1、18 Hoven5el- 1379 SUPERSEDING MIL-T-1956C 9 May 1967 MLITARY SPECIFICATION TARPAULINS, WATERPROOF, SPECIAL PURPOSE, 10 FEET LONG BY 8 FEET WIDE 1. SCOPE 1.1 Scope.- This specification covers the requirements for special 1.2 Classification.- The tarpaulins covered by this specification purpose, water
2、proof tarpaulins (see 6.1). shall be of one type and three classes (see 6.2). Class 1 - Stitched and sealed seams. Class 2 Class 3 - Cemented seams. - Single stitched, laid in cement and strapped seams. 2. APPLICABLE DOCUMENTS * 2.1 The following documents of the issue in effect on date of invitatio
3、n for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL V-T-285 - Thread , Polyes ter. -P-268 - Paper, Kraft, Untreated, Wrapping. CCC-C-432 - Cloth, Sheeting, Cotton (Unbleached, Bleached DDD-L- 20 - Label; For Clothing, Equipage
4、and Tentage (General PPP-T-45 - Tape; Gummed Paper, Reinforced and Plain, for and Dyed). use). Sealing and Securing. FSC 8340 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* NIL-T-395bD 83 997390b 0372638 O MILITARY MIL-R-1670 - Rope, Tent-Lay. MIL
5、-L-1709 - Lines, Tent. MZL-0.16491 - Grommet, Metallic. ML-B-17757 - Boxes, Fiberboard, Corrugated (Modular Sizes). STANDARDS FEDERAL FED-STD-191 - Textile Test Methods. FED-STD-406 - Plastics: Methods of Testing. FED-STD-601 - Rubber: Sampling and Testing. FED-STD-751 - Stitches, Seams, and Stitchi
6、ng. MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD.129 - Marking for Shipment and Storage. MIL-STD.147 - Palletized and Containerized Unit Loads 40“ x 48“ Pallets, Skids, Runners or Pallet-Type Base. DRAWINGS ARMY NATICK LABORAMRIES 8-2-69 - Tarpaulins, W
7、aterproof, Special Purpose. (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 publications.- The following doc
8、uments form a part of this specification to the extent specified herein. the issues in effect on date of invitation for bids or request for proposal shall apply: Unless otherwise indicated, NATIONAL MTOR FREIGHT TRAFFIC ASSOCIATION, INC., National Motor Freight Classification (Application for copies
9、 should be addressed to American Trucking Associations, Attn: Tariff Order Section, 1616 P Street, N.W., Washington, D.C. 20036,) UNIFORM CLASSIFICATION COMMITTEE Uniform Freight Classification 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-P- MIL
10、-T-375bD 3 777770b 0372639 2 m. (Application for copies should be addressed to Uniform Classification Comnittee, Room 202 Union Station, 516 W. Jackson Blvd., Chicago, Illinois 60606.) 3. REQUIREMENTS * 3.1 First article.- This specification contains provisions for first article test and approval (s
11、ee 4.2, 6.2, and 6.4). 3.2 Material.- 3.2.1 Base fabric.- The base fabric shall be cotton sheeting cloth, coating quality, type VIII, class 1, conforming to CCC-C-432. 3.2.2 CoatinR compound.- The compound used for coating the fabric and strapping material shall be synthetic rubber (except that the
12、use of natural rubber is permissible in the anchor coat) suitably plasticized and pigmented to produce shade 06-207. No reclaimed rubber shall be used. * 3.2.3 Cement or sealinn compound.- The cement or sealing compound used in strapping or sealing of seams shall be of synthetic rubber base. reclaim
13、ed rubber shall be used. Heat curing type cement or sealing compound shall be used for tarpaulins made from uncured coated fabric; self curing type shall be used for tarpaulins made from cured coated fabric. compound and their suitability in producing acceptable tarpaulins shall be based upon confor
14、mance with performance requirements of tarpaulins as specified in 3.5. compound specified in 3.2.2. No Compatibility of the cement or sealing compound with the coating The color shall be comparable to the shade of coating 3.2.4 Coated fabric.- The base fabric shall be coated on both sides with 8 oun
15、ces f.1 ounce per square yard of the specified coating compound. The face side of the fabric shall be coated with 6 ounces +1/2 ounce of coating compound per square yard; the reverse side shall contain the balance of the coating. After vulcanization, the coated fabric shall be free from pinholes. Th
16、e coated fabric shall conform to the physical requirements specified in table I when tested as specified in 4.3.1. The color of the -cated fabric shall be OG-207 and shall match the standard sample for shade when such a standard is available, (see 6.3). 3 Provided by IHSNot for ResaleNo reproduction
17、 or networking permitted without license from IHS-,-,-MIL-T-It95bD 83 I 999990b 0372620 9 I MIL-T-l956D( GLJ TABLE I.- Physical requtrements of coated fabric Requirement Characteris tic Minimum Maximum Overall weight, ounces/sq. yd Breaking strength - pounds Warp Filling 12.5 16.0 65 55 Tearing stre
18、ngth - graus Warp 800 Filling .640 Hydrostatic resistance - pounds/sq. inch Ini tial After resistance to low temperature After weatherometer After strength of coating Adhesion of coating - pounds/2 inch width Initial After water spray I;/ Abrasion resistance 30 30 30 30 6.0 5.0 Pass L/ Blocking - sc
19、ale rating No. 3 Stiffness - centimeters - warp only Ini tia1 After heat treatment After water leaching 11.0 11.0 11.0 i/ Coating shall not soften. - 2/ No visual loose fibers of the base fabric shall be exposed in the center - one inch of the abraded portion. 3.2.5 Thread.- The thread for stitching
20、 shall be thread, polyester conforming to type I or II, class 1, sub-class B of V-T-285. shall be size FF or needle and bobbin for stitch type 301 and size FF for needle and size F for looper for stitch type 401. The thread 3.2.5.1 Color.- The thread shall match shade S-1, cable No. 66022. 4 Provide
21、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-T-195hD 83 9999906 0372621 0 MIL-T-l956D(GL) 3.2.5.2 Colorfastness.- The thread shall show fastness to weathering equal to or better than the standard sample, or if no standard sample is available, itgood
22、 fastness to weathering, (see 6.3). 3.2.6 Rope.- The rope shall conform to type I, class 2, size 3/4 inch circumference of MIL-R-1670. 3.2.7 Grornets.- The grommets shall conform to type II, class 3, size 25 of MIL-G-16491. 3.2.8 DustinP powder.- To prevent blocking, the coated fabric and all sealed
23、 seams shall be dusted with whiting, talc or other finely divlded mineral material which does not: support mildew growth. 3.2.9 Suppliers identification marking.- Each tarpaulin shall have a suppliers identification marking conforming to type IV, class 8 of DDD-L-20 located as specified in Drawing 8
24、-2-69. 3.3 Design.- The design of the tarpaulins shall be in accordance with Drawing 8-2-69. Except as otherwise specified, tolerances for all dimensions shall be shown in Drawing 8-2-69. shall be the inside of the tarpaulin. The lightly coated side 3 B4 Construction.- * 3.41 Overall construction.-
25、The tarpaulin shall be made of not more than three panels. shall be full length and shall be parallel to the lengthwise direction of the tarpaulin. Einished hems to measure 3/4 inch wide. each of the four comers of the tarpaulin, centered at the apex two inches from the long and short hem. along eac
26、h of the two hems. apart and placed so that each gromet is centered 1-1/2 inches from the crosswise center line of the tarpaulin. The other two gromets shall be inserted midway between the corner and center line gromnets. shall be double reinforced with self material i-1/4 inches k1/8 inch in diamet
27、er. inside of the tarpaulin (see 3.3). The barrel of the grommet shall be on the inside of the tarpaulin. six inches conforming to the requirements specified in 3.2.6 shall be supplied with each tarpaulin. The ends of the rope shall be securely served or whipped to prevent unlaying or fraying in acc
28、ordance with the material and construction requirements of MIL-L-1709. Splicing of panels shall not be permitted. The seam All edges shall be hemmed as specified in 3.41.2; the One gromet shall be inserted in Four additional gromnets shall be inserted Two of the gromets shall be inserted 3 inches Al
29、l gromets The grommet reinforcement pieces shall be cemented to the A rope twenty-feet in length plus or minus Machine serving of 5 o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ _- NIL-T-195bD 83 9999906 0372622 2 ends shall be accomplished inc
30、h. The stitching shall of the rope. using stitch type 304 and 12 to 16 stitches per extend at least 1-1/2 inches from the free end 3.4.1.1 Stitches, seams and Stitching (general).- Stitches, seams and stitching shall conform to FED-STD-751. is used, the looper, that is the underthread, shall be on t
31、he inside (see 3.3) of the tarpaulin. which can be used with the specified thread in order to minimize the size of the hole made in the fabric by the needle, Thread breaks in type 301 stitching shall be backstitched not less than one inch, and stitchings shall be backstitched not less than one inch
32、except where the ends are caught in other seams or stitchings. shall be chained off 1/2 to 1 inch, folded back and tacked with a 301 stitch, less than 1-1/2 inches. Whenever stitch type 401 The needle shall be the smallest size possible Ends of seams Ends of 401 stitchings Thread breaks in type 401
33、stitching shall be overstitched not 3.4.1.2 Hemming.- The hem shall be formed using either stitching type EFt-2 or seam type LSk-2 with a strip of self material, 1/4 inch turnunder, 1/8 inch stitching margin, stitch type 301 or 401, 5 to 7 stitches per inch; or the hem may be firmly cemented to the
34、body fabric without turning the raw edge. Application of sealant to the hem is not required. The hem shall be on the inside (see 3.3) of the tarpaulin. 3.4.2 Seam construction.- At the option of the supplier, the seams for joining the panels of the tarpaulins shall conform to any of the construction
35、s specified in 3.4.2.1, 3.4.2.2 and 3.4.2.3. 3.4,2.1 Class 1 seam construction.- When class 1 seam construction is used, the tarpaulins shall be constructed from cured, coated fabric. All joining seams shall be seam type LSc-2, 3/4 inch gage 1/8 inch stitching margin, stitch types 301 or 401, 5 to 7
36、 stitches per inch. The seams shal be sealed with a minimum of three coats on the inside (see 3.3) of the tarpaulin with the cement or sealing compound specified in 3.2.3 by brushing, spraying or squeegeeing the compound onto the seam. compound shall be applied so as to effectively seal and junction
37、 of the body fabric and the seamoverlap and to effectively seal all needle holes. 3.4.2.2 Class 2 seam construction.- When class 2 seam construction is The used, the tarpaulins shall be constructed from cured coated fabric. Ail joining seams shall be formed by superimposing the two plies of fabric w
38、ith their edges 1/8 to 3/16 inch apart and seaming 1/2 inch from the edge 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-1456D 83 999990b 0372623 LI 9 MIL-T-1956D (GL) of the bottom ply in accordance with figure (a) of seam type LSr-2, stit
39、ch type 301 with 5 to 7 stitches per inch. cement, turned to one side and cemented down forming a 112 inch seam on the inside (see 3.3) of the tarpaulin, then strapped on the inside with a 1-1/4-inch wide strip of coated fabric centered on the seam. strapping may be either bias or straight cut. The
40、seam shall be laid in The * 3.4.2.3 Class 3 construction.- When class 3 construction is used, the - tarpaulins must be fabricated from coated fabrics in the uncured state and thoroughly cured after fabrication. (seam type LSa-1, except that no stitching is required) a minimum of one inch in width, c
41、emented and rolled so as to secure adhesion of the cemented parts Ail seams shall be single lapped 3.5 Physical requirements.- All tarpaulins shall conform to the applicable end item requirements in table II when tested as specified in 4.3.2.2. TABLE II.- End item physical requirements Characteristi
42、cs Requ i remen t Adhesion of strapping - pounds minimum (applicable for class 2 only) Initial After water inmersion Adhesion of cemented seams - pounds minimum (applicable for class 3 only) Initiai After water inmersion 3.0 2.4 3.0 2.4 Seam hydrostatic - (all classes) Seau blocking (all classes) ma
43、ximum No. 3 No leakage * 3.6 Workmanship.- The finished tarpaulins shall be clean, and free from my cut, slit, tear, hole, abraded area, blister, lump, peeling, cracking, or flaking. shall not exceed the applicable acceptable quality levels. The coating shall be evenly applied. The occurrence of def
44、ects 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 -. _. . . .I . MIL-T-175bD 3 = 7779706 0372624 b a_ MIL-T-1956D (GL) 4. QUALITY ASSURANCE PROVICSIONS * 4.1 Responsibility for inspection.- Unless otherwise specified in the contract or purchas
45、e order, the supplier is responsible for the performance of ail inspection requirements as specified herein. specified in the contract or order, the supplier may use his awn or any other facilities suitable for the performance of the inspection requirenents speci- fied herein, unless disapproved by
46、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. Except as otherwise 4.1.1 Certificates of compliance.- Where certificates
47、 of compliance are submitted, the Government reserves the right to check test such items to determine the validity of the certification. * 4,2 First article inspection.- When required, the preproduction samples submitted in accordance with 3.1 shall be examined as specified in 4.3.2.1 for compliance
48、 with design, construction, workmanship and dimensional requirements and shall be tested for physical characteristics in accordance with 4.3.22 to the extent applicable. 4.3 Inspection.- Sampling for inspection shall be performed ia accordance with MIL-STR-105, except where otherwise indicated herei
49、nafter. 4.3.1 Inspection of materials and components,- In accordance with 4.1 above, components and materials shall be inspected and tested in accordance with all the requirements of referenced specifications and standards unless otherwise excluded, amended, modified or qualified in this specification or applicable documents. In addition, testing shall be performed 011 components and materals listed in table III for the chara
