1、Designation: A 899 91 (Reapproved 2002)Standard Specification forSteel Wire, Epoxy-Coated1This standard is issued under the fixed designation A 899; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe
2、r 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 steel wire in the size range of0.120 to 0.500 in. (3.05 to 12.7 mm) with three classes ofprotective epoxy coating
3、, in coils, for general use. Class Acoating is intended for use for moderate corrosion protection,Class B coating for more severe protection, and Class C forsevere corrosion and abrasion protection.NOTE 1The coating applicator is identified throughout this specifica-tion as the manufacturer.1.2 The
4、values stated in inch-pound units are to be regardedas the standard. The SI units given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:A 510 Specification for General Requirements for WireRods and Coarse Round Wire, Carbon Steel2A 775/A775M Specification for Epoxy-C
5、oated ReinforcingSteel Bars3A 853 Specification for Steel Wire, Carbon, for GeneralUse2G 12 Test Method for Nondestructive Measurement of FilmThickness of Pipeline Coatings on Steel43. Ordering Information3.1 The purchaser shall specify the following:3.1.1 Wire size (the nominal diameter of the coat
6、ed wire),3.1.2 Quantity,3.1.3 Class of coating, and3.1.4 Method of packaging, such as, coils, coils on steelreels, etc.3.2 The purchaser may specify the following if desired:3.2.1 Requirements for certification (see 14.1),3.2.2 Requirements for patching material (see 4.3),3.2.3 Specific requirements
7、 for test frequency (see 8.1), and3.2.4 Requirements for outside inspection of manufacturingplant.NOTE 2A typical ordering description for wire is as follows: 40 000lb of epoxy coated wire, ASTM A 853, 0.148 in. diameter, Grade 1018with a Class A epoxy coating in 1000 lb coils on steel reels to ASTM
8、A 899.4. Materials and Manufacture4.1 Steel wire to be coated shall meet the requirements ofthe purchaser or the requirements of an applicable general wirespecification such as Specification A 510 and SpecificationA 853, and shall be free of surface contaminants such as oil,grease, or paint when rec
9、eived at the manufacturers plant andprior to cleaning and coating.4.2 The coating material shall meet the requirements listedin Annex A1 of Specification A 775/A 775M.4.2.1 If specified in the order, a written certification shall befurnished to the purchaser that properly identifies the numberof eac
10、h batch of coating material used in the order, material,quantity represented, date of manufacture, name and address ofmanufacturer, and a statement that the supplied coating mate-rial meets the requirements of Annex A1 of SpecificationA 775/A 775M.4.3 If specified in the order, patching material, co
11、mpatiblewith the coating material and meeting the requirements ofAnnex A1 of Specification A 775/A 775M shall be supplied tothe purchaser.5. Surface Preparation5.1 The surface of the steel wire to be coated shall becleaned by abrasive blast cleaning or chemical cleaning prior tocoating to ensure pro
12、per adherence of the epoxy to the steelsurface.5.2 Prior to abrasive blast cleaning, the surface of the wireto be coated may be cleaned in an aqueous solution to removeresidual wire drawing lubricants.6. Application of Coating6.1 The coating shall be applied to the cleaned surface assoon as possible
13、 after cleaning, and before oxidation of thesurface discernible to the unaided eye occurs.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.03 on Steel Rod and Wire.Current edition appr
14、oved Dec. 15, 1991. Published February 1992. Originallypublished as A 899 90. Last previous edition A 899 90.2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 01.04.4Annual Book of ASTM Standards, Vol 06.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700
15、, West Conshohocken, PA 19428-2959, United States.6.2 The coating shall be applied and properly cured inaccordance with the recommendations of the manufacturer ofthe coating material to satisfy the product requirements.7. Requirements for Coated Wire7.1 Thickness of Coating:7.1.1 Class AThe film thi
16、ckness of the coating aftercuring shall be 5 mils minimum (0.13 mm).7.1.2 Class BThe film thickness of the coating aftercuring shall be 10 mils minimum (0.25 mm).7.1.3 Class CThe film thickness of the coating aftercuring shall be 20 mils minimum (0.51 mm).7.1.4 The thickness of the coating film shal
17、l be measured inaccordance with Test Method G 12, or other thickness-measuring methods acceptable to the purchaser. For accep-tance, 90 % of these measurements shall be within the specifiedlimits. The five recommendations contained in A 1.3.4.1 inAnnex A 1 of Specification A 775/A 775M apply when th
18、ecoating thickness is measured as follows:7.1.4.1 In accordance with Test Method G 12, and7.1.4.2 With commercially available pull-off gages andfixed probe gages having a magnetic field of vision notexceeding 0.015 in. (0.38 mm) of steel depth.7.2 Continuity of Coating:7.2.1 After curing, the coatin
19、g shall be free of holes, voids,cracks, and damaged areas discernible to the unaided eye.7.2.2 There shall not be more than an average of oneholiday, (pinholes not discernible to the unaided eye) per linearfoot (3 holidays per linear metre) of wire.7.2.3 Holiday checks to determine acceptability of
20、the wireshall be made at the manufacturers plant with a 67.5 V d-choliday detector.7.3 Adherence of Coating:7.3.1 The epoxy coated wire shall be capable of beingwrapped in a closed helix at a rate not exceeding 15 turns perminute around a cylindrical steel mandrel having a diameter oftwo times the w
21、ire diameter being tested.7.3.2 No cracking or disbonding of the coating from thewrap test of 7.3.1 shall be visible to the unaided eye. Except asspecified in 9.1, evidence of cracking or disbonding of thecoating shall be considered cause for rejection of the coatedwire represented by the wrap test
22、sample.7.4 Mechanical TestsAll specified mechanical tests shallbe made on the coated wire with the tensile strength basedupon the diameter of the uncoated steel core wire. When tensiletesting, portions of the coating may be removed for ease ofgripping specimen in the tensile testing machine.7.5 Size
23、 Tolerance:7.5.1 The coated wire shall have a size tolerance of plus orminus 0.004 in. (0.10 mm) maximum from the orderednominal diameter.7.5.2 The uncoated wire intended for epoxy coating shall beproduced to a size tolerance that will allow the epoxy coatedwire to meet the tolerances of 7.5.1. Howe
24、ver in no case willthe size tolerance of the uncoated wire be required to be morerestrictive than one-half the values of permissible variation indiameter of Table 3of Specification A 510.7.6 Place of TestingTests for coating of steel wire shall bedone at the manufacturers plant prior to shipment.7.7
25、 Time of TestingAll requirements for coated wire shallbe met at the manufacturers plant prior to shipment.8. Number of Tests8.1 The purchaser may specify the sampling and test sched-ule for the number and frequency of tests for thickness ofcoating, adhesion of coating, and continuity of coating.8.2
26、If the number and frequency of tests are not specified bythe purchaser:8.2.1 Tests for thickness of coating and continuity of coatingshall be made on each size of wire coated during eachproduction hour.8.2.2 Bend tests for adhesion of coating shall be conductedon at least one wire of each size from
27、each production shift.9. Retests9.1 If the specimen for coating thickness or adhesion ofcoating fails to meet the specified requirements, two retests onrandom samples shall be conducted for each failed test. If theresults of both retests meet the specified requirements, thecoated material represente
28、d by the samples shall be accepted.10. Handling and Identification10.1 All systems for handling coated wire shall have paddedcontact areas. Suitable banding shall be used to preventdamage to the coating.10.2 The identification of all wire shall be maintainedthroughout the coating process to the poin
29、t of shipment.11. Inspection11.1 The inspector representing the purchaser shall havefree entry, at all times while work on the contract of thepurchaser is being performed, to all parts of the manufacturersworks that concern the manufacturer of the material ordered.The manufacturer shall afford the i
30、nspector all reasonablefacilities to satisfy that the material is being furnished inaccordance with this specification. All tests and inspectionsshall be made at the place of manufacture prior to shipment,unless otherwise specified, and shall be so conducted as not tointerfere unnecessarily with the
31、 operation of the works.12. Permissible Coating Damage Due to Handling andProcessing12.1 All damaged areas of each wire shall be repaired withpatching material.12.2 The maximum amount of damage shall not exceed 1 %of the surface area per linear foot (300 mm) of each wire.12.3 Patching shall be done
32、in accordance with the patchingmaterial manufacturers recommendation.13. Rejection and Rehearing13.1 Coated steel wire represented by test samples that donot meet the requirements of this specification shall be re-jected. At the manufacturers option, such wire shall bereplaced or, alternatively, may
33、 be stripped of coating, re-cleaned, recoated, and resubmitted for acceptance testing inaccordance with the requirements of this specification.A 899 91 (2002)214. Certification14.1 Upon request of the purchaser, the manufacturer shallfurnish, at the time of shipment, written certification that theco
34、ated steel wire meets the requirements of this specificationand a copy of the manufacturers quality control tests.14.2 The certification shall include the specification num-ber, year date of issue, and revision letter, if any.15. Keywords15.1 epoxy coated; wireASTM International takes no position re
35、specting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This
36、 standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Inter
37、national Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown b
38、elow.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 899 91 (2002)3
