This standard outlines the technical criteria for hexagonal wire mesh intended for general applications in India, detailing specifications on materials, dimensions, manufacturing tolerances, surface treatment, marking, sampling, and quality assurance of galvanized mild steel wire netting with hexagonal openings. It serves as a critical reference for producers, suppliers, and engineers who design or utilize wire mesh in fencing, sieving, and various industrial sectors.
Overview
This standard outlines the technical criteria for hexagonal wire mesh intended for general applications in India, detailing specifications on materials, dimensions, manufacturing tolerances, surface treatment, marking, sampling, and quality assurance of galvanized mild steel wire netting with hexagonal openings. It serves as a critical reference for producers, suppliers, and engineers who design or utilize wire mesh in fencing, sieving, and various industrial sectors.
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Frequently Asked
As per IS 3150 (1982), the hexagonal wire netting specifies standard wire diameters and aperture sizes detailed in Table 2. Aperture size refers to the internal measurement of the hexagonal opening, while wire diameter denotes the thickness of the wire used. Common aperture sizes range from 6.35 mm to 25.4 mm or more, with wire thickness increasing proportionally to ensure adequate strength. The netting is produced in standard widths to suit various applications. For precise details, refer to Table 2 in IS 3150.
According to IS 3150 and IS 4826-1979, steel wire used in hexagonal netting may be coated with zinc in three categories: light, medium, and heavy coatings. The choice of coating thickness, measured in grams per square meter, must be mutually agreed upon by the purchaser and manufacturer. Only hot-dip galvanizing before weaving is permitted; galvanizing after weaving is disallowed. The coating provides corrosion protection tailored to the intended use, with typical zinc coating weights approximately 150 g/m² for light, 275 g/m² for medium, and 450 g/m² for heavy coatings.
The quality assessment of wire netting rolls under IS 3150 involves verifying the use of annealed mild steel wire complying with IS 280-1978, ensuring galvanization is applied prior to weaving, and checking dimensional and construction parameters. Sampling inspection is carried out following an Acceptance Quality Level (AQL) of 2.5%, using the sampling tables outlined in IS 2500 (Part I)-1973. The number of defective rolls detected in the sample determines whether the lot is accepted or rejected. Additionally, results are rounded according to IS 2-1960 to maintain consistency with specified tolerances.
Each roll of hexagonal wire mesh must be clearly labeled with the manufacturer's name or trademark, the roll's width and length, the aperture size (mesh opening dimension), and the wire diameter. This marking facilitates traceability and confirms compliance with IS 3150 specifications. Such information ensures users can verify that the product meets required standards for their application.
While galvanization per IS 4826-1979 remains the standard surface protection method, IS 3150 permits alternative coatings or treatments only if explicitly agreed upon by both the purchaser and manufacturer. This provision allows flexibility to conserve zinc resources or to use other corrosion-resistant finishes such as epoxy or polymer coatings. However, such alternatives require mutual consent and are not the default treatment.
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