1、I MIL-T-7247B 83 7779706 0436437 T W MIL-T-72 49B 30 December 1969 SUPERSEDING MIL-P-7249A(USAF) 28 June i963 MILITARY SPECIFICATION TARPAULIN, LIGHT WIGHT This specification is mandatory for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE * 1.1 This specification covers
2、 tarpaulins for use with liferafts. * 1.2 Classification. The tarpaulin shall be of the following sizes as specified (see 6.2 ) . Dimensions 67 1/2 X 84 inches _I Size 1 2 84 X 132 inches _I 2. APPLICABLE DOCLJIrnNTS * 2.1 The following documents of the issue in effect on date of invitation for bids
3、 or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS Federal V-“-295 DDD- L- 2 O pP-13-6 36 Military MIL-C-577 MI L-D-47 36 MIL-G-16491 STANDARDS Federal FED-STD- FED-STD-595 FED-STD-751 Thread, Nylon Label; For Clothing, Equipage, And Tentage, (G
4、eneral Use) Box, Fiberboard Cloth, Twill, Gylon, 1.6 And 3.0 Ounce Decal, Light Weight Paulin Gromnet , Metallic Textile Test Nethod Colors Stitches, Seams, And Stitchings Obtained From 2625 %.Hickory St. Santa An.a. CA 92707 GLOBAL ENGINEERING DOCUMENTS . (71 4)540-9870: (800)854-7179 FSC 8340 Prov
5、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-72Ll7B 83 m 7777906 09361138 1 m MIL-T-7249B Mil it ary MIL-STD-105 MIL-STD-129 MIL-STD-143 Sampling Procedures And Tables For Inspection By Attributes Marking For Shipment And Storage Specifications
6、And Standards Order Of Precedence For The Selection Of (Copies of specifications, standards, drawings,and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) * 2.2 Other public
7、ations. The following documents form a part of this specification to the extent specified herein. issue in effect on date of invitation for bids or request for proposal shall Unless otherwise indicated, the apply Federal Food, Drug and Cosmetic Act and General Regulations for Its Enforcemen t. (Appl
8、ication for copies should be addressed to the Superintendent of Documents, US Government Printing Office, Washington DC 20402.) Nat ional Clas si fi cat ion Board National Motor Freight Classification (Application for copies shall be addressed to the National Classification Board, 1616 P Street, N.W
9、. Washington DC 20036.) Uniform Classification Committee Uniform Freight Classification (Application for copies shall be addressed to the Uniform Classification Committee, 202 Union Station, Chicago IL 60606.) 3. mQUIRE14ENTS * 3.1 First article approval. Unless otherwise specified (see 6.2) before
10、pro- duction is commenced, a sample of each type of tarpaulin being furnished shall be submitted to Contracting Officer or his authorized representative for inspection as specified in 4.2. authorizes the commencement of production, but does not relieve the supplier of responsibility for compliance w
11、ith all the provisions of this specification. First axticle shall be manufactured in the same facilities to be used in the manufacture of production items. The approval of the first article * 3.2 Selection of specifications and standards. Specifications and standards for necessary commodities and se
12、rvices not specified herein shall be selected in accordance with MIL-STD-143 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-7249B * 3.3 Materials. a * 3.3.1 Basic fabric. The basic fabric for the tarpaulin shall conform to Type I of MIL-C-577.
13、 * 3.3.1.1 Coating compound. The coating compound for the basic fabric shall be suitably compounded polymer or copolymer vinyl resin pigmented to meet the requirements of this specification. The coating compound shall not have a detrimental affect on the fabric gor on the skin of personnel coming in
14、 contact with the coated fabric, and shall not render rain water caught on the finished tarpaulin unsuitable for use as drinking water. The coating compound shall conform to the standards set forth in the Federal Food, Drug, and Cosmetic Act as amended and regulations promulgated thereunder. * 3.3.1
15、.2 Coated fabric. The coating compound specified in 3.3.1.1 shall thoroughly impregnate the base fabric and shall be applied equally to both sides to form a balanced coating. Coated fabric shall weigh not more than 5.5 ounces per square yard. * 3.3.2 Thread. The thread shall conform to type I, class
16、 1, size E of V-T-295. color of the fabric and shall show good colorfastness to weathering. * 3.3.3 Grommets. The grommets shall be black, oxidized, brass grommets con- forming to type I, class 3 of MIL-Gl6491 and shall be located as shown on Figures 1 and 2. Reinforcement patches of the coated fabr
17、ic shall be placed under each grommet on the yellow side and shall be secured either by heat sealing or with an adhesive compatible with the coating compound used with the basic fabric. The color of the thread shall be an approximation of the blue The yellow side of the patch shall be up. * 3.3.3.1
18、Setting of grommets. Holes punched to receive the grommets shall be smaller than the outside diameter of the grommet barrel so that the barrel must be forced through the hole. without cutting the materials. The grommets shall be tightly clinched * 3.4 Construction. The tarpaulin shall be constructed
19、 in accordance with * 3.4.1 Seam construction. Seam construction may be either stitched and Figures 1 and 2, and as specified herein. sealed, cemented or heat sealed. The outside edge of the tarpaulin shall be folded back 1/4 inch plus or minus 1/16 inch on the yellow side and shall be securely sewn
20、, cemented or heat sealed to the fabric. The yellow side shall not show on the blue side of the tarpaulin. in accordance with FED-STD-751, type LSA-2 and shall be single lapped a minimum of one inch in width. The panel joining seams shall be * 3.4.1.1 Stitched and sealed seams. Stitches, stitching,
21、and formation of stitched seams shall conform to FED-STD-751 and shall be made using stitch type 301.with 5 to 7 sti%ches per inch. type 301 or 401, with to 7 stitches per inch and with the seam construction and stitching gage in accordance with the applicable figure. Whenever stitch 401 is used, th
22、e looper (under thread) shall be on the yellow side of the Panel joining seams shall be either stitch 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-7249B 83 9999906 043b440 T 84 fi 71 67hfl I 1; MIL-G-16491., TYPE I,. CLASS 3, GROMMET, 14 R
23、EQD il I GROMMETS ALONG EACH SIDE SHALL BE EQUALLY SPACED ID r“ I I $3 LA I I I REINFORCING PATCHES HEATSEAL IN PLACE GROMMET- WASHER ON THIS SIDE OR HEATSEAL IN PLACE I 1 4 1 9 4 ! -4 - I * L+ I DETAIL VIEW AT Y DIMENSIONS IN NCHES UNLESS OTHERWISE SPECIFIEO, TOLERANCES: FRACTION k & 3J LI B 4 DETA
24、IL VIEW AT 2 - SECTION A-A FIGURE I TARPAULIN SIZE 1 4 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-7247B 3 W 7777706 0436443 3 W 8 E I I dl r-r- * - 757 “I I I I 11 lei .JI I I I MILG16491, TYPE I, CLASS 3, GROMMET, 20 REQD GROMMETS ALONG
25、 EACH SIDE SHALL BE EQUALLY SPACED I I REINFORCING PATCHES HEATSEAL IN PLACE GROMMET -WASHER ON THIS SIDE 8 4. BOTTOM VIEW AT Y DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED, TOLERANCES: FRACTION 2 BOTTOM VIEW AT Z - ITCH SECTION A-A FIGURE 2 TARPAULIN SIZE 2 5 - Provided by IHSNot for ResaleNo re
26、production or networking permitted without license from IHS-,-,-flIL-T-7247B 83 W 777770b 0113611112 3 MIL-T- 72 4 9B tarpaulin. the specified thread so that the hole made in the fabric by the needle is of the minimum size. not less than 1 inch at each break. be overstitched not less than 1-1/2 inch
27、es. under in a hem or held down by other stitching, stitching shall be back- stitched at the ends not less than 1 inch. Thread tension shall be maintained so that there will be no loose stitching. All ends of thread shall be trimmed to a length of 1/2 inch or less. The needle used shall be the small
28、est size that can be used with Thread breaks ia stitch type 301 shall be backstitched Thread breaks in stitch type 401 shall Except where ends are turned 3.4.1.1.1 Sealing of stitched seams. sealing compound compatiblewith the coating compound used for the basic fabric. needle holes, and shall appro
29、ximate the yellow shade of the tarpaulin. Application of sealant to the hem is not required. 3.4.1.2 Cemented seams. a minimum of one inch in width, cemented and rolled to secure adhesion of the cemented parts. All sewed seams shall be sealed with a The sealing compound shall be applied so as to eff
30、ectively seal all The panel joining seams shall be single lapped 3,4.1.3 Heat sealed seams. a minimum of one inch in width and heat sealed so as to form a secure bond between the sealed parts. The panel joining seams shall be single lapped 3.4.1.4 Dusting powder. The coated fabric and all sealed sea
31、ms shall be dusted with whiting, talc or any finely divided mineral material that will not support mildew growth or affect potability of rain water which is trapped by the tarpaulin. c 3.5 Performance. 3.5.1 Flexibility. 3.5.1.1 Room temperature. The coated fabric shall be flexible and shall bend sh
32、arply when tested as specified in 4.5.2.1. 3.5.1.2 Low temperature. The coated fabric shall not crack when tested as specified in 4.5.2.2 * 3.5.2 Heat resistance. The coated fabric shall show no evidence of tackiness, blistering, or softening when tested as specified in 4.5.3. * 3.5.3 Water resistan
33、ce, The coated fabric shall remain impervious to water when tested as specified in 4.5.4. * 3.5.4 Seam hydrostatic. The sealed seams and the immediate adjacent area shall be subjected to hydrostatic test specified in 4.5.5. * 3.5.5 Seam blocking. There shall be no tackiness, blistering, or softening
34、 of the fabric when tested for seam blocking as specified in 4.5.6. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-7247B 83 = 7779706 0436443 5 I 3.5.6 Seam adhesion. Cemented or heat-sealed panel joining seams shall have an initial seam adh
35、esion of not less than four pounds per inch when tested as specified in 4.5.7. * 3.6 Dimensions. The dimensions of the size 1 and size 2 tarpaulins are as specified in Figures 1 and 2. * 3.7 Color. One side of the tarpaulin shall be yellow in accordance with color No. 33538 of FED-STD-595, and the o
36、ther side shall be blue in accordance with color No. 34158 of FED-STD-595. * 3.8 Signai panels for signaling. An instruction decal conforming to MIL-54736 shall be attached to the lower left corner of the blie side of the tarpaulin. * 3.9 Identification of product. Each tarpaulin shall have an ident
37、ification label conforming to type IV, class 8 of DDD-L-20 except that the content of the label shall be as shown in 3.9.1. left corner not more than two inches from the hem of the yellow side of the tarpaulin. The label shall be located on the lower * 3.9.1 Label contents: Tarpaulin Light Weight Sp
38、ed f i cat ion MIL-P-7249B Order No. * Stock No. * Manufacturers Name or T.rademark * Contractors Name I Size * For use with survival kits. May be used as a signal, a camouflage cloth, a sunshade or tent, or for catching drinking water. The manufacturer shall include the applicable data. * 3.10 Work
39、manship. The tarpaulin shall be constructed in a thoroughly workman- like manner. that might affect appearance or functionability. The finished tarpaulin shall be clean and free from any defects 4. QUALITY ASSURANCE PROVISIONS * !l. 1 Responsibility for inspection. Unless otherwise specified in the
40、contract or purchase order, the supplier is responsible for the performance of ail inspection requirements as specified herein. Except as otherwise specified in the contract or ordar,the supplier may use his own or any other facilities suitable for the performance of the inspection requirements spec
41、ified 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. Provided by IHSNot for ResaleNo repro
42、duction or networking permitted without license from IHS-,-,-MIL-T-7247B 83 777770b 0436444 7 * 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. b. First article sample inspection (see 4.3). Quality conformance inspection (see 4.4). * 4.3
43、First article inspection. When a first article sample is required, it shall be examined for defects listed in Table III and 4.4.2, and tested for characteristics listed in Table II. * 4.14 Quality conformance inspection. The tests and examinations comprising quality conformance inspection are to be
44、classified as specified in 4.4.1 and 4.4.2. * 4.4.1 Tests. * 4.4.1.1 Coated nylon cloth. The sample unit for testing shall be 1-1/2 yards full width. The lot shall be expressed in terms of linear yards of coated nylon cloth. The inspection level shall be S-1 of MIL-STD-105. The acceptable quality le
45、vel shall be 6.5 defects per 100 units. Tests shall be made for characterisitcs listed in Table I. TABLE I Characteristic Requirement Test Method Weight Flexibility Room Temperature Low Temperature Heat Re si st ance Water Resistance 3.3.1.2 3.5.1.1 3.5.1.2 3.5.2 3.5.3 4.5.1 4.5.2.1 4.5.2.2 4.5.3 4.
46、5.4 * 4.4.1.2 End item. The sample unit shall be one completely fabricated tarpaulin. The inspection level shall be S-3 of MIL-STD-105 and the acceptable quality level shall be 1.5 defects per 100 units. are applicable to the sanple unit. listed in Table II. All requirements Tests shall be made for
47、characteristics TABLE II Characteristic Requireme- Seam Hydrostatic Seam Blocking Seam Adhesion 3.5.4 3.595 3.5.6 8 Test Method 4.5.5 4.5.6 4*5.7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-72Y7B ti3 m 7777906 OL(3bYL15 7 MIL-T-7249B TABU I
48、II - CLASSIFICATION OF DEFECTS FOR VISUAL CHARACTERISTICS Examine Defect Major Minor A Minor B Fabric Coating Grommets Holes, cuts, or tears X Pinholes when light is clearly visible through coated fabric X Fabric or coating defects affect- ing serviceability or appearance seriously X Fabric or coati
49、ng defects affect- ing serviceability or appearance but not seriously Datuaged, cracked, or punctured X Any area of coating omitted or coating tacky or flaking X Size or type not as specified -affecting serviceability -affecting serviceability but -not affecting serviceability seriously X not seriously improperly set or loosely clinched, allowing grommet to rotate around hole Clinched excessi
