ASTM A899-91(R2021) pdf free download

ASTM A899-91(R2021) pdf free download.Standard Specification for Steel Wire, Epoxy-Coated
1. Scope
1.1 This specification covers steel wire in the size range of 0.120 to 0.500 in. (3.05 to 12.7 mm) with three classes of protective epoxy coating, in coils, for general use. Class A coating is intended for use for moderate corrosion protection, Class B coating for more severe protection, and Class C for severe corrosion and abrasion protection. N OTE 1—The coating applicator is identified throughout this specifica- tion as the manufacturer. 1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Materials and Manufacture
4.1 Steel wire to be coated shall meet the requirements of the purchaser or the requirements ofan applicable general wire specification such as Specification A510/A510M and Specifi- cation A853, and shall be free of surface contaminants such as oil, grease, or paint when received at the manufacturer’s plant and prior to cleaning and coating. 4.2 The coating material shall meet the requirements listed in Annex A1 of Specification A775/A775M. 4.2.1 If specified in the order, a written certification shall be furnished to the purchaser that properly identifies the number of each batch of coating material used in the order, material, quantity represented, date ofmanufacture, name and address of manufacturer, and a statement that the supplied coating mate- rial meets the requirements of Annex A1 of Specification A775/A775M. 4.3 If specified in the order, patching material, compatible with the coating material and meeting the requirements of Annex A1 of Specification A775/A775M shall be supplied to the purchaser.
7. Requirements for Coated Wire
7.1 Thickness ofCoating: 7.1.1 Class A—The film thickness ofthe coating after curing shall be 5 mils minimum (0.13 mm). 7.1.2 Class B—The film thickness of the coating after curing shall be 10 mils minimum (0.25 mm). 7.1.3 Class C—The film thickness of the coating after curing shall be 20 mils minimum (0.51 mm). 7.1.4 The thickness of the coating film shall be measured in accordance with Test Method G12, or other thickness- measuring methods acceptable to the purchaser. For acceptance, 90 % of these measurements shall be within the specified limits. The five recommendations contained in A1.3.4.1 in Annex A1 of Specification A775/A775M apply when the coating thickness is measured as follows: 7.1.4.1 In accordance with Test Method G12, and 7.1.4.2 With commercially available pull-off gauges and fixed probe gauges having a magnetic field of vision not exceeding 0.015 in. (0.38 mm) of steel depth. 7.2 Continuity ofCoating: 7.2.1 After curing, the coating 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 one holiday, (pinholes not discernible to the unaided eye) per linear foot (3 holidays per linear metre) of wire. 7.2.3 Holiday checks to determine acceptability of the wire shall be made at the manufacturer’s plant with a 67.5 V d-c holiday detector. 7.3 Adherence ofCoating: 7.3.1 The epoxy coated wire shall be capable of being wrapped in a closed helix at a rate not exceeding 15 turns per minute around a cylindrical steel mandrel having a diameter of two times the wire diameter being tested. 7.3.2 No cracking or disbonding of the coating from the wrap test of 7.3.1 shall be visible to the unaided eye. Except as specified in 9.1, evidence of cracking or disbonding of the coating shall be considered cause for rejection of the coated wire represented by the wrap test sample.