IS 9523:2000 encompasses specifications for Ductile Iron Fittings utilized in Pressure Pipe systems, catering to water, gas, and sewage transportation with nominal diameters spanning from 80 to 2000 mm.

The size range mentioned above is segmented into the subsequent groups:

To encompass the entire range, it is necessary to draw and test one sample from each group of the same fitting.

This standard is applicable to fittings utilized for mechanical joints, push-on joints, and flanged joints, intended for jointing with different types of gaskets. However, it does not encompass the design of the socket or the gasket. Additionally, fittings crafted from spun pipes and plain-ended fittings may be employed when required.

This standard allows for the exploration and advancement of alternative joint types, provided that safety and interchangeability of overall dimensions are upheld.

Fittings outlined in this standard usually come equipped with external and internal coatings to combat corrosion. Designed for fluid temperatures between 0°C to 50°C, excluding freezing conditions.

The metal utilized in casting production must adhere to the relevant grade outlined in IS 1865, in alignment with the specifications of this standard.

The castings should be carefully stripped to prevent warping or shrinkage defects, ensuring structural integrity and absence of surface or other flaws. Compliance with the standard's specifications is imperative for the fittings.

TESTS

The subsequent test must be conducted for Ductile Iron fittings.

• Tensile test

• Hardness test

• Heat treatment

• Retests

• Hydrostatic test

MARKING

Marking procedures must adhere to IS 9523:2000 specifications. Each fitting must be clearly marked with the required information outlined in the standard. The standard mark, known as the ISI mark, is mandatory for every fitting, ensuring that the material meets all specified requirements. Manufacturers must obtain a BIS license from the Bureau of Indian Standards to utilize the ISI mark. This license is granted following a thorough evaluation of manufacturing infrastructure, quality control, testing capabilities, and manufacturing processes.

PROCESS FOR BIS ISI MARK CERTIFICATION