Similar International Standards
ASTM A392-21ASTM International, USA
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Standard Specification for Zinc-Coated Steel Chain-Link Fence Fabric
Specifies requirements for zinc-coated (galvanized) steel chain-link fence fabric.
EN 10223-6:2013European Committee for Standardization (CEN), Europe
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Steel wire and wire products for fencing and netting - Part 6: Steel wire chain link fencing
Specifies requirements for steel wire chain link fencing fabric, selvedges, and coatings.
AS 1725.1:2010Standards Australia, Australia
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Chain-link fabric security fences and gates - Part 1: Security chain-link fabric
Specifies requirements for the materials, manufacture, and properties of chain-link fabric.
Key Differences
≠IS 2721 specifies zinc coating mass based on wire diameter (e.g., 275 g/m² for 4mm wire), while ASTM A392 uses two distinct classes (Class 1 at 366 g/m² and Class 2 at 610 g/m²) that apply regardless of wire diameter, representing heavier standard coating options.
≠The Indian standard specifies the tensile strength of the steel wire before it is woven (350-500 MPa). In contrast, ASTM A392 specifies the breaking strength of the finished fabric sample, which is a post-manufacturing test of the woven product's integrity.
≠IS 2721:1986 is an older standard, last reaffirmed in 2021 without technical changes. International counterparts like ASTM A392 and EN 10223-6 are more frequently updated to reflect modern manufacturing practices, coating technologies, and testing methods.
≠IS 2721 uses a single classification system for galvanized wire. EN 10223-6 references EN 10244-2, which provides multiple classes of zinc and zinc-alloy coatings (e.g., Class A, B, C), offering a wider range of corrosion protection levels.
Key Similarities
≈All standards cover the same core product: a fence fabric made from helically wound and interwoven zinc-coated steel wires, forming a characteristic diamond pattern.
≈Both IS 2721 and its international equivalents like ASTM A392 specify options for the fabric selvedge (edge finish), including 'knuckled' (bent over and flattened) and 'twisted' (barbed) ends.
≈The fundamental material specified across the standards is carbon steel wire that is zinc-coated for corrosion resistance, establishing a common basis for material composition.
≈All standards define key dimensional parameters for the fabric, such as the size of the mesh (diamond opening), the diameter of the wire, and the height of the fabric roll, along with permissible tolerances.