IS 15328:2003

If you are a manufacturer, a question should always be on your mind while producing goods. What requirements, procedures and testing methodology, and quality control orders need to be followed to produce standard quality products? What is the procedure for BIS certification?

Make sure that your product must follow specified Indian standard for that product. Let's take a closer look at IS 15328:2003 for Unplasticized non-pressure Polyvinyl Chloride (PVC-U) pipes.

The Bureau of Indian Standards adopted this Indian Standard after the Civil Engineering Division Council approved the draft finalized by the Plastic Piping System Sectional Committee. The purpose of this standard is to provide guidance for the manufacture and selection of PVC-U pipes for the conveyance of domestic sewage, industrial waste, and surface water (other than potable water).

Unplasticized non-pressure Polyvinyl Chloride (PVC-U) pipes for use in underground drainage and sewerage systems are covered under IS 15328:2003. This standard specifies the requirement for plain ended or equipped with integral sockets for solvent-cement welding or joining with elastomeric sealing rings pipes made of unplasticized polyvinyl chloride (PVC-U) with nominal outside diameters ranging from 110 mm to and including 630 mm, intended for non-underground pressure gravity drain and sewer applications for transportation of domestic soil and waste discharge, surface water, and industrial effluent.

The material from which the pipe is made shall be primarily polyvinyl chloride. Only those additives are necessary to facilitate the manufacture of the compound, and the manufacture of sound and durable pipe with good surface finish, mechanical strength, and opacity under normal conditions may be added. The material must contain at least 0.3 percent retile grade titanium dioxide.

The product is tested to determine the Vicat softening temperature, resistance to external blows, ring stiffness, and leak tightness under positive and negative temperature conditions. This pipe will also be subjected to a type and acceptance test.


Each pipe shall be clearly and indelibly marked in the specified color in ink/paint or hot-embossed on a white base at intervals of not more than 3 m, but at least once per pipe.

The marking shall show the following:

  1. Identification of the source of manufacture,
  2. Outside diameter,
  3. Stiffness class, and
  4. Batch or Lot number

Each pipe may also be marked with the Standard Mark (ISI Mark). The manufacturer must obtain a BIS license from the Bureau of Indian Standards to use a standard mark (ISI Mark). The Bureau grants a license based on a successful assessment of a manufacturer's manufacturing infrastructure, production process, and quality control and testing capabilities during a visit to its manufacturing premises.

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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