INTERNATIONAL ASTM D737 - Test Method for Air Permeability of Textile Fabrics (DoD adopted) ASTM D1424 - Standard Test Method for Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus (DoD adopted) ASTM D168
13、3 - Standard Test Method for Failure in Sewn Seams of Woven Apparel Fabrics (DoD adopted) ASTM D3775 - Standard Test Method for Fabric Count of Woven Fabric (DoD adopted) ASTM D3776 - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric (DoD adopted) ASTM D5034 - Standard Test Method for
14、Breaking Strength and Elongation of Textile Fabrics (Grab Test) (DoD adopted) ASTM D6193 - Standard Practice for Stitches and Seams (DoD adopted) (Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., PO Box C700, West Conshohocken, PA 19428-2959 or online at www.astm
15、.org.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. RE
16、QUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent
17、possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Materials and components. The bag and associated drawstring shall have no plastic or metal materials in its construction. The bags shall be
18、 made of biodegradable cotton woven cloth, and biodegradable cotton thread and cord. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32240 3 3.3.1 Fabric. The cloth shall be made from 100 percent cotton that is natural, unbleached, uniform na
19、tural color, and woven using single yarn for both the warp (see 6.4.5) and filling. The cloth shall conform to the physical requirements listed in Table I. TABLE I. Physical requirements. Physical Requirements Limits Fabric Count, yards per inch (YPI) Warp 70 (min) Filling 42 (min) Weight, oz./sq. y
20、d. 8.5 9.0 Breaking Strength, lbs. Warp 120 (min) Filling 130 (min) Tearing Strength, lbs. Warp 6.5 (min) Filling 8.0 (min) Air Permeability, CFM 50 (max) 3.3.2 Dimensional stability. The fabric shall not stretch excessively when wet, so that the finished bag shall be capable of passing through the
21、TDU when the bag is filled with trash. The fabric shall have an average dimensional change in the warp of no more than 15.0 percent, and not more than 5.0 percent in the fill (see 6.4.1) direction. 3.3.3 Thread. The thread shall be cotton conforming to A-A-52094, Type I, machine thread, soft finish,
22、 size ticket no. 30 (60 tex) / 3-ply with a minimum breaking strength of 3.0 pounds. 3.3.4 Cotton drawstring cord. The drawstring cord shall be cotton braid, 3/16-inch diameter, 8 carriers with 3 double, 2-ply yarns/carrier (6 2-ply yarns/carrier), and shall have a minimum breaking strength of 105.0
23、 pounds. 3.4 Physical properties of bag. The bag shall be constructed of one piece of cloth. The dimensions of the cut pieces and finished bag shall be as specified on Drawing 2-3-0586. The bag opening shall form a cuff over the open end of the pre-pack can and the bottom of the bag shall extend and
24、 fully contact the bottom of the pre-pack can simultaneously. 3.5 Opening of bag. The opening of the bag shall have a tunnel with a cotton, closed loop drawstring to close the bag. The drawstring shall be as specified in 3.3.4 and shall be attached to the bag so it may be used to close and lift the
25、bag without tearing. 3.6 Bag density. The filled bags shall be designed to be denser than seawater when filled to their maximum volume and weighted to no more than 40.0 pounds. 3.7 Workmanship. The bags shall be uniformly made; neatly trimmed; and free from holes, stains, tears, or other defects whi
26、ch may impair their serviceability or appearance. Bags shall be free from excessive lint. 3.8 Seams. The bag shall be inverted so that the seams are located on the inside of the bag. All stitch lines shall be backstitched as specified on Drawing 2-3-0585. Seams shall be straight and even, and shall
27、be secured at the ends to prevent unraveling. 3.8.1 Side seam. The single seam of the bag shall conform to ASTM D6193, seam type SSa-2 with 301 or 401 stitch type at 7-9 stitches per inch (SPI). 3.8.2 Seam strength. The seams strength shall be 70.0 pounds or greater when tested in accordance with AS
28、TM D1683 and ASTM D5034. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32240 4 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2).
29、 b. Conformance inspection (see 4.3). 4.2 First article inspection. First article inspection shall be performed on 12 submarine cloth wetbags when a first article sample is required (see 3.1). This inspection shall include the tests and examinations of Table II. 4.3 Conformance inspection. Conforman
30、ce inspection shall include the tests and examinations of Table II. Unless otherwise specified (see 6.2), sampling for inspection of each lot (see 6.4.2, 6.4.3, and 6.4.4) shall be performed in accordance with ANSI/ASQ Z1.4. TABLE II. First article and conformance inspections. Inspection Requirement
31、 Paragraph Test Paragraph First Article Inspection Conformance Inspection Fabric 3.3.1 4.4 X X Dimensional Stability 3.3.2 4.5 X X Drawstring Tensile Strength 3.3.4 4.6 X X Finished Bag Pre-Pack Can Fit 3.4 4.7.1 X Finished Bag Pipe Slide 3.4 4.7.2 X Bag Density 3.6 4.8 X End Item Visual Examination
32、 3.3.1, 3.3.3, 3.4, 3.5, 3.7, 3.8, and 3.8.1 4.9 X X Seam Strength 3.8.2 4.10 X Packaging 5.1 4.11, 4.11.1, and 4.11.2 X X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32240 5 4.4 Fabric tests. The tests of Table III shall be conducted for
33、 the cloth fabric prior to the use of a new lot of cloth (see 6.4.3) to ensure compliance with the requirements of 3.3.1. TABLE III. Fabric tests. Physical Requirements Limits Test Method Fabric Count, yards per inch (YPI) Warp 70 (min) Filling 42 (min) ASTM D3775 Weight, oz./sq. yd. 8.5 9.0 ASTM D3
34、776 Option C Breaking Strength, lbs. Warp 120 (min) Filling 130 (min) ASTM D5034 Tearing Strength, lbs. Warp 6.5 (min) Filling 8.0 (min) ASTM D1424 Air Permeability, CFM 50 (max) ASTM D737 4.5 Dimensional stability test. The dimensional stability of the fabric shall be tested in accordance with AATC
35、C 135 with the washing machine set at permanent press and a wash and rinse cycle of 80 F, with no detergent or ballast. Measurements shall be taken after one laundering while wet. Failure of the fabric to meet the requirements of 3.3.2 shall constitute failure of the test. 4.6 Drawstring tensile tes
36、t. Five specimens of a lot of drawstrings, or lot of drawstring (see 6.4.4) material, prior to cutting, shall be subjected to tensile testing. Tensile testing shall be conducted with an Instron Machine crosshead speed of 20 inches per minute with a starting jaw separation of 4 inches. Specimens shal
37、l be cut 12 inches long. The cut length of the drawstring, specified on Drawing 2-3-0585, shall be measured when laid straight and flat in a relaxed state. 4.7 Bag tests. The tests of 4.7.1 and 4.7.2 shall be conducted for each new lot of cloth fabric. Corrective measures shall be instituted to prev
38、ent the failure(s) in subsequent tests. 4.7.1 Finished bag pre-pack can fit test. Five finished sample bags shall be tested. A pre-pack can, NSN 5342-00-371-8594 or equivalent, without strainer in the bottom of the can, shall be used (some cans are provided with removable strainer which will need to
39、 be removed). The bag shall be placed in the pre-pack can such that the bag opening forms a cuff over the open end of the pre-pack can and the bottom of the bag extends and fully contacts the bottom of the pre-pack can. Inability of any of the five bags to form a cuff over the can and simultaneously
40、 the bottom of the bag to extend and fully contact the bottom of the can shall constitute failure of the test. Different cloth fabric and/or upper limit on bag width shall be used. 4.7.2 Finished bag pipe slide test. Five finished sample bags shall be tested. A vertically oriented pipe, at least 3 f
41、eet long, with the bottom opening at least 22 inches off of the floor shall be used. The pipe shall be smooth on the inside with a 9- to 9-inch inside diameter circular cross-section. Each bag shall be filled with at least 29.0 pounds of damp or wet shredded paper and immersed in water for full satu
42、ration. Each bag shall be removed from the water and allowed to sit on a hard level surface for 2 to 4 hours. Each bag, with the drawstring on top, shall be placed with the bottom no lower than 6 inches below the top of the pipe opening, and allowed to fall through from its own weight. If any of the
43、 5 bags cannot fall through the pipe because the filled bag has an excessively large cross-sectional diameter, the bags have failed this test. A different cloth fabric and/or upper limit on bag width shall be used. Provided by IHSNot for ResaleNo reproduction or networking permitted without license
44、from IHS-,-,-MIL-DTL-32240 6 4.8 Bag density. Five finished sample bags shall be tested. Each bag shall be filled to the maximum volume of the bag with damp or wet shredded paper and weighted to make the bag weigh no more than 38.9 pounds (38.9 pounds is the equivalent weight of freshwater for the v
45、olume of 40.0 pounds of saltwater). The filled bags must be fully closed using the drawstring. Each bag shall be placed in fresh water at room temperature, deeper than 27 inches and released. If any one of the five bags does not immediately sink to the bottom and/or floats on the surface, the bags h
46、ave failed the test. 4.9 End item visual examination. The end items shall be examined for defects (i.e., nonconformities) listed in Table IV as specified (see 6.2). The lot size shall be expressed in number of bags. The sample unit shall be one finished bag with one drawstring attached. TABLE IV. En
47、d item visual defects. Classification Examination Defect Major Minor Wrong material, hole, cut , tear, smash, broken or missing yarn 101 Fabric More than one piece of fabric used. 102 Wrong material, hole, cut, tear, smash, broken or missing yarn 103 Defects which may cause breakage in use 104 Draws
48、tring Not closed loop 201 Wrong thread, thread breaks, skipped stitches, or run-offs. Thread breaks shall be overstitched. 105 Wrong seams or stitch type 106 Not uniform and complete over entire area of seams 202 Not within edge tolerances 203 Stitching, seam, and stitch type Open seams 107 Hole, cu
49、t, or tear in bag 108 Bag improperly trimmed 204 Excessive lint 205 Construction and workmanship Stain on bag 206 Dimensions Bag dimensions not within tolerances of drawings and/or determined from pipe slide tests 109 4.10 Seam strength. The seams shall be tested in accordance to ASTM D1683 and ASTM D5034. Seven specimens shall be tested. The mean of the 7 tests shall be 70.0 pounds or greater. 4.11 Packaging examination. The fully pack
