1、1- -I_ MIL-C-4232D 40 = 777790b 0073377 4 M1 L- C- 4 2 3 2 I) MIL- C- 4 2 37 C 9 February 1968 MI LIT AKY SPECIFICATION CORD, RAYON, WITHOUT CORE, BRAIDED This specification is mandatory for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope.- This specification cov
2、ers braided rayon cord (see 6.1). 1.2 Classification.- The cord shall be of the following types as speci- fied (see 6.2): Type I - 400 pounds minimum breaking strength. Type II - 1000 pounds minimum breaking strength. Type III - 1500 pounds minimum breaking strength. 2. APPLICABLE DOCUMENTS 2.1 The
3、following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein: SP ECI FI CAT IONS FEDERAL UU-T-81 - Tags, Shipping and Stock. MILITARY MIL-C-3131 - Cordage; Preparation for Delivery of. STAEDARDS F
4、EDERAL FED-STD-191 - Textile, Test Methods MILITARY MIL-STD-105 - Sampling Procedures aid Tables for Inspection by Attributes Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-4232D (Copies of specifications, standards, drawings, and publications
5、 required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting off i Cer. ) 3. REQUIREMENTS 3.1 Government and supplier purchases.- The requirements specified in 3.5 and 3.6 apply only to cord purchased direct
6、ly by the Government. All other requirements apply to cord purchased by a supplier as a component for an end item and to cord purchased directly by the Government. 3.2 Material.- The yarn used in the fabrication of the cord shall be high tenacity viscose rayon 3.0 to 4.6 grams per denier. each basic
7、 yarn shall be 1100 minimum. No chemical finishes or treatments shall be applied to specifically increase the weight or breaking strength. The denier of * 3.3 Construction and physical requirements.- The braided cord shall conform to the construction and physical requirements specified in table I wh
8、en tested as specified in 4.2.5. The cord shall be braided on braiding machines having the number of carriers (strands) specified in table I, and the machines shall be so regulated as to give a two over nnd two under conventional stitch i.e. each carrier alternating with the next carrier in directio
9、n and each strand passes alternately over and under two of the opposite strands (see 4.2.1). * 3.3.1 In the manufacture of the cord, no more than one carrier shall be When carrier ends run of they allowed to be run off per 50 feet of cord. shall be spliced a distance of 10 inches 5 1 inch in length.
10、 center of each splice shall be marked by inserting a red thread (of another fiber type) through the braid. approximately three inches on either side of the cord. shall be accomplished by a light pull on either end. The marker shall not be removed until such time as the cord is to be used in the man
11、ufacture of parachute suspension lines or other applications (see 4.2.1 and 6.1). The approximate The free ends of th emarker shall extend Removal of the marker TABLE I.- Construction and physical requirements TYPe Type Type Characteris tic I 11 III Yarn ply 1 1 1 Picks per inch: Minimum Maximum 9 5
12、9 10 5-1/2 Nuniber of carriers 16 16 Length per pound, feet (minimum) 126 60 3-1/2 4 16 39 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-4232D - 40 W 9999906 0097399 8 W MIL-C-4232D TABLE I.- Construction and physical requirements (contd)
13、me Type Type Characteris tic I II III Breaking strength, pounds (minimum) 40 O 1000 1500 Elongation, percent - (minimum) 14 12 3.4 Color.- Unless otherwise specified (see 6.2), the cord shall be furnished in natural color or tinted methyl orange. 3.5 Put-up.- Unless otherwise specified (see 6.2), th
14、e cord shall be furnished in 525-yard spools (reels) and shall be wound so that each turn and layer is free from entanglement. Each spool (reel) shall contain not more than three pieces and no piece shall be less than 5 yards in length. A plus tolerance of 10 percent shall be allowed on the length o
15、f spool (reel) specified. The ends of all cord shall be taped, served or otherwise secured to prevent fraying. joining of cord ends to form 8 continuous length of cord. There shall be no knot, splice or otherwise * 3.6 Identification.- Each spool (reel) of cord shall have a ticket (identification ta
16、g) or label attached to it for identification purposes, The ticket shall conform to the requirements for type E, class 1, size 4 or 5 of -T-81. The ticket shall be made of not less than 15 point paper stock and shall have a minimum tearing resistance of both directions (total) of 850 grams when test
17、ed as specified in -T-81. When labels are used, the label shall be attached in such a manner as to remain in place and be clearly legible until all cord has been removed. All ticket or label entries shall be legibly printed, stamped, or typed with water insoluble ink. The ticket or label shall conta
18、in the following information: Stock number Nomen cl at Ure Specification number Leng th and type Contract number and date Date of manufacture (month and year) Suppliers name 3.7 Workmanship.- The braided cord shall conform to the quality and grade of product established by this specification. The oc
19、currence of defects shall not exceed the applicable acceptable quality levels. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- MIL-C-423ZD 40 7977706 0097400 O - - MIL-C-4232D 4. QUALITY ASSURANCE: PROVISIONS 4.1 Responsibility for inspection.-
20、Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of aU inspection requirements as specified herein. specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection req
21、uirements specified 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. Except as otherwise 4.1
22、.1 Certificate of compliance.- Where certificates of compliance are submitted, the Government reserves the right to check test such items to determine the validity of the certification. 4.2 Inspection.- Sampling for inspection shall be performed in accord- ance Kith MIL-STD-105, except where otherwi
23、se indicated hereinafter. 4.2.1 Component and material inspection.- In accordance with 4.1 above, components and materials shall be tested in accordance with all requirements of referenced specifications, drawings and standards unless otherwise excluded, amended, modified or qualified in the specifi
24、cation or applicable purchase documents. requirements in table II and a suppliers certificate of compliance thereto shall be furnished and will be accepted for the requirement. shall also certify that the provisions cited in 3.3 and 3.3.1 have been adhered to in the manufacture of the cord. In addit
25、ion, inspection shall be performed for the The supplier TABLE 11.- Component tests Characteris tic Requirement reference Material 3.2 Yarn denier 3.2 Tenacity 3.2 Chemical finishes 3.2 Yarn ply Table I 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
26、,-I MIL-C-4232D 40 M 799970b 0097401 2 MIL- C - 4 2 3 2 U * 4.2.2 Zxamination of the end item for visual defects.- The defects listed in table III shall be counted regardless of their proximity to each other. The lot size shall be expressed in units of one spool (reel) each. The acceptable quality l
27、evel (AQL) shall be 4.0 major defects per 100 units and the in- spection level shall be level III. sampling inspectlon for major defects shall be cause for rejection of the lot represented by the sample. The sample unit shall be one spool (reel). Any critical defect found during TABLE III.- Visual e
28、xamination C1 as s i fi cat i on Examine Defect c Critical Major Appearance and Any cut. workmanship Abrasion mark, chafed, or distortion in orientation of yarn Kink or knot. Unevenly braided resulting in open place, break in con- tinuity of braid or soft spot. per 50 feet of cord. loose strand or e
29、nd. L/ More than one carrier run-off Float, broken, projecting or Color Not as specified. x x X X Cleanness Spot or stain, clearly noticeable. 2-/ X Identi Pic ation Omitted, incorrect , illegible label or ticket or not as specified. X - i/ STlice marker thread not applicable. I 2/ At normal inspect
30、ion distance (approximately 3 feet). 4.2.3 Examination for length and winding.- examination shall be one spool (reel), S-3 and tne AQL shall be 4.0 percent defective. number of spools (reels) in the lot. winding shall be considered to exist if any of the following are determined during inspection: T
31、he sample unit for this The inspection level shall be level !J%e lot size chdl be the Defects with regard to length and 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-4232D a. The length is less than specified or more than 10 percent in exce
32、ss of the length specified. b. Lengbh is less than marked on ticket or label. c. Improperly or not firmly wound, resulting in kinking, knotting, entangling or slippage during unwinding or otherwise affecting free unhampered unwinding of cord. d. Put-up not as specified, i.e., not spools (reels). l e
33、. f, g. h. Any end not taped or served. Any spool (reel) containing more than 3 pieces. Any piece less than 5 yards in length. Knot, splice or otherwise joining of cord ends to make a continuous length of cord. h. 2.4 Examination of preparation for delivery requirements. - An examination shall be ma
34、de to determine that the packaging, packing and marking complies with the section 5 requirements, be in accordance with the provisions of MIL-C-3131, except that the inspection level shall be S-2 and the AQL shall be 2.5 defects per hundred units. The examination shall 4.2.5 Testing of the end item,
35、- lhe methods of testing specified in FED-STD-191, wherever applicable, and as listed in table V shall be followed. The physical and chenical values specified in Section 3 apply to the average of the determinations made on a sample unit for test purposes as specified in the applicable test methods.
36、rejection numbers shall be in accordance with table IV. shall contain the individual values utilized in expressing the final result. The sample unit for testing shall be one spool (reel) of cord. size shall be expresse in units of one spool (reel). shall be performed under Standard Testing Condition
37、s as defined in F”D-STD-191. The sample size and acceptance and Al1 test reports The lot All physical tests TABLE IV.- Sampling for tests No. of units in lot Sample size 800 or less 801 up to and including 22,000 22,001 and over 2 3 5 6 Provided by IHSNot for ResaleNo reproduction or networking perm
38、itted without license from IHS-,-,-MIL-C-4232E TABLE V.- Test methods - Require- Number of deter. ment Test per indiv. Results reported Characteris tic reference metho sample unit as Picks per inch Table I 4.2.5.1 1 Pass or fail Number of Table I Visual 1 carriers Pass or fail Length per pound Table
39、 I 6004 - - Breaking strength Table I 6016 - - Elongation lable I 6016 - - * 4.2.5.1 Determination of picks per inch.- Picks per inch shall be counted Visually with the cord in a relaxed state without tension and so positioned that the repeat of the stitch pattern creates a straight line parallel to
40、 the axis of the cord. 5. PRFPARATION FOR DELIVERY 5.1 Packaging.- Packaging shall be level A or C as specified (see 6.2). 5.1.1 Level A and C.- The cord, put up on spools (reels) as specified in 3.5, shall be packaged in accordance with the applicable requirements of MIL-C-3131 5.2 Packing.- Packin
41、g shall be level A, U, or C as specified (see 6.2). 5.2.1 Levels A, B and C.- The cord shall be packed in accordance with the applicable requirements of MIL-C-3131. 5.3 Marking.- In addition to any special markings required by the contract or order, interior packages and shipping containers shall be
42、 marked in accord- ance with MIL-C-3131, 6. NWES 6.1 Intended me.- The cord is intended for use as suspension lines of cargo parachutes and in other aerial delivery applications. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-qZ32D 90 W 7779
43、706 0077404 8 6.2 Ordering data.- Procurement documents should specify the following: (a) (b) Type required (see 1.2). (c) (d) (e) Title, number, and date of this specification. Color if other than natural or tinted methyl orange Put-up if other than specified (see 3.5). Selection of applicable leve
44、ls of packaging and packing (see 3.4). (see 5.1 and 5.2)- 6.3 The margins of this specification we marked with an asterisk to indicate where changes (additions, modifications, corrections, deletions) fromthe previous issue were made. This was done as a convenience only and the Government assumes no
45、liability whatsoever for any inaccuracies in these notations. Bidders and suppliers are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. custodians : Army - GL Air Force - ll Preparing activity : - GL Project 30. 4020-0190 Review activities : Army - AV BA-IS Air Force - 45, 82 User activities: 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
