This standard specifies the requirements for ductile iron fittings, such as bends, tees, and tapers, used in pressure pipelines for water and sewage. It covers material properties, dimensions, manufacturing tolerances, performance criteria, testing procedures, and requirements for coatings and linings.
Specifies requirements for ductile iron fittings suitable for use with ductile iron pressure pipes.
Quick Reference Values
Minimum Tensile Strength420 MPa
Minimum Elongation at Break10%
Minimum Hardness230 HBW
Minimum Bituminous Coating Thickness (External)70 microns (dry)
Minimum Zinc Coating Mass (if specified)200 g/m²
Hydrostatic Test Pressure FormulaHigher of (1.5 x PFA) or (PFA + 5 bar)
Practical Notes
Ensure the pressure class and joint type (e.g., push-on, flanged) of fittings match the connecting ductile iron pipes (as per IS 8329).
Carefully inspect the internal cement mortar lining and external bituminous coating upon delivery and during installation to prevent damage, which can lead to premature corrosion.
Verify that the rubber gaskets used for joints conform to IS 5382 and are correctly seated during assembly to ensure a leak-proof seal.