1、Designation: A 810 01Standard Specification forZinc-Coated (Galvanized) Steel Pipe Winding Mesh1This standard is issued under the fixed designation A 810; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 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 various designs of welded wiremesh or twisted (woven) hexagonal wire mesh, zinc coatedbefore fabrication, t
3、o be used as reinforcement for the concreteapplied in the manufacture of negative buoyancy pipe neededfor laying pipe in marshes or in water. The mesh is also usedas reinforcement for concrete applied to pipe as a bendable ornonbendable mechanical protective coating when laying pipein a harsh enviro
4、nment.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 The text of this standard references notes and footnotesthat provide explanatory material. These notes and footnotes(excluding those in tables and figures) s
5、hall not be consideredas requirements of the standard.2. Referenced Documents2.1 ASTM Standards:A 90/A 90M Test Method for Weight (Mass) of Coating onIron and Steel Articles with Zinc or Zinc-Alloy Coatings2A 370 Test Methods and Definitions for Mechanical Testingof Steel Products3A 641/A 641M Speci
6、fication for Zinc-Coated (Galvanized)Carbon Steel Wire2A 902 Terminology Relating to Metallic Coated Steel Prod-ucts2B 6 Specification for Zinc43. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, see Terminology A 902.4. Classification4.1 The steel pipe winding mesh is
7、 classified by type, basedon method of manufacture, and by design number, related towidth, number of longitudinal wires, and wire sizes.4.2 Types of Fabric:4.2.1 Type TWFabric manufactured by twisting wires toform a mesh with a series of hexagonal openings, as shown inFig. 1. One of the edges of the
8、 fabric includes a straight selvagewire. Additional longitudinal reinforcing wires are includedwhen specified.4.2.2 Type WWFabric manufactured by welding a seriesof longitudinal wires to transverse wires to form a mesh withrectangular openings.4.2.2.1 Type WW-CType WW fabric having uniformspacing of
9、 longitudinal wires, with the longitudinal wirescrimped as indicated in Fig. 2.4.2.2.2 Type WW-NType WW fabric having nonuniformspacing of longitudinal wires, by having the space between theedge wire and adjacent longitudinal wire double the spacing ofthe intermediate longitudinal wires. All longitu
10、dinal wires arecrimped as indicated in Fig. 3.4.2.2.3 Type WW-SType WW fabric having straight lon-gitudinal wires (without crimping), with uniform spacing asindicated in Fig. 4.4.3 Design NumbersThe design number is in the form ofA 3 B 3 C 3 D.4.3.1 For Type TW fabric, whereA = nominal width of wire
11、 mesh fabric, in inches (milli-metres),B = number of straight reinforcing wires, not including thestraight selvage wire,C = nominal diameter of wire in hexagonal mesh andstraight selvage wire, in inches (millimetres), andD = nominal diameter of straight reinforcing wires, notincluding straight selva
12、ge wire, in inches (millimetres).(Example: 7.5 3 1 3 0.054 3 0.048.)4.3.2 For Type WW fabric, whereA = nominal overall width of wire mesh fabric, in inches(millimetres),B = number of longitudinal wires,C = nominal diameter of longitudinal wires, in inches(millimetres), andD = nominal diameter of tra
13、nsverse wires, in inches (mil-limetres). (Example: 7.5 3 8 3 0.063 3 0.063.)5. Ordering Information5.1 Orders for zinc-coated steel pipe winding mesh underthis specification shall include the following information, as1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coat
14、ed Iron and Steel Products and is the direct responsibility ofSubcommittee A05.12 on Wire Specifications.Current edition approved April 10, 2001. Published June 2001. Originallypublished as A 810 83. Last previous edition A 810 00.2Annual Book of ASTM Standards, Vol 01.06.3Annual Book of ASTM Standa
15、rds, Vol 01.03.4Annual Book of ASTM Standards, Vol 02.04.1Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.necessary to adequately describe the desired product:5.1.1 Name of material (steel pipe winding mesh),5.1.2 ASTM designation and year of issue,5.1.3 Type o
16、f fabric (see 4.2),5.1.4 Design number (see 4.3 and Tables 1 and 2),5.1.4.1 Mesh dimensions for welded mesh (see 9.3 andTable 3),5.1.5 Zinc coating class (see 8.1),5.1.6 Quantity (number of rolls),5.1.7 Width of fabric and length of rolls, and5.1.8 Packaging (see Section 14).6. Materials6.1 The stee
17、l from which the wire is produced shall be madeby any commercially accepted steelmaking process.6.1.1 The base metal shall be a steel having composition topermit drawing to a finished size and also to ensure freedomfrom zinc flaking during weaving or welding into mesh.6.1.2 Wire for Welded MeshBefor
18、e welding the galva-nized wire shall have a minimum tensile strength of 70 000 psi(483 MPa),6.1.3 Wire for Hexagonal Woven MeshBefore weavingthe galvanized wire shall have a maximum tensile strength of75 000 psi (515 MPa),6.2 Slab zinc used for the coating shall be any grade of zincconforming to Spe
19、cification B 6.7. Manufacture7.1 Hexagonal Woven MeshThis fabric is manufacturedby twisting wires to form a series of openings, hexagonal inshape, as specified in Table 1 and Fig. 1. One of the edges ofthe fabric shall be constructed to include a selvage wire. Inaddition to those specified in Table
20、1 and Fig. 1, other designs(width and other reinforcing wire configurations) are subject toagreement between the purchaser and manufacturer.7.2 Welded MeshThis fabric is manufactured by weldinga series of parallel longitudinal wires to transverse wires toform rectangular openings. The longitudinal w
21、ires shall becrimped or not crimped as indicated for the type specified.Crimping shall be as indicated in Fig. 2. In addition to thosespecified in Table 2, and Figs. 2-4, other designs (width andlongitudinal wire configurations) are subject to agreementbetween the purchaser and manufacturer.8. Coati
22、ng Requirements8.1 The zinc coating shall be Class 1 coating, or shall be“regular coating”, whichever is specified in the purchase order.8.1.1 Class 1 zinc coating shall be as specified in Specifi-cation A 641/A 641M.8.1.2 Zinc-coated wire produced as “regular coating” shallhave the full surface cov
23、ered with zinc, but there is no specifiedminimum weight of coating.8.2 Slight burning of the zinc coating at welded intersec-tions of welded mesh shall not be cause for rejection.FIG. 1 Type TWTwisted Hexagonal Mesh (Design Number 7.5 30 3 0.054 3 0)FIG. 2 Type WW-CCrimped Welded Mesh with UniformLo
24、ngitudinal Wire SpacingFIG. 3 Type WW-NCrimped Welded Mesh with Non-UniformLongitudinal Wire SpacingFIG. 4 Type WW-SWelded Mesh with Straight LongitudinalWiresA 81029. Dimensions and Permissible Variations9.1 Width of FabricHexagonal mesh fabric is usuallyavailable in 712-in. (190-mm) width. Welded
25、mesh fabric,crimped, is usually available in 7-in. (178-mm) width having amaximum width of 712 in. (190 mm) including crimp. Non-crimped welded mesh fabric is usually available in 8-in.(203-mm) width. Other widths of woven and welded fabricsare available. Nominal width of fabric shall be as agreed u
26、ponbetween the purchaser and manufacturer.9.2 Length of RollNominal length of rolls shall be asagreed upon between the purchaser and manufacturer.9.3 Standard openings in Type TW mesh, between adjacentwires parallel to the selvage wire, is shown in Fig. 1. Standardspacing for longitudinal wires in T
27、ype WW-C, Type WW-N,and Type WW-S mesh is shown in Figs. 2-4, respectively.Standard spacing for transverse wires in Type WW fabrics isshown in Table 3. All measurements are center to center ofwires. Spacing other than indicated are subject to agreementbetween the purchaser and manufacturer.9.4 Toler
28、ances:9.4.1 Width:9.4.1.1 Hexagonal MeshActual width between outerwires shall not be more than12in. (13 mm) under the specifiedwidth.9.4.1.2 Welded MeshActual width between outer wiresshall not be more than1364in. (5 mm) under the specified width.9.4.2 LengthActual length shall be ordered length 0,+
29、3 %.9.4.3 Mesh Size:9.4.3.1 For hexagonal mesh, the tolerance shall be 618 in.(63.2 mm).9.4.3.2 Welded mesh size tolerances shall be in accordancewith Table 3.9.4.4 Wire Size:9.4.4.1 Permissible variation of the nominal diameter ofwire shall be as follows:TABLE 1 Standard Sizes and Constructions for
30、 Type TW Woven Hexagonal MeshDesign NumbersPrevious DesignNumbersNominal Width,in. (mm)Nominal Diameter ofZinc-Coated Wire,in. (mm)Nominal Cross SectionalArea Per Nominal Width,in.2(mm2)ANominal Cross SectionalArea Per Foot (Meter) ofWidth,in.2(mm2)AB7.5 3 0 3 0.054 3 0 10712 3 1123 17 712 (190) 0.0
31、54 (1.37) 0.0252 (16.26) 0.0430 (91.02)7.5 3 1 3 0.054 3 0.048C20712 3 112 3 1718C712 (190) 0.054 (1.37)/0.048 (1.22) 0.0270 (17.42) 0.0489 (103.51)7.5 3 2 3 0.054 3 0.048D30712 3 112 3 1718D712 (190) 0.054 (1.37)/0.048 (1.22) 0.0287 (18.52) 0.0519 (109.86)7.5 3 4 3 0.054 3 0.048E50712 3 112 3 1718E
32、712 (190) 0.054 (1.37)/0.048 (1.22) 0.0323 (20.84) 0.0580 (122.77)14.25 3 4 3 0.054 3 0.048F51414 3 112 3 1718F1414(362) 0.054 (1.37)/0.048 (1.22) 0.0529 (34.13) 0.0475 (100.55)ABased on nominal diameter.BIncludes minimum12-in. (12.70-mm) lap of mesh as applied.CPlus 0.048 in. (1.22 mm) line wire pl
33、aced 412in. (114.30 mm) from selvage.DPlus 0.048 in. (1.22 mm) line wires placed 3 in. (76.20 mm) and 6 in. (152.40 mm) from selvage.EPlus 0.048 in. (1.22 mm) line wires placed 112 in. (38.10 mm), 3 in. (76.20 mm), 412 in. (114.30 mm), and 6 in. (152.40 mm) from selvage.FPlus 0.048 in. (1.22 mm) lin
34、e wires placed 3 in. (76.20 mm), 6 in. (152.40 mm), 9 in. (228.60 mm), and 12 in. (304.80 mm) from selvage.TABLE 2 Standard Sizes and Constructions For Type WW Welded Wire MeshDesign NumbersPrevious DesignNumbersNominal Diameter of Zinc-CoatedWire, in. (mm)Nominal Cross Sectional Area PerNominal Wid
35、th, in.2(mm2)ANominal Cross Sectional Area perFoot (Metre) of Width, in.2(mm2)ABType WW-CUniform SpacingCrimped7.5 3 8 3 0.059 3 0.059 1.50 3 1.50 0.059 (1.50)/0.059 (1.50) 0.0219 (14.13) 0.0373 (78.96)7.5 3 8 3 0.063 3 0.063 1.60 3 1.60 0.063 (1.60)/0.063 (1.60) 0.0249 (16.06) 0.0426 (90.17)7.5 3 8
36、 3 0.079 3 0.063 2.00 3 1.60 0.079 (2.00)/0.063 (1.60) 0.0392 (25.29) 0.0669 (141.61)7.5 3 8 3 0.079 3 0.079 2.00 3 2.00 0.079 (2.00)/0.079 (2.00) 0.0392 (25.29) 0.0669 (141.61)7.5 3 8 3 0.098 3 0.079 2.50 3 2.00 0.098 (2.50)/0.079 (2.00) 0.0603 (38.90) 0.1030 (218.03)7.5 3 8 3 0.118 3 0.079 3.00 3
37、2.00 0.118 (3.00)/0.079 (2.00) 0.0875 (56.45) 0.1493 (316.03)Type WW-NNon-uniform SpacingCrimped7.5 3 6 3 0.063 3 0.063 . . . 0.063 (1.60)/0.063 (1.60) 0.0187 (12.06) 0.0374 (79.16)7.5 3 6 3 0.079 3 0.063 . . . 0.079 (2.00)/0.063 (1.60) 0.0294 (18.97) 0.0588 (124.46)7.5 3 6 3 0.098 3 0.079 . . . 0.0
38、98 (2.50)/0.079 (2.00) 0.0453 (29.23) 0.0905 (191.56)7.5 3 6 3 0.118 3 0.079 . . . 0.118 (3.00)/0.079 (2.00) 0.0656 (42.32) 0.1312 (277.71)Type WW-SUniform SpacingNot Crimped8 3 9 3 0.079 3 0.079 14 3 14 0.079 (2.00)/0.079 (2.00) 0.0446 (28.80) 0.0685 (145.06)ABased on nominal diameter.BIncludes min
39、imum12-in. (12.70-mm) lap of mesh for Types WW-C and WW-S, and 1-in. (25.4-mm) lap of mesh for Type WW-N, as applied.TABLE 3 Welded Mesh Sizes and TolerancesNOTE 1Mesh sizes are measured from center to center and alwaysindicated by two figures, L 3 S, where L = the distance between thelongitudinal w
40、ires, in. (mm).NOTE 2Crimp depth12 in. (12.7 mm), tolerance 618 in. (3.2 mm).Nominal Mesh Size, L 3 S, in. (mm) Tolerance, L 3 S, in. (mm)Crimped mesh, where L = the distance between the transverse wires aftercrimping; with L = 1 in. (25.4 mm) for Type WW-C mesh, and 1 in. (25.4 mm) or 2in. (50.8 mm
41、) for Type WW-N mesh (as indicated in Fig. 3).L 3 258 (67)L 3 358 (92)6564 (2) 361364(5)6564(2) 361364 (5)Noncrimped Style, where S = the distance between the transverse wires, in.(mm)1 (25.4) 3 212 (63) 6564 (2) 361364 (5)A 81030.035 in. (0.89 mm) to under 0.076 in. (1.93 mm) 6 0.002 in. (0.05 mm)0
42、.076 in. (1.93 mm) and over 6 0.003 in. (0.08 mm)10. Sampling and Testing10.1 For test purposes, one sample shall be taken from oneroll selected at random from each 200 rolls or fraction thereof.10.1.1 Development of cross-sectional area data shall comefrom these samples.10.1.2 Because of the distor
43、tion inherent in the manufactur-ing of the mesh, it is normal to test for coating weight andtensile compliance on samples of wire before fabrication. Thenumber of test specimens will vary with the quality controlprocedures and facilities of each manufacturer.10.2 Determine the weight of zinc coating
44、s for wire speci-fied to have a Class 1 coating, by the stripping test inaccordance with Test Method A 90/A 90M. Inspect wire speci-fied to have a “regular coating” to verify that the wire iscompletely coated (except for slight burning at welded inter-sections for wire inspected after fabrication).1
45、0.2.1 For wire tested before fabrication, the minimum testspecimen length shall be 24 in. (600 mm).10.2.2 For wire tested after fabrication, cut short lengths ofwire from between twists or welds, such that the total lengthequals at least 24 in. (600 mm).10.3 Tensile testing shall be as described in
46、Test Methodsand Definitions A 370.11. Retests and Rejection11.1 If one or more of the samples fail to show compliancewith any of the requirements of this specification, the lot shallbe subjected to retest.11.2 Retesting of the lot shall be on the basis of a samplingfrequency of one sample for each 5
47、0 rolls. If any sample failsto show compliance with the requirements of this specification,the entire lot shall be rejected.12. Inspection12.1 The manufacturer shall afford the inspector represent-ing the purchaser all reasonable facilities to satisfy the inspec-tor that the material is being furnis
48、hed in accordance with thisspecification. All tests and inspections shall be made at theplace of manufacture before shipment, unless otherwise speci-fied, and be conducted so as not to interfere unnecessarily withthe operation of the works.13. Certification13.1 When specified in the purchase order o
49、r contract, thepurchaser shall be furnished certification that the samplesrepresenting each lot have been either tested or inspected asdirected in this specification and that the requirements havebeen met. When specified in the purchase order or contract, areport of the test results shall be furnished.14. Packaging, Marking, and Loading14.1 Packaging will be based on negotiations between thepurchaser and the manufacturer. Banding or strapping with orwithout pallets represents a common form of package.14.2 A tag shall be s
