1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2017 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AMS3793C AEROSPACE MATERIAL SPECIFICATION AMS3793 REV. C Issued 1986-04 Stabilized 2013-09 Revi
5、sed 2017-08 Superseding AMS3793B Tape and Webbing, Textile, Para-Aramid Intermediate Modulus RATIONALE The purpose of this revision is to correct a typo in 8.6: change MIL-C to MIL-T in the header paragraph. 1. SCOPE 1.1 Form This specification and its supplementary detail specifications cover para
6、aramid in the form of tape and webbing. 1.2 Application These products have been used typically in construction of parachutes and their accessories, but usage is not limited to such applications. 1.3 Classification Tape and webbing shall be classified by width and weight as shown in the detail speci
7、fications. 1.4 Safety - Hazardous Materials While the materials, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of t
8、he user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms
9、 a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that d
10、ocument shall apply. SAE INTERNATIONAL AMS3793C Page 2 of 18 2.1 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D123 Standard Terminology Relating to Textiles 2.2 U.S. Government Publi
11、cations Copies of these documents are available online at http:/quicksearch.dla.mil. FED-STD-191 Textile Test Methods MIL-P-4334 Packaging of Textile Webbing and Tape 2.3 Other Publications Available from the Federal Trade Commission, 600 Pennsylvania Avenue, NW, Washington, DC 20580. Textile Fiber
12、Products Identification Act, Rules and Regulations 3. TECHNICAL REQUIREMENTS 3.1 Detail Specifications The requirements for a specific product shall consist of all requirements specified herein in addition to the requirements specified in the applicable detail specification. In case of conflict betw
13、een the requirements of this specification and an applicable detail specification, requirements of the detail specification shall govern. 3.2 Material Shall be tape and webbing woven from para-aramid, intermediate modulus type of yarn (see 8.3). Warp yarns shall be nominally two turns per inch (25.4
14、 mm). Plied yarns shall be made by twisting together the specified number of zero twist singles, as supplied by the producer. Filling yarns shall have the yarn producers twist only. 3.3 Properties Shall be as specified in the applicable detail specification. Tests shall be performed on the tape and
15、webbing supplied and in accordance with test methods specified in 4.5 insofar as practicable. 3.4 Quality Tape and webbing as received by purchaser, shall be clean, evenly braided, and free from foreign materials and from imperfections detrimental to usage of the tape and webbing or defects exceedin
16、g those described in 4.3.1.3. 3.4.1 Imperfections Refer to ASTM D123 “Standard Terminology Relating to Textiles” for definitions of terms used herein. Acceptability of each weight of tape and webbing shall be based on faction listed in Table 1. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for
17、Inspection The manufacturer of the product shall supply all samples and shall be responsible for all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the requirements of this specification. SAE INTE
18、RNATIONAL AMS3793C Page 3 of 18 4.2 Classification of Tests Tests for all technical requirements are acceptance tests and shall be performed on each lot, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.2.
19、1 Preproduction Tests All technical requirements are preproduction tests and shall be performed prior to or on the initial shipment of the manufacturer, when a change in ingredients and/or processing requires approval as in 4.4.2 and when purchaser deems confirmatory testing to be required. 4.2.2 Fo
20、r direct U.S. Military procurement, substantiating test data, and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the procuring activity, the contracting officer, or the request for procurement. 4.3 Sampling and Testing Shall be as follows: 4.3.
21、1 For Acceptance Testing Each lot of tape and webbing shall be visually examined for quality (3.4) and sampled at random for all other tests. The number of determinations for each requirement shall be as specified in the applicable test procedure or, if not specified therein, not less than three. 4.
22、3.1.1 A lot shall be all product of a single weight and configuration produced in a single production run under the same fixed conditions and presented for manufacturers inspection at one time. An inspection lot shall not exceed 5000 yards (4570 m). 4.3.1.2 Properties specified in the applicable det
23、ail specifications apply to the average of determinations made on a sample unit. Sample size shall be as shown in Table 1. The sample unit for testing shall by 5 yards (4.5 m). The lot size shall be expressed in units of 1 linear yard (0.9 linear m). The lot shall be unacceptable if one or more unit
24、s fail to meet any of the specified requirements. Table 1 - Sample size Lot Size Yards Lot Size Meters Sample Size Over Up to 800, incl Up to 730, incl 2 Over 800 to 5000, incl Over 730 to 4570, incl 3 Over 5000 to 22000, incl Over 4570 to 20115, incl 5 Over 22000 incl Over 20115 to incl 7 4.3.1.3 Y
25、ard-by-Yard (0.9 m by 0.9 m) Examination The required length of each roll shall be examined on both sides and visual defects classified as listed in Table 2 “clearly visible” shall be interpreted as visible at normal inspection distance of approximately 3 feet (1 m). All defects found shall be count
26、ed regardless of their proximity to one another, except where two or more defects represent a single local condition of the tape or webbing, in which case only the more serious defect shall be counted. A continuous defect shall be counted as one defect for each warpwise yard (0.9 m) or fraction in w
27、hich it occurs. The acceptance shall be 2.5 defects per 100 units and the lot shall be unacceptable if one or more critical defects appear in the sample. The lot size shall be expressed in units of 1 linear year (0.9 linear m) each. An approximately equal length shall be examined from each roll sele
28、cted. The number of rolls or spools from which the sample is to be selected shall be in accordance with Table 3, except that if a lot contains less than three rolls or spools, each roll or spool in the lot shall be examined. SAE INTERNATIONAL AMS3793C Page 4 of 18 Table 2 - Classification of defects
29、 Defect Description Classification Critical Minor Abrasion Marks Resulting in rupture or yarns or in nap sufficient to obscure the identity of any yarn over 10% of width or 1 inch (25 mm) in length. X Yarns (filling Two yards per shed. X Broken or Missing End Two or more regardless of length or a si
30、ngle end over 6 inches (152 mm) in length. X Single end under 6 inches (152 mm), but over 0.25 inch (6 mm). X Broken or Missing Pick Two or more regardless of extent. The filling tie-in or joining shall not be. X Coarse or Light Filling Bar Resulting in visible difference in stiffness or thickness o
31、f webbing and extending over 0.25 inch (6 mm) in the length direction. X Resulting in visible difference in stiffness or thickness of webbing and extending 0.25 inch (6 mm) or under in the length direction. X Twist or Distortion Webbing will not lie flat upon application of manual pressure due to tw
32、ist or distortion. X Cut, Hole, or Tear Any cut, hole, or tear. X Drop-ply Clearly visible on more than 2 ends within the same length and extending 9 linear inches (229 linear mm) or over. X Clearly visible on 1 or 2 ends within the same length and extending under 9 linear inches (229 mm). X Edges F
33、rayed, slack, or otherwise poorly constructed and over 0.25 inch (6 mm) in length. X Floats or Skips Three or more, 0.5 inch (13 mm) or over in combined warp and filling directions or single float or skip over 1 inch (23 mm). X Three or more, under 0.5 inch (13 mm) in combined warp or filling direct
34、ions or single float or skip over 0.5 inch (13 mm), but not over 1 inch (25 mm), if in warp; or over 0.25 inch (6 mm) of width, but not over 1 inch (25mm) if in filling. X Hitchback Crack Clearly visible opening between adjoining picks, or warpwise tension area over part of the width resulting in vi
35、sible light and heavy places. X SAE INTERNATIONAL AMS3793C Page 5 of 18 Jerked-in Filling, Slough-off, Slug A clearly visible loop of filling pulled in at the edges. X Kinks More than three kinks in any 9 linear inches (225 linear mm). X Knots More than on knot in 9 linear inches (229 mm). X One kno
36、t every 2 yards (1.8 m) with untrimmed ends extending from the surface of the webbing. X Mispick, Double Pick Two or more across the full width. X Single across the full width. X Slack End Two or more in the same length, jerked in between the picks, or forming clearly visible loops on the surface. X
37、 Single jerked in between picks or forming clearly visible loops on the surface. X Slub, Slug, or Gout More than twice the thickness of the yarn (or ply, if plied). X Smash Any smash. X Spot, Stain, or Streak Any clearly visible. X Tight End Clearly visible up to 12 inches (305 mm) in length. X Wron
38、g Draw Extending over 9 inches (229 mm). X Width Beyond specified tolerances. X 4.3.1.4 Overall Examination The following defects shall be counted no more than once in each roll or spool examined. The sample unit for this examination shall be one roll or spool. Sample size and acceptance number shal
39、l be as in Table 3. Uncleanliness throughout Uneven weaving throughout Not labeled in accordance with Textile Fiber Products Identification Act SAE INTERNATIONAL AMS3793C Page 6 of 18 Table 3 - Sampling plan Lot Size Yard Lot Size Meters Sample Size in Rolls or Spools Number of Defects Acceptable, M
40、aximum Up to 1200, incl Up to 1095, incl 3 0 Over 1200 to 3200, incl Over 1095 to 2925, incl 5 0 Over 3210 to 10000, incl Over 2925 to 9145, incl 8 0 Over 10000 to 35000, incl Over 9145 to 32005, incl 13 0 Over 35000 to 150000, incl Over 32005 to 137160, incl 20 1 Over 150000 Over 137160 32 2 4.3.1.
41、5 Length Examination 4.3.1.5.1 Individual Rolls or Spools Each roll or spool in the sample shall be examined for the defects listed below. The sample unit for this examination shall be one roll or spool. The sample size and acceptance number shall be as specified in Table 3. Gross length more than 2
42、 yards (1.8 m) less than the length marked on the piece ticket Any piece less than 20 yards (18 m) in length Any roll containing more than three pieces 4.3.1.5.2 Total Yards (m) in Sample The lot shall be unacceptable if the total of the actual gross lengths of rolls or spools in the samples selecte
43、d in accordance with Table 3 is less than the total of gross lengths marked on the roll or spool tickets. 4.3.1.6 A statistical sampling plan acceptable to purchaser may be used in lieu of sampling as in 4.3.1. 4.3.2 For Preproduction Tests Acceptable to purchaser. 4.4 Approval 4.4.1 Sample tape and
44、 webbing shall be approved by purchaser before tape and webbing for production use is supplied, unless such approval be waived by purchaser. Results of tests of production tape and webbing shall be essentially equivalent to those on the approved sample tape and webbing. 4.4.2 Manufacturer shall use
45、ingredients, manufacturing procedures, processes, and methods of inspection on production tape and webbing which are essentially the same as those used on the approved sample. If necessary to make any change in material or processing, in type of equipment for processing, or in manufacturing procedur
46、es, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample tape or webbing. Production tape or webbing made by the revised procedure shall not be shipped prior to receipt of reapproval. SAE INTERNATIONAL AMS3793C Page
47、 7 of 18 4.5 Test Methods Shall be as specified in Table 4 and in 4.5.1; a certificate of compliance from the vendor will be acceptable for material identification and denier: Table 4 - Test methods Property FED-STD-191 Test Method Breaking Strength 4108 (Except for strain-rate, see 4.5.1) Denier 40
48、21 Twist 4052 Weight 5041 Texture Ends, Face and Back Warp 5050 Picks per inch (25.4 mm) 5050 Width 5020 Weave Visual 4.5.1 Breaking Strength Speed of pulling jaw shall be 2 inches 0.5 inch (51 mm 12 mm) per minute. Testing shall be performed using the double pin jaw design as specified in 4.5.1.1.
49、In case of dispute of the test values, the higher values obtained with either the double pin jaws or the split drum jaws, separately, are acceptable. The lot is not acceptable if any single determination is below the specified minimum. 4.5.1.1 Double Pin Jaw Design 4.5.1.1.1 Alternate Jaw Design Shall be identified as the double pin jaws as specified in Figures 1 through 7. 4.5.1.1.2 Machine Adjustment Mount
