1、 The following commercial specification is adopted from the original military document. Revision A includes all known accepted revisions, amendments, notices, and Department of Defense (DoD) engineering changes previously developed for this item. Revisions B and forward include changes adopted to re
2、flect technology and design evolution. CORD, NYLON, BRAIDED, TUBULAR, SPLICEABLE The Parachute Industry Association makes this document available for use by Industry and Government organizations that wish to apply this specification to their products. 1. SCOPE 1.1 Scope. This specification covers tu
3、bular braided nylon cord designed specifically for telescopic splicing (see 6.3 for textile definitions). 1.2 Classification. The cord shall be of the types specified in TABLE I. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in Sections 3 and 4 of this speci
4、fication. 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 they must meet all specified requireme
5、nts documents cited in Sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government publications. 2.2.1 Government publications. The following Government publications form a part of this document (see 2.4). FEDERAL TRADE COMMISSION (FTC) 16 CFR 303 - Rules and Regulations U
6、nder the Textile Fiber Products Identification Act PIA-C-17183D 04 June 2014 Superseding PIA-C-17183C 28 August 2009 DISTRIBUTION STATEMENT: All Rights Reserved. No Part of this publication may be reproduced without prior written permission from Parachute Industry Association. Additional copies may
7、be purchased on-line from PIA Specifications and Products at: . Copyright Protected: Do Not Copy!PIA-C-17183D (Copies are available online at: www.ftc.gov or from the Federal Trade Commission, 600 Pennsylvania Avenue, N.W. Washington, DC 20580-0001. Electronic copies may also be obtained from www.ac
8、cess.gpo.gov/.) 2.3 Non-government publications. The following documents form a part of this document (see 2.4). AMERICAN SOCIETY FOR QUALITY (ASQ) ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (Copies are available online at: www.asq.org or from the American Society fo
9、r Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) ASTM INTERNATIONAL (ASTM) ASTM D 276 - Standard Test Methods for Identification of Fibers in Textiles ASTM D 1423 - Standard Test Method for Twist In Yarns by Direct- Counting ASTM D 1776 - Standard Practice for Conditioning and Testing T
10、extiles ASTM D 1907 - Standard Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method (Application for copies should be addressed to the ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19426-2959. Electronic copies may be obtained from www.astm.org.) AMERICAN ASSOC
11、IATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC) AATCC 20A - Fiber Analysis: Quantitative AATCC 81 - pH of the Water-Extract from Wet Processed Textiles Applications for copies should be addressed to: AATCC National Headquarters, P.O. Box 12215, Research Triangle Park, NC 27709-2215. Electronic copi
12、es may be obtained from www.aatcc.org.) PARACHUTE INDUSTRY ASSOCIATION (PIA) PIA-TEST METHOD-6004 - LENGTH PER UNIT WEIGHT; CORDAGE PIA-TEST METHOD-6010 - SHRINKAGE OF CORDAGE, BOILING WATER METHOD; DETERMINATION OF PIA-TEST METHOD-6016 - STRENGTH AND ELONGATION BREAKING OF CORDAGE; NON-SPLICED METH
13、OD (Electronic copies may be obtained from .) Page 2 of 10 Copyright Protected: Do Not Copy!PIA-C-17183D 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document
14、takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 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, re
15、covered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle co
16、sts. 3.3 Government and contractor purchases. The requirements specified in 3.10.1, 3.10.2 and 3.11 apply only to cord purchased directly by the Government. All other requirements apply to cord purchased by a contractor as a component for an end item and to cord purchased directly by the Government.
17、 3.4 Material. The nylon yarn used in the manufacture of this cord shall be a bright, high tenacity, heat resistant nylon 6,6 and shall have a melting point of 250 6C when tested as specified in 4.3.1. Yarns obtained from any other reaction or process shall not be used. Testing shall be as specified
18、 in 4.6.2. The cord, including the yarn entering into the construction thereof, shall conform to the requirements when tested and examined in accordance with 4.7 and 4.8. 3.4.1 Yarn construction. The yarn construction (denier and twist) shall be in accordance with TABLE 1. 3.4.2 Color. Unless specif
19、ied in the order (see 6.2), the color shall be natural. When a color is specified, the coloring shall be accomplished by dyeing the yarn before braiding or by dyeing the cord under uniform tension throughout. The use of sulfur dyes and the dyeing of cord in skeins is prohibited. 3.4.3 Twists and tur
20、ns. All cord supplied under one order must be constructed of yarn having the same twist. The turns in the ends woven from the yarn shall be in the same direction as the twists in the yarn. 3.5 Standard. The cord shall match the standard for shade and shall be equal to or better than the standard wit
21、h respect to all characteristics for which the standard is referenced (see 6.1). 3.6 Cord requirements. 3.6.1 Shrinkage. After braiding, the cord shall be heat set in continuous lengths so that the residual shrinkage shall not be greater than 3 percent. 3.6.2 Cord construction. The construction of t
22、he cord shall conform to the end, carriers, and picks per inch requirements specified in TABLE I (see 6.3 for definitions). Page 3 of 10 Copyright Protected: Do Not Copy!PIA-C-17183D 3.6.3 Cord physical requirements. The physical properties of the cord shall conform to the requirements specified in
23、TABLE I. 3.6.4 pH. The pH value of the water extract of the natural or dyed cord shall be no less than 5.5 or more than 9.0 when tested as specified in 4.4. 3.7 Cord imperfections. The following cord imperfections shall be plainly marked by a colored adhesive tape on each side of the imperfection. T
24、he cord shall be examined for these imperfections in accordance with 4.8. 3.7.1 Carrier run-off. When carrier ends run off, they shall be spliced a distance of five to ten inches. In splicing, the outgoing carrier ends shall be joined with the new ends and hand braided for four to five picks and the
25、 tail of the splice shall be run into the center of the braided cord. 3.7.2 Detrimental imperfections. The following imperfections affect the strength, durability and end use of the product; permissible limits shall be as specified in 3.7.2.1: a. Kinks b. Thick and thin sections c. Missing ends d. B
26、roken ends projecting from the surface Note: Loose ends, which appear at the surface due to bobbin changes, are allowable if neatly clipped even to the surface of the cord. e. Knots in plied yarn. Note: The occasional knot in single yarns prior to twisting into ends are allowable. 3.7.2.1 Permissibl
27、e limits on detrimental imperfections. Permissible limits on the detrimental imperfections of 3.7.2 shall be: a. One imperfection within each 10 yard length b. No imperfection within 10 yards of each end of the cord. 3.8 Allowance for imperfections. Under any contract or order, one additional yard o
28、f cord shall be supplied for each imperfection. 3.9 Date of Manufacture (see 6.2). When required by the procurement document the textile manufacturer shall properly identify the age of the textile materials by placing a tag on the finished goods or label on the containers identifying the specificati
29、on to which the material is manufactured, the lot number and the date of manufacture. The date of manufacture is defined as the date (month and year) of the last manufacturing process that affects the physical characteristics of the material. 3.10 Spooling. 3.10.1 Spooled lengths. Shall be as specif
30、ied by the procuring activity (see 6.2), and wound so that each turn and layer is free from entanglement. A plus tolerance of 10 percent shall be allowed on the length specified. Page 4 of 10 Copyright Protected: Do Not Copy!PIA-C-17183D 3.10.2 Spooled ends. The ends of the cord shall be heat sealed
31、, securely joined and taped to the cord to prevent fraying. 3.11 Identification. Each unit pack (spool/reel) of cord, interior and exterior container shall be marked per contract or purchase order requirements. 3.12 Delivery. The spools shall be prepared for delivery in accordance with Section 5. TA
32、BLE I Construction and physical requirements. Notes: 1/ See paragraph 3.4.3 2/ The braiding machine shall be regulated to give a two over, two under conventional stitch 3/8 carriers of 1 end each, 8 carriers of 2 ends each, alternately 4/8 carriers of 2 ends each, 8 carriers of 3 ends each, alternat
33、ely 5/ 12 carriers of 4 ends each, 12 carriers of 5 ends each, alternately 6/12 carriers of 5 ends each, 12 carriers of 6 ends each, alternately 7/The pick count, as used herein, is defined as the number of carrier crossings per inch in a single straight line in the longitudinal direction of the cor
34、d8/Pick count shall have a tolerance of 10 percent. 4. VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: Yarn End Carriers Cord Cord Type Denier Yarn twist 1/ Ply Turns per inch 1/ Number of carriers 2/ Ends per carrier Picks per i
35、nch 7/&8/Weight yards/lb., minimum Breaking strength, pounds, minimum Elongation percentage minimum I II III IV V VI VII VIII IX X XI XII XIII XIV XV XVI XVII XVIII XIX XX XXI 70 210 210 210 210 210 210 210 210 210 210 210 210 210 210 210 840 840 840 840 840 S or Z S or Z S or Z S or Z S or Z S or Z
36、 S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z S or Z 1 1 3 3 3 4 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 / 4 to 1 / 4 to 1 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2
37、 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 2 2/ 2 to 3/ 216 16 16 16 16 16 16 16 16 16 16 16 16 16 24 24 24 24 24 24 24 4 3 3/ 4/3 3 6 6 7 9 10 12 13 14 12 14 4 5/ 5 6/ 6 17 16 14.5 13 12 11 9.5 8.5 7.5 7 6.5 6 5.5 5.25 7 6.5 6.25 6 5.5 5.25 5 9
38、00 400 225 150 110 90 50 40 35 30 25 20 17 15 12 10 9 8 7 6 5 50 100 200 300 400 500 750 1000 1250 1500 1750 2000 2250 2500 3000 3500 4000 4500 5000 5500 6000 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Page 5 of 10 Copyright Protected: Do Not Copy!PIA-C-17183D a. First article in
39、spection (see 4.2) b. Conformance inspection (see 4.3). 4.2 First article inspection. The first article submitted in accordance with 3.1, shall be inspected as specified in 4.4 through 4.8 for compliance with design, construction, workmanship and dimensional requirements. 4.3 Conformance inspection.
40、 Sampling for inspection shall be performed as specified in this document unless otherwise specified in the contract or order. 4.3.1 Component and material inspection. In accordance with 4.1 above, components and materials shall be inspected in accordance with all the requirements of referenced spec
41、ifications, drawings, and standards unless otherwise excluded, amended, modified or qualified in this specification or applicable procurement documents. 4.4 Tests. 4.4.1 Yarn tests. From each inspection lot, three one-foot length samples of cord shall be taken from three different reels. These sampl
42、es shall be representative of the batch or lot of yarn (see 4.4) used in the manufacture of the cord. Testing shall be in accordance with TABLE II of 4.6.1 to assure conformance with the related requirements of Section 3. Acceptance shall be in accordance with 4.8. 4.4.2 Cord tests. The lot size sha
43、ll be expressed in yards of cord. The number of sample units shall be in accordance with TABLE III. The sample unit shall be one continuous length of cord and sufficient in length to conduct all tests as required in TABLE IV of 4.6.2 to assure conformance with the related requirements of Section 3.
44、Sample units shall be randomly selected from the lot and the supplier shall certify that the samples are representative of the properties of the entire lot. The finding of any test failure shall be a cause for rejection of the lot. Acceptance shall be in accordance with 4.8. 4.5 Testing conditions.
45、4.5.1 Testing facilities. The contractor shall furnish and maintain all testing facilities, equipment and personnel necessary for performing all of the inspections specified herein. Testing equipment shall be adequate in quantity, quality and accuracy to permit performance of the specified tests. 4.
46、5.2 Atmospheric conditioning. Unless otherwise specified in the applicable test method or procedure, the tests specified herein shall be made under prevailing atmospheric conditions. In case of dispute, the tests shall be made on specimens that have been preconditioned and then brought to Standard C
47、onditions as specified in ASTM D 1776. 4.6 Test methods. 4.6.1 Yarn test methods. The applicable sampled cord of 4.4.1 shall be tested in accordance with the test methods specified in TABLE II to assure conformance with the related requirements of Section 3. The methods of testing specified wherever
48、 applicable and as listed in Page 6 of 10 Copyright Protected: Do Not Copy!PIA-C-17183D TABLE II shall be followed. Acceptance shall be in accordance with 4.8 and a suppliers Certificate of Compliance will be accepted as verification of the requirements of TABLE II. TABLE II Yarn tests. Requirement
49、Requirement paragraph Test method Yarn identification Yarn type (tenacity) Denier Twist Color 3.4 3.4 3.4.1 3.4.1 3.4.2 AATCC 20A or ASTM D 276 1/ ASTM D 1907 ASTM D 1423 2/ Notes: 1/Unless otherwise specified, a contractors Certificate of Compliance shall be furnished and will be accepted for the requirements. 2/Visual examination. 4.6.2 Cord test methods. The applicable sampled cord of 4.2 and 4.4.2 shall be tested in accordance with the test methods specified in TABLE IV to a
