ASTM F668-2007 Standard Specification for Polyvinyl Chloride (PVC) and Other Organic Polymer-Coated Steel Chain-Link Fence Fabric《聚氯乙烯(PVC)和其他有机聚合物涂覆的钢链环栏栅结构的标准规范》.pdf

1、Designation: F 668 07Standard Specification forPolyvinyl Chloride (PVC) and Other Organic Polymer-CoatedSteel Chain-Link Fence Fabric1This standard is issued under the fixed designation F 668; the number immediately following the designation indicates the year oforiginal adoption or, in the case of

2、revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers polyvinyl chloride and otherconforming organic polymer-coated steel c

3、hain-link fabric,coated before weaving. Polyvinyl chloride and other organicpolymer coating hereinafter will be designated as polymercoating.1.2 Fabric produced from three classes of wire coatings arecovered as follows:1.2.1 Class I consists of polymer coatings extruded overzinc-coated, aluminum-coa

4、ted, or zinc-5 % aluminum-mischmetal alloy-coated, or zinc-5 % aluminum-mischmetalalloy-coated steel wire.1.2.2 Class 2a consists of polymer coating extruded andadhered to zinc-coated, aluminum-coated, or zinc-5 %aluminum-mischmetal alloy-coated steel wire.1.2.3 Class 2b consists of polymer coating

5、fused and ad-hered to zinc-coated, aluminum-coated, or zinc-5 %aluminum-mischmetal alloy-coated steel wire.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are providedfor information only.2. Referenced Documents2.1 ASTM Standards:2A 90/A 9

6、0M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 428/A 428M Test Method for Weight Mass of Coatingon Aluminum-Coated Iron or Steel ArticlesD 1499 Practice for Filtered Open-

7、Flame Carbon-Arc Ex-posures of PlasticsF 552 Terminology Relating to Chain Link FencingF 934 Specification for Colors for Polymer-Coated ChainLink Fence MaterialsG23 Practice for Operating Light-Exposure Apparatus(Carbon-Arc Type) with and without Water for Exposureof Nonmetallic Materials3G26 Pract

8、ice for Operating Light-Exposure Apparatus(Xenon-Arc Type) with and without Water for Exposure ofNonmetallic Materials32.2 U.S. Federal Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)42.3 U.S. Military Standards:MIL-STD-129 Marking for Shipment and Storage43. Terminology3.1 Definit

9、ionsFor definitions of terms such as chain-linkfence fabric, selvage, knuckle, twist, and diamond count, seeTerminology F 552.4. Ordering Information4.1 Orders for chain-link fence fabric purchased to thisspecification shall include the following information:4.1.1 Quantity.4.1.2 Class of polymer coa

10、ting to be applied to the metallic-coated core wire.4.1.3 Color of coating (see 16.5.1).4.1.4 Size of mesh (see Table 1 ).4.1.5 Diameter of metallic-coated core wire or minimumbreaking strength, or both (see Tables 1-3).4.1.6 Height of fabric.4.1.7 Type of selvage if nonstandard (see 12.1 and 12.2).

11、4.1.8 Diamond count if nonstandard (see 9.1 and Table 2).4.1.9 Certification, if required.4.2 Any tests required other than those specifically coveredin this specification must be stipulated by the purchaser in theorder or contract.1This specification is under the jurisdiction ofASTM Committee F14 o

12、n Fencesand is the direct responsibility of Subcommittee F14.40 on Chain Link Fence andWire Accessories.Current edition approved Sept. 15, 2007. Published October 2007. Originallyapproved in 1981. Last previous edition approved in 2006 as F 668 - 06.2For referenced ASTM standards, visit the ASTM web

13、site, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from the procuring activity or as directed by the contracting office orfrom Standardizati

14、on Documents Order Desk, Bldg. 4 Section D, 700 RobbinsAve.,Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3 All rolls of fabric accepted by the purchaser shall bebilled to him on the basis

15、 of the original footage of the rollsbefore sampling, unless changed by contractual agreement.5. Materials5.1 Base MetalThe base metal shall be steel of suchquality and purity that, when drawn to the size of wire specifiedand coated with an organic polymer, the finished fencing shallbe of uniform qu

16、ality and have properties and characteristics asprescribed in the specification.5.2 Wire used for the manufacture of fabric shall meet therequirements of this specification and shall be capable of beingwoven into fabric without the polymer coating cracking orpeeling. The polymer coating shall be for

17、mulated and producedproperly to conform to the requirements of this specification.6. Manufacture6.1 Class 1 polymer-coated wire shall have the polymercoating extruded onto wire that conforms to the requirementsas shown in Table 3.6.2 Class 2a polymer-coated wire shall have the polymercoating extrude

18、d and adhered to wire that is zinc-coated by thehot-dip method, zinc-coated by the electrolytic process, oraluminum-coated by the hot-dip method.6.3 Class 2b polymer-coated wire shall have the polymercoating fused and adhered to wire that is zinc-coated by thehot-dip method, zinc-coated by the elect

19、rolytic process, oraluminum-coated by the hot-dip method. The use of a primerprior to the application of a polymer coating may be recom-mended by the polymer manufacturer.NOTE 1Under current practice, the process for producing a Class 2bPVC coating requires the use of a primer to attain chemical bon

20、ding to thesubstrate. In any event, the polymer manufacturers recommendationshould be followed.6.4 Type of metallic coating on the steel wire substrate shallbe the choice of the producer unless otherwise specified.7. Weave7.1 The wire shall be woven throughout in the form ofapproximately uniform squ

21、are mesh, having parallel sides andhorizontal and vertical diagonals of approximately uniformdimensions. The top and bottom of the fabric shall be knuckledor twisted as specified in Section 12.8. Size of Mesh8.1 The size of mesh shall conform to the requirements asshown in Table 1.8.2 The permissibl

22、e variation from the specified size ofmesh shall be 618 in. 3.2 mm for all mesh sizes over 1 in. 25mm and 6116 in. 1.6 mm for all mesh sizes 1 in. 25 mmand under.8.3 Size of mesh shall be determined by unrolling a roll offabric on a flat surface and exerting tension in accordance withthe requirement

23、s of 18.2, then measuring the minimum cleardistance between the wires forming the parallel sides of themesh.9. Diamond Count9.1 Typical diamond count for each standard height isshown in Table 2. Other diamond counts are permissible,provided that they are consistent within a lot. The purchaserhas the

24、 option to specify the typical diamond count of 4.1.8.10. Size of Wire10.1 Chain-link fabric shall be fabricated from wire diam-eters as necessary to meet the requirements of Table 1. Thediameter shall be determined as the average of two readingstaken at right angles to each other on the straight po

25、rtion of theparallel sides of the mesh and measured to the nearest 0.001 in.0.03 mm.10.2 The permissible variation from the specified diameterof the core wire over 0.105 in. 2.67 mm shall be 60.005 in.0.13 mm. The permissible variation for the specified diameteron core wires 0.105 in. 2.67 mm or les

26、s shall be 60.004 in.0.10 mm.11. Height of Fabric11.1 Chain-link fabric, unless otherwise specified by thepurchaser, shall be furnished in the standard heights shown inTable 1. Custom order fabric is available in heights to andTABLE 1 Sizes of Wire and MeshANOTE 1For custom fabric heights, see Secti

27、on 11.SpecifiedDiameterof CoreWire,in.SizeCoreWireGaugeSizeofMesh,in.Height of Fence Fabric, in.0.192 6 2 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.192 6 134 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.148 9 2 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.148 9 134 96, 108, 120, 1440.148B9114 48 60 7 8

28、4 96 108 120 1440.148 9 1 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 11 218 36, 42, 48, 60, 72,0.120 11 2 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 11 134 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120B11 114 48 60 72 84 96 108 120 1440.120 11 1 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.12

29、0 1158 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 1112 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.120 1138 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.105C1258 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.105C1212 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.105C1238 36, 42, 48, 60, 72, 84, 96, 108,

30、120, 1440.080C1458 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.080C1412 36, 42, 48, 60, 72, 84, 96, 108, 120, 1440.080C1438 36, 42, 48, 60, 72, 84, 96, 108, 120, 144ASee Table X1.1 for metric equivalents.BThis mesh size and smaller is recommended for swimming pools.CThese wire sizes should only be us

31、ed on58 in.,12 in., and38 in. mesh fabrics.See Fig. 1 for criteria on mesh dimensions.FIG. 1 Mesh Dimensions for58-in.,12-in., and38-in. FabricF668072including 240 ft. 6.56 m. The height of the fabric shall be theoverall dimension from the ends of twists or knuckles. Permis-sible variations from the

32、 specified height shall be 61 in. 25mm for standard selvage on fabric with mesh sizes 1 in. 25mm and over and 612 in. 13 mm for all fabric with meshsizes less than 1 in. 25 mm.12. Selvage12.1 Fabric with 2-in. 50.8-mm or 218-in. 54.0-mmmesh, in heights less than 72 in. 1829 mm, shall be knuckledat b

33、oth selvages. Fabric 72 in. 1829 mm high and over shallbe knuckled at one selvage and twisted at the other. These arethe standard selvages. Other selvage combinations will besupplied only if specified by the purchaser.NOTE 2Caution: Twisted selvages for fences under 72 in. 1829 mmin height are not r

34、ecommended because of consumer safety consider-ations.12.2 The selvages of fabrics with meshes of less than 2 in.50.8 mm shall be knuckled on both edges.13. Breaking Strength13.1 Wire constituting the fabric shall meet the minimumbreaking strength shown in Table 3, as determined in accor-dance with

35、Test Methods and Definitions A 370.13.2 Specimens to establish conformance to this require-ment shall comprise individual pickets from a section of thefence fabric. The specimens shall be of sufficient length so asto be firmly gripped in the testing machine after straightening.Polymer coating may be

36、 removed from the sample by chemicalor mechanical means before testing. The actual gauge length(distance between jaws) of the specimen shall be limited to theundeformed length of wire between the two adjacent bends.14. Weight of Zinc, Aluminum, or Zinc-5 % Aluminum-Mischmetal Alloy Coatings14.1 The

37、weight of zinc or aluminum coating shall conformto Table 4.14.2 The weight of coating shall be determined on anindividual piece of wire removed from the fabric. This speci-men may be any length of wire over 12 in. 305 mm and shallinclude both bends and straight sections, but shall not includeeither

38、twists or knuckles.14.3 The weight of zinc or zinc-5 % aluminum-mischmetalalloy coating shall be determined by the method contained inTest Method A 90/A 90M after stripping the polymer coatingas outlined in Section 15.14.4 The weight of aluminum coating shall be determinedby the method contained in

39、Test Method A 428, after strippingthe polymer coating as outlined in Section 15.15. Thickness of Polymer Coating15.1 The thickness of the polymer coating shall be inaccordance with Table 5.TABLE 2 Typical Diamond CountANOTE 1Other diamond counts are permitted (see Section 9 on Diamond Count).NOTE 2

40、For fabric heights over 144 in., see Section 9.NominalDiameterCore Wire, in.Size ofMesh, in.Height of Fence Fabric, in.36 42 48 60 72 84 96 108 120 1440.192 2 1012 1212 1312 1712 2012 2412 2712 3112 3412 41120.148 2 1012 1212 13 1712 2012 2412 2712 3112 3412 41120.148 114 23 29 35 41 46 52 56 700.12

41、0 2 1012 1212 1412 1712 2012 24120.120 218 912 1112 1312 1612 19120.120 134 1112 1312 1512 1912 2312 2712 3112 3512 3912 47120.120 114 23 29 35 41 46 52 56 700.120 20 23273345536167690.120580.120120.120380.105580.10512 see Fig. 10.105380.080580.080120.08038ASee Table X1.1 for metric equivalents.TABL

42、E 3 Breaking Strength of Core WireSpecified Diameter of Core Wire, in.mmMinimum Breaking Strengthlbf N0.192 4.88 2170 96500.148 4.76 1290 57400.120 3.05 850 37800.105 2.67 650 28900.080 2.03 380 1690TABLE 4 Weight of Zinc, Aluminum, or Zinc-5 % Aluminum-Mischmetal Alloy CoatingsSpecified Diameter of

43、Core Wire,in. mmMinimum Weight ofZinc or Zinc-5 % Aluminum-Mischmetal Alloy Coating,oz/ft2g/m2Minimum Weight ofAluminum Coating,oz/ft2g/m20.192 4.88 0.40 122 0.20 610.148 3.76 0.30 92 0.20 610.120 3.05 0.30 92 0.20 610.105 2.67 0.30 92 0.20 610.080 2.03 0.25 76 0.20 61F66807315.2 The thickness of po

44、lymer coating shall be determinedon an individual piece of wire removed from the fabric. Thisspecimen may be any length of wire over 12 in. 305 mm andshall include both bends and straight sections, but shall notinclude either twists or knuckles.15.3 For Class 1 and Class 2a material, mechanically st

45、ripthe polymer coating from the wire and measure the minimumand maximum thickness of the polymer coating with a suitablemicrometer.15.4 For Class 2b material, strip the polymer coating bychemical or mechanical means and determine the diameter ofthe bare wire. Scrape the coating from one side of the

46、wire andmeasure the reduced diameter with a micrometer. The thick-ness of coating at this point is the difference between themeasurement thus obtained and the measured diameter of thebare wire. In a similar manner, determine the thickness ofcoating at right angles to the first determination.15.5 Whe

47、n removing polymer coating by scraping, takecare not to remove any of the metallic surface.16. Properties of Polymer-Coated Wire16.1 The polymer-coated wire from which the fabric iswoven shall have a demonstrated ability to conform to thefollowing requirements:16.2 Adhesion Tests:16.2.1 Class 2a mus

48、t conform to the requirements of 16.2.2.Class 2b must conform to the requirements of 16.2.3.16.2.2 Three specimens from each lot shall be tested.Measure a distance of34 in. 19 mm from the end of thespecimen. With a regular hand grip wire stripper, exert maxi-mum hand pull parallel to the axis of the

49、 wire. Attempt toremove the measured portion of the vinyl sleeve from the corewire. The lot shall be acceptable if the polymer sleeve is notcapable of being removed from the core wire on all threesamples.16.2.3 Three specimens from each lot shall be tested. Maketwo cuts parallel to the axis of the wire through the coating,approximately116 in. 1.6 mm apart, at least12 in. 12.7 mmlong. Wi