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BIS ISI certification for hard drawn steel wire fabric (IS 1566:1982) is required for manufacturers and suppliers who want to mark and sell this product as conforming to Indian standards. The certification proves that the fabricated welded wire mesh meets mechanical and dimensional requirements set by the standard and it helps entry to public tenders and quality-focused markets
Hard drawn steel wire fabric consists of longitudinal and cross wires, electrically welded to form a mesh. It serves as concrete reinforcement in slabs and pavements. The mesh comes in square and oblong patterns and in different wire diameters and spacings. The IS 1566:1982 specifies wire diameter, mesh spacing, tensile properties and marking rules.
If you make, import or sell welded wire fabric for reinforcement, you must get BIS certification to claim ISI conformity in India. This applies to manufacturers, brand owners and authorised representatives. Buyers such as contractors and agencies often prefer ISI marked material for safety and contractual compliance.
Prepare clear and signed documents before you apply. Typical list includes:
Tests follow IS 1566 and related standards such as IS 432 (for hard drawn wire). Labs measure wire diameter, tensile strength, elongation, weld shear and mesh dimensions. Use NABL accredited labs that report results in the BIS accepted formats. Poor or non standard reports invite rejection.
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The BIS certification follows known steps. Keep files ready to avoid time loss.
BIS inspectors check your plant, tools and quality measures. Keep a quality manual. Show how you pick samples. Show test equipment calibration records and staff training notes. Labelling must match the licence scope. The inspector will check marking on bundles and coils. Be precise, and keep records tidy.
Fees cover application, inspection visits and surveillance. Testing costs go to the lab. Typical timeline runs from a few weeks to a few months. Delay often arises from incomplete tests, mismatched model details or weak quality systems. Plan extra time for first time applicants.
After grant you must follow licence rules. Use the ISI mark only on certified products. Keep test records and production logs. Allow surprise inspections and cooperate with BIS surveillance. Report any design or process change to BIS and retest if needed
If you import or rebrand mesh, appoint an Indian authorised representative. Ensure imported batches have traceable mill test certificates. For exports from India, ISI marking can boost reputation in some foreign markets.
IS 1566 appears on BIS product lists and on product manuals. Many public works call for ISI certified mesh. Check the BIS page and product manual for updates before you apply.
The product manual gives sampling rules and test frequency. Inspectors take samples from lots. Tests cover tensile, elongation and weld shear. Acceptance matches the standard limits. Keep heat numbers and test certificates with each batch to avoid disputes.
Inspectors often find wrong mesh sizes, out-of-tolerance wire diameters, missing heat numbers or weak welds. Uncalibrated instruments also cause notes. Fix these with clear QC steps.
Use batch testing and statistical samples to cut lab fees. Ask suppliers for mill test certificates. Keep a reliable NABL lab on retainer for fast tests. Plan procurement lead times to cover tests and inspection.
BIS ISI certification of IS 1566 products is done by tests, paper work and factory examination. Agile Regulatory helps the manufacturers in the entire process. They assist in document preparation, arranging of NABL tests, preparing the factory to be inspected and following up with BIS. Professional assistance minimizes mistakes and licensing would take less time, and concentrate on quality mesh.
Nishi Chawla
04 Nov, 2025
Nishi Chawla
04 Nov, 2025
Nishi Chawla
03 Nov, 2025
Nishi Chawla
03 Nov, 2025
Nishi Chawla
31 Oct, 2025
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