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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2006 SAE InternationalAll rights reserved. No part of this publication may be
3、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: 724-776-4970 (outside USA)Fax: 724-
4、776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgWebbing, Woven NylonFor DeceleratorsFOREWORDThis Revision contains format/editorial changes only.1. SCOPE:1.1 Form: This specification and its supplemental detail specifications covers a woven nylon in the form of webbing.1.2 Application
5、: Primarily for use in construction of decelerators.1.3 Classification: Webbing is classified by width and breaking strength as shown in the titles of the detail specifications.1.4 Safety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this
6、 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 the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary me
7、asures to ensure the health and safety of all personnel involved.AEROSPACE MATERIAL SPECIFICATIONAMS 3718BIssued OCT 1985 Revised SEP 1998Reaffirmed JAN 2006Superseding AMS 3718ACopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted wi
8、thout license from IHS-,-,-AMS 3718B SAE AMS 3718B- 2 -2. APPLICABLE DOCUMENTS: The following publications form a part of this specification to the extent specified herein. The applicable issue of referenced publications shall be the issue in effect on the date of the purchase order.2.1 U.S. Governm
9、ent Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.FED-STD-4 Glossary of Fabric ImperfectionsFED-STD-191 Textile Test MethodsMIL-P-43334 Packaging of Textile Webbing and TapeMIL-STD-105 Sampling Procedures and Tables for
10、Inspection by Attributes2.2 Other Publications: Available from Federal Trade Commission, Washington, DC 20580.Textile Fiber Products Identification Act, Rules and Regulations3. TECHNICAL REQUIREMENTS: 3.1 Detail Specifications: The requirements for a specific webbing shall consist of all requirement
11、s specified herein in addition to requirements specified in the detail specification. In case of conflict between requirements of this specification and an applicable detail specification, requirements of the detail specification shall govern.3.2 Material: The yarn shall be a bright, high tenacity,
12、light and heat resistant nylon and shall be a polyamide prepared from hexamethylene diamine and adipic acid or its derivatives. It shall have a melting point not lower than 244 C (471 F). Supplier shall certify that the yarn has not been subjected to any type of bleaching process. Yarn shall be of t
13、he filament count, denier, twist, and color and webbing shall be of the weave specified in the applicable detail specification.3.3 Properties of Yarn: Shall be as specified in the applicable detail specification, determined in accordance with test methods specified in 4.5. The final ply of the warp
14、and filling yarns shall have not less than 2.5 turns per inch (25.4 mm) and be twisted together (plied) in one operation.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3718B SAE AMS 3718B- 3 -3.
15、4 Properties of Webbing: Shall be of natural color and meet the requirements specified in the detail specification, determined in accordance with test methods specified in 4.5.3.5 Quality: Webbing, as received by purchaser, shall be clean, evenly woven, and free from foreign materials and from imper
16、fections detrimental to usage of the webbing.3.5.1 Imperfections: Acceptability of each lot of webbing shall be based on imperfections defined in FED-STD-4 and as specified in Table 1.3.5.2 Yard-by-Yard (Meter-by-Meter) Examination: The required length of each roll shall be examined on both sides an
17、d visual imperfections classified as in Table 1. Imperfections found shall be counted, regardless of their proximity to each other, except where two or more imperfections represent a single local condition of the webbing, in which case only the more serious imperfection shall be counted. A continuou
18、s imperfection shall be counted as one imperfection for each warpwise yard (meter), or fraction thereof, in which it occurs. The lot shall be unacceptable if one or more critical imperfections appear in the sample. The lot size shall be expressed in units of 1 linear yard (1 linear meter) each. An a
19、pproximately equal length shall be examined from each roll selected.TABLE 1 - Classification of ImperfectionsImperfection Description Critical MinorAbrasion marks Resulting in rupture of yarns, or in nap sufficient to obscurethe identity of any yarn over 10% of width or 1 inch(25 mm) in length.XBrok
20、en or missingendTwo or more regardless of length or a single end over 6 inches (152 mm) in length.Single end under 6 inches (152 mm) but over 0.25 inch(6.4 mm).XXBroken or missingpickTwo or more regardless of extent.Note: The filling tie-in or joining shallnot be construed as an imperfection of any
21、nature.XCoarse or lightfilling barResulting in clearly visible difference in stiffness or thickness of webbing and extending more than 0.25 inch(6.4 mm) in the length direction.XTwist or distortion Webbing will not lay flat upon application of manual pressure due to twist or distortion.XCut, hole, o
22、r tear Any cut, hole, or tear. XCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3718B SAE AMS 3718B- 4 -Drop-ply Clearly visible on more than 2 ends within the same length and extending over 9 li
23、near inches (229 linear mm) or more.Clearly visible on 1 or 2 ends within the same length andextending over 9 linear inches (229 linear mm) or more.XXEdges inferior Cut, frayed, torn, slack, or otherwise poorly constructedand over 0.25 inch (6.4 mm) in length.XFloat or skips Three or more, 0.50 inch
24、 (12.7 mm) or more in combinedwarp and filling directions or single float or skip overmore than 1 inch (25 mm).Three or more, under 0.50 inch (12.7 mm) in combined warp or filling directions or single float or skip over more than 0.50 inch (12.7 mm) but not over 1 inch (25 mm), if in warp, nor more
25、than 0.25 inch (6.4 mm) of the width but not over 1 inch (25 mm), if in filling.XXHitchback crack Clearly visible opening between adjoining picks, or warpwise tension area over part of the width resulting in visible light and heavy places.XJerked-in filling,slough-off slugA clearly visible loop of f
26、illing pulled in at the edges.Kinks More than 3 kinks in any 9 linear inches (229 linear mm). XKnots More than 1 knot in any 9 linear inches (229 linear mm).One knot every 2 yards (2 m) with untrimmed endsextending from surface of webbing.XXMispick, doublepick.Two or more across the full width.Singl
27、e across the full width.XXSlack end Two or more jerked in between picks, or forming clearlyvisible loops on the surface.Single jerked in between picks or forming clearly visibleloops on the surface.XXSlub or slug, gout More than twice the thickness of the yarn (or ply, if plied). XSmash Any smash. X
28、Spot, stain, orstreakAny clearly visible dirt, rust, grease, oil spot, stain, or streak. 3.5.2.2Tight end Clearly visible up to 12 inches (305 mm) in length. XWrong draw Extending more than 9 inches (229 mm). XTABLE 1 - Classification of Imperfections (Continued)Imperfection Description Critical Min
29、orCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3718B SAE AMS 3718B- 5 -3.5.2.1 Clearly visible, as used in Table 1, is defined as being visible at an inspection distance of 3 feet (1 m).3.5.2.
30、2 Any spot, stain, or streak up to 12 inches (305 mm) in length that can be covered with an approved white spotter shall be minor. Any spot, stain, or streak that cannot be covered or is longer than 12 inches (305 mm) shall be a critical imperfection.3.5.3 Overall Examination: Each imperfection list
31、ed below shall be counted no more than once in each roll examined. The sample unit for this examination shall be one roll. The sample size and acceptance number shall be as shown below. The imperfections are objectionable odor, unclean throughout, uneven weaving throughout, and identification ticket
32、 missing or nonconforming.3.5.3.1 If a lot contains fewer than 3 rolls, each roll in the lot shall be examined.3.5.4 Length Examination: The units shall be examined for gross length. Any gross length found to be less than the minimum or more than the maximum length specified, or gross length found t
33、o be more than 2 yards (2 m) below the gross length marked on the ticket shall be considered an imperfection with respect to length. Any roll containing more than 3 pieces, or a piece under 10 yards (9 m) in length, shall be considered an imperfection with respect to length.4. QUALITY ASSURANCE PROV
34、ISIONS: 4.1 Responsibility for Inspection: The vendor of the webbing shall supply all samples for vendors tests and shall be responsible for performing all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the webbing confo
35、rms to the requirements of this specification and the applicable detail specification.TABLE 2Lot SizeYardsLot SizeMetersSampleSizeRollsMax No.ImperfectionsAcceptedin SampleUp to 1,300, incl Up to 1.189, incl 1 0Over 1,300 to 3,200, incl Over 1,189 to 2,926, incl 3 0Over 3,200 to 8,000, incl Over 2,9
36、26 to 7,315, incl 5 0Over 8,000 to 22,000, incl Over 7,315 to 20,117, incl 7 0Over 22,000 to 110,000, incl Over 20,117 to 100,584, incl 10 1Over 110,000 Over 100,584 15 1Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without li
37、cense from IHS-,-,-AMS 3718B SAE AMS 3718B- 6 -4.2 Classification of Tests: 4.2.1 Acceptance Tests: Tests for all technical requirements are acceptance tests and preproduction tests and shall be performed prior to or on the initial shipment of webbing to a purchaser, on each lot, and when a change i
38、n ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required.4.2.1.1 For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed
39、 by the procuring activity, contracting officer, or request for procurement.4.3 Sampling and Testing: Shall be as follows:4.3.1 For Acceptance Tests: Each lot of webbing shall be visually examined as required below for roll quality (3.5) and samples taken at random for all other tests. The number of
40、 determinations for each requirement shall be as specified in the applicable test procedure or, if not specified therein, not less than three.4.3.1.1 Yarn Tests: Prior to weaving the webbing, the yarn shall be sampled as specified below, using 500 yards (457 m) as the sample unit. The lot shall be u
41、nacceptable if one or more units fail to meet any requirement specified.4.3.1.2 Webbing Tests: Unless otherwise specified in the applicable test methods, test requirements apply to the average of the determinations made on a sample unit. The sample unit for testing shall be 15 linear yards (14 linea
42、r m). The sample size shall be as shown below:TABLE 3Lot SizePoundsLot SizeKilogramsSampleSizeUp to 800, incl Up to 363, incl 2Over 800to 22,000, incl Over 363 to 9979, incl 3Over 22,000 Over 9979 5TABLE 4Lot SizePoundsLot SizeKilogramsSampleSizeUp to 800, incl Up to 363, incl 2Over 800to 22,000, in
43、cl Over 363 to 9,979, incl 3Over 22,000 Over 9,979 5Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3718B SAE AMS 3718B- 7 -4.3.1.2.1 Overall Examination: The unit for this examination shall be o
44、ne roll. The rolls examined shall be those selected for the yard-by-yard (meter-by-meter) examination and shall be in accordance with 3.5.2.4.3.1.2.2 Yard-by-Yard (Meter-by-Meter) Examination: The unit for this examination shall be 1 linear yard (1 linear m). The sample size shall be in accordance w
45、ith MIL-STD-105, Inspection Level III. The number of rolls from which the sample is to be selected shall be in accordance with 3.5.3.4.3.1.2.3 Length Examination: 4.3.1.2.3.1 Individual Roll: The unit for this examination shall be one roll. The pieces examined shall be selected for the yard-by-yard
46、(meter-by-meter) examination and shall be in accordance with 3.5.2.4.3.1.2.3.2 Total Length of Sample: The lot shall be unacceptable if the total length of the actual gross length of the rolls in the sample is less than the total gross lengths marked on the piece tickets.4.3.1.3 A lot shall be all w
47、ebbing of a single size and configuration produced in a single production run under the same fixed conditions and presented for vendors inspection at one time. A lot may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained.4.3.1.4 When
48、a statistical sampling plan has been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan in lieu of sampling as in 4.3.1 and the report of 4.6 shall state that such plan was used.4.3.2 For Preproduction Tests: As agreed upon by purchaser and vendor.4.4 Approval: 4.4.1
49、 Sample webbing shall be approved by purchaser before webbing for production use is supplied, unless such approval be waived by purchaser. Results of tests on production webbing shall be essentially equivalent to those on the approved sample webbing. 4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, and methods of inspection on production webbi
