Galvanized steel sheets ( plain and corrugated) IS 277:2003

Galvanized steel sheets, available in both plain and corrugated forms, are widely used in construction and industrial applications due to their excellent corrosion resistance, durability, and versatility. The galvanization process involves coating the steel sheets with a protective layer of zinc, which prevents rust and extends the material's lifespan. Plain galvanized sheets are often used for roofing, wall panels, ductwork, and automotive parts, while corrugated galvanized sheets are commonly utilized in roofing, siding, and fencing for residential, commercial, and agricultural buildings. Their ability to withstand harsh weather conditions and their ease of installation make galvanized steel sheets a popular choice for a variety of structural and decorative purposes.

Importance of BIS Certification

BIS certification is necessary for galvanized steel sheets, both plain and corrugated, to ensure they meet the stringent quality and safety standards set by the Bureau of Indian Standards. This certification guarantees that the sheets possess the required thickness, coating weight, tensile strength, and corrosion resistance essential for their intended applications. By adhering to BIS standards, manufacturers can ensure that their galvanized steel sheets are reliable, durable, and capable of withstanding various environmental conditions. Compliance with BIS certification fosters consumer trust, ensures regulatory alignment, and supports the construction and industrial sectors by providing high-quality materials that contribute to the safety and longevity of structures and products.

Indian Standard IS 277:2003

As per the latest Quality Control Order (QCO) issued by the Ministry of Steel, Government of India on 5th February 2024, Galvanized steel sheets (plain and corrugated) must conform to the Indian Standard IS 277:2003. This standard specifies the requirements for continuously hot-dip zinc-coated low carbon steel sheets for roofing, walling, and structural purposes. Adherence to IS 277:2003 ensures that these galvanized steel sheets meet essential quality criteria, including coating thickness, adhesion, and corrosion resistance, thereby ensuring their suitability for use in diverse applications such as construction, automotive, and manufacturing industries. Compliance with this standard is crucial for manufacturers to ensure product consistency, reliability, and regulatory compliance, fostering consumer trust in the quality and durability of galvanized steel sheets.

Key highlights

Product Name	Galvanized steel sheets ( plain and corrugated)
Applicable Indian Standard	IS 277:2003
Applicable Certification Scheme	Product Certification Scheme (ISI Mark Scheme) Scheme 1 - Schedule 2
Compliance Requirement	Mandatory
QCO Link	Galvanized steel sheets ( plain and corrugated) IS 277:2003
Scope as per Standard	1.1 This standard covers the requirements of plain galvanized steel sheets and strips (coils) and corrugated galvanized sheets. 1.2 Galvanized steel sheets covered by this standard are intended to be used for purposes such as paneling, roofing, applications requiring lock forming, etc. 1.3 Requirements of gal annealed and electrogalvanized steels are not covered in this standard. 1.4 The requirements of zinc and zinc alloy coated steel sheets for automotive and engineering applications are being covered in a separate standard which is under development.

Tests

The following are the major tests for Galvanized Steel Strips and Sheets (Plain & Corrugated).

Product Analysis
Zinc Ingots
Mechanical properties a) Yield Stress b) Tensile Strength c) Elongation (If Required by the purchaser)
Zinc Coating a) Mass of Coating b) Coating Finish Type c) Surface treatment
Mechanical Testing a) Bend test
Coating surface finish classes and designation
Freedom from defects
Dimensions &Tolerances of plain sheets/strips
Dimensions & Tolerances of Corrugated Sheets

Galvanized steel sheets ( plain and corrugated) IS 277:2003

NOTE:

For Detailed Information about the Procedure for BIS ISI Certification, Visit :

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Procedure for Domestic Manufacturer
Procedure for Foreign Manufacturer

Timeline for BIS Certification

The approximate timeline to obtain BIS certification for galvanized steel sheets (plain and corrugated) to use the ISI mark as per IS 277:2003 is as follows:

For Indian Manufacturers (Standard Timeframe – 30 days)
For Foreign Manufacturers (Standard Timeframe – 180 days)

Conclusion:

Galvanized steel sheets, whether plain or corrugated, are indispensable in construction and industrial sectors due to their robust corrosion resistance, durability, and versatility. These sheets are coated with zinc to shield against rust, making them ideal for roofing, wall panels, automotive parts, siding, and more. BIS certification is crucial for these sheets to ensure they meet stringent quality and safety standards set by the Bureau of Indian Standards.

Compliance with IS 277:2003 guarantees that galvanized sheets maintain specified coating thickness, adhesion, and corrosion resistance, ensuring reliability in diverse applications. This certification not only reinforces product quality and durability but also supports regulatory compliance and consumer confidence in the structural and functional integrity of galvanized steel sheets across various sectors.

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