1、MIL-C-24576A 3 W 7777706 0384027 4 Mn-C-24576A SH) 27 July 1987 SUPERSEDING MIL-C-24576(SH) 25 July 1978 (See 6.5 and 6.7) MILITARY SPECIFICATION CLOTH, SILICA GLASS; CLOTH, COATED, GLASS, SILICONE RUBBER COATED This specification is approved for use by the Naval Sea Systems Command, Department of t
2、he Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for two types - of woven cloth intended for use in protecting equipment and personnel from spatter from metal welding and cutting operat
3、ions. 1.2 Classification. The cloth shall be the following types, as specified (see 6.2.1): Type I - Silica glass Class 1 - Heavyweight Class 2 - Lightweight Type IIL - Fibrous glass coated with silicone rubber 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The
4、 following specifications and stan- dards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issGe of the Department of Defense Index of Specifications and Standards (DoDISS) and-supplement thereto,
5、 cited in the solicitation, Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-ad
6、dressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8305 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license
7、 from IHS-,-,-MIL-C-2457bA 83 777770b 0384028 b MIL-C-24576A(SH) SPECIFICATIONS FEDERAL PPP-P-1133 - Packaging of Synthetic Fiber Fabrics. PPP-P-1136 - Packaging of Coated (Plastic; Rubber) and Laminated Fabrics. MILITARY MIL-Y-1140 - Yarn, Cord, Sleeving, Cloth, and Tape-Glass. STANDARDS FEDERAL FE
8、D-STD-191 - Textile Test Methods. FED-STD-313 - Material Safety Data Sheet Preparation and the Submission of. MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. (Copies of specifications and standards required by contractors in connec- tion with specific acquisition
9、functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.1.2 Other Government publication. The following other Government publication forms a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be th
10、ose in effect on the date of the solicitation. U.S. COAST GUARD (USCG) USCG 164.009 - Incombustible Materials for Merchant Vessels. (Application for copies should be addressed to the Commandant (MMT), U.S. Coast Guard Headquarters, 400 Seventh Street, S.W., Washington, DC 20013.) 2.2 Other publicati
11、ons. The following documents form a part of this speci- Unless otherwise specified, the issue% fication to the extent specified herein. of the documents which aie DoD adopted shall be those listed-in the issue Of the DoDISS specified in the solicitation. Unless otherwise specified, the issues of doc
12、uments not listed in the DoDISS shall be the issue of the nongovernment doCu- ments which is current on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) C 871 - Standard Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride Sili
13、cate, and Sodium Ions. (DoD adopted ) of Textile Fabrics. D 512 - Standard Test Methods for Chloride Ion in Water. D 1682 - Standard Test Methods for Breaking Load and Elongation 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2457bA 83 77779
14、06 0384027 8 MIL-C-24576A(SH) ASTM (Continued) D 1777 - D 2000 - D 3773 - D 3774 - D 3775 - D 3776 - D 3951 - D 4029 - D 4157 - Standard Method for Measuring Thickness of Textile Standard Classification System for Rubber Products in Standard Test Methods for Length of Woven Fabric. Standard Test Met
15、hods for Width of Woven Fabric. Standard Test Method for Fabric Count of Woven Fabric. Standard Test Methods for Mass per Unit Area (Weight) of Standard Practice for Commercial Packaging. Standard Specification for Finished Woven Glass Fabrics. Standard Test Method for Abrasion Resistance of Textile
16、 Materials. Automotive Applications. (DoD adopted) Woven Fabric. (DoD adopted) Fabrics (Oscillitory Cylinder Method). (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Nongovernment standards and other publicati
17、ons are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the refere
18、nces cited herein (except for associated detail of specifications, specification sheets or MS standards), the text of this speci- fication shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained . 3
19、0 REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3 and 6.3). 3.2 Material. Asbestos and components containing asbestos are prohibited. Material shall be asbestos free. When specified in the contract or
20、purchase order, a certificate of compliance shall be prepared (see 6.2.2). 3.2.1 Cloth. Cloth shall be as specified in 3.2.1.1 and 3.2.1.2. 3.2.1.1 Type I. The warp and fill yarns of type I cloth shall be composed of amorphous silica glass. The cloth shall not contain additive amount of cristobalite
21、, quartz, and tridymite. Significant amounts of these minerals shall not be added during processing. a certificate of compliance shall be prepared (see 6.2.2). When specified in the contract or purchase order, 3.2.1.2 Type III. The warp and fill yarns used in the manufacture of type III base cloth s
22、hall be composed of 100 percent continuous filament glass yarns, and shall be in accordance with MIL-Y-1140. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2457bA 3 777970b 0384030 4 3.2.2 Recovered materials. Unless otherwise specified here
23、in, all material incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been col
24、lected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used products is allowed under this specification unless otherwise specifically specified. 3.3 Physical propert
25、ies. Physical properties shall be as specified in 3.3.1 and 3.3.2. 3.3.1 Uncoated and untreated cloth. Prior to coating or treatment, the cloth shall be as specified in table I. TABLE I. Requirements for uncoated or untreated cloth. P r ope rt y Silica content, percent Weave Style Yarns per inch War
26、p Fill Weight (oz/yd2 Color Class 1 96.0 min 8 or 12 Harness satin 42-54 32-44 31-39 Tan Class 2 96.0 min 8 Harness satin 42-54 32-44 17-21 Tan Type III - 8 Harness satin Style no. 15861 42-46 33-37 23-29 White/buf f - i/ Standard commercial style designation. 3.3.2 Coated or treated cloth. The coat
27、ed or treated cloth shall be as specified in table II. 3.3.2.1 Certificate of compliance. When specified in the contract or purchase order, a certificate of compliance shall be prepared to certify US Coast Guard approval for incombustible materials for flame resistance. 4 Provided by IHSNot for Resa
28、leNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2457bA 3 W 797790b 0384033 b m MIL-C-24576A(SH) TABLE II. Requirements for treated or coated cloth. Property Weight (oz /yd2) Thickness (inch) Color Breaking strength (lb/in) Warp (min) Fill (min) After flame (sec. max) Aft
29、er glow (sec. max) Char length (inch, rnax) Abrasion resistance (cycles) Warp (min) Fill (min) Flame resistance Blocking rating (rnax) Chloride content p/m (rnax) - l/ NR = None required. Class 1 3 1-39 O. 040-0.062 Red / b 1 a ck 200 150 (see 3.3.2.1) .loo 100 250 NRY Class 2 17-2 1 O. 023-0.032 Re
30、d / bla ck 80 55 (see 3.3,2. i) 20 20 250 NRY Type III 30-36 O. 035-0.043 Red/ black 375 225 5 4 1 800 800 No. 1 250 3.4 Width. The width of type I material, including selvage, shall be 36 (plus 2, minus 1) inches. (plus 2, minus i) inches (see table V). The width for type III cloth shall be 38 or 6
31、0 3.5 Length. Unless otherwise specified (see 6.2.1), the cloth shall be provided in rolls not less than 50 yards, nor more than 55 yards, in length. Rolls shall contain not more than two pieces, and no individual piece shall be less than 5 yards (see table V). 3.6 Noncombustibility. Type I material
32、 shall be certified as noncombus- tible (see 4.7). 3.7 Treatments and coatings. Treatments and coatings shall be as specified in 3.7.1 through 3.7.2.1. 3.7.1 Type I cloth. Type I cloth shall be impregnated from both sides with a treatment to minimize dusting and to increase the abrasion resistance o
33、f the cloth. The treatment shall contain no flurocarbons or any other halogenated hydrocarbons. When specified in the contract or order, a certificate of compli- snce shall be prepared as acceptable proof that the treatment does not contain these compounds (see 6.2.2). 3.7.1.1 Color of type I. When
34、specified (see 6.2.1), type I, class 1 and 2 cloth shall be pigmented in red or black. and zinc oxide shall be used for the black. ment shall be natural, with no added pigmentation. permanence during normal handling, and shall be non-toxic and flame resistant. Iron oxide shall be used for the red, O
35、therwise, the color of type I treat- The coloring shall retain its 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2457bA 83 777770b 0384032 8 3.7.2 Type III cloth, Type III cloth shall be impregnated on both sides with a silicone rubber comp
36、ound conforming to ASTM D 2000, M3FC 507 B37. When specified in the contract or order a certificate of compliance shall be prepared (see 6.2.2). 3.7.2.1 Color of type III. When specified (see 6.2.1), the silicone com- pound shall be pigmented with iron oxide to produce a red color, or zinc oxide to
37、produce a black color. Otherwise, the color of type III shall be white or buff. The coloring shall retain its permanence during normal handling. The coloring agent shall be non-toxic and flame resistant as specified in 3.6. 3.8 Tickets. A piece ticket shall be attached to each roll. The ticket shall
38、 be in accordance with PPP-P-1136, except that the entries may be handwritten, 3.9 Identification markings. Unless otherwise specified (see 6.2.1), each sheet shall be legibly and permanently marked with the following information: (a) Non-asbestos. (b) Specification number and class. (c) Manufacture
39、rs name. (dl Manufacturers product identity. Markings shall be not less than 3/8 inch in height. only, and on every square foot, or less, of the material. Markings shall be on one side 3.10 Material safety data sheet (type III only). The contracting activity shall be provided a material safety data
40、sheet (MSDS) at the time of contract award. The MSDS is form OSHA-20, found in and part of FED-STD-313. The MSDS shall be included with each shipment of the material covered by this specifica- tion (see 6.4). 3.11 Workmanship. The treated or coated cloth shall conform to the quality of product estab
41、lished by this specification, and the occurrence of defects shall not exceed the specified acceptable quality levels (see 4.4.2). 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract or purchase order, the contractor is responsible for the p
42、erformance of all inspection requirements as specified herein. in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the rig
43、ht 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. Except as otherwise specified 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
44、m IHS-,-,-MIL-C-2957bA 83 W 9797906 O389033 T MIL-C-2 4 5 7 6A ( SH ) 4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The
45、 absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize su
46、bmission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) First article (see 4.3). (b) Quality conformance (se
47、e 4.4). 4,3 First article inspection. First article inspection shall consist of the examinations specified in 4.4.4 and the tests specified in 4.5 and 4.6. 4.3.1 First article sample. The first article sample shall consist of a 3-yard, full-width sample of each type and class of cloth provided at an
48、y one time. 4.3.2 First article test report. When specified in the contract or pur- chase order, a first article test report shall be prepared (see 6.2.2). 4.4 Quality conformance inspect-ion. Quality conformance inspection shall consist of the examinations specified in 4.4.3 and 4.4.4, and the test
49、s specified in 4.5 and 4.6. When specified in the contract or purchase order, a quality conformance test report shall be prepared (see 6.2.2). 4.4.1 Inspection lot. An inspection lot shall consist of cloth of the same type manufactured under the same conditions and offered for delivery at one time, 4.4.2 Sampling. Unless otherwise specified herein, sampling for inspection shall be in accordance with MIL-STD-105. 4.4.3 Inspection of base material. T
