IS 1161: 2014

In this competitive scenario, it isn't easy to survive in the market without a standard quality and certified product. BIS license may also be required to sell products in the Indian market.

To get BIS certification and produce a standard quality product, the manufacturer must ensure that their product must follow the specified Indian standard.

Let’s take a closer look at IS 1161: 2014 for Steel Tubes for Structural Purposes.

IS 1161: 2014 covers Steel Tubes for Structural Purposes. This standard specifies the requirements for hot-finished welded (HFW), hot finished seamless (IFS), electric resistance welded (ERW), or high-frequency induction welded (HRIW) and plain carbon steel tubes for structural purposes.

Steel tubes covered by this standard must be designated by their nominal bore and classified as 'Light,' 'Medium,' or 'Heavy,' depending on the wall thickness. Depending on the yield stress of the material, they will be graded as Y St 2 10, Y St 240, and Y St 3 10. As a result, the designation of steel tubes must include the nominal bore of the tube, wall thickness classification, and material grade.

General requirements for the supply of steel tubes for structural purposes must conform to IS 1387. The tubes must be made of steel in accordance with the specifications. The standard sizes and weights of structural tubes shall be as specified in the standard. The tubes must be cleanly finished and relatively free of scale. They must be free of cracks, flaws on the surface, laminations, and other flaws. Steel tubes must be made from hot rolled steel strips in accordance with IS 10748. Stell tube must meet the requirements of the standard.


The following test shall be done in accordance with the method specified.

  • Flattening test
  • Cold bend test
  • Mechanical test
  • Length
  • Workmanship
  • Dimension and weight
  • Material (Chemical composition)


Marking shall be done in accordance with IS 1161:2014. Each tube must be suitably marked with the manufacturer's name or trade-mark, as well as the tube's class. The Standard Mark (ISI Mark) may also be applied to the tubes. The manufacturer must obtain a BIS license from the Bureau of Indian Standards to use a standard mark (ISI Mark). The BIS issues a license based on a successful evaluation of the manufacturing infrastructure, quality control, testing capabilities, and manufacturing process.

isi mark


For Detailed Information about the Procedure for BIS ISI Certification


If a product falls under the scope of the BIS Conformity Assessment Scheme, All the manufacturers, importers, and foreign entities must obtain BIS ISI Certification. The Bureau may cancel the License if the product fails to meet certification requirements.

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