This standard specifies the general requirements for material, manufacture, glazing, dimensions, and testing of vitreous china sanitary appliances. It is primarily used by plumbing engineers, architects, and quality inspectors to ensure sanitary fittings are durable, hygienic, and resistant to crazing and water absorption.
Lays down general requirements, dimensions, and testing methods for vitreous china sanitary appliances.
Quick Reference Values
max water absorption0.5% by weight
crazing test pressure0.34 MPa (3.5 kg/cm²)
crazing test duration10 hours
min modulus of rupture60 MPa
minimum appliance thickness6 mm
tolerance on dimensions above 100mm± 4 percent
tolerance on dimensions up to 100mm± 5 mm
Practical Notes
Strictly enforce the 0.5% water absorption limit; higher absorption in ceramics leads to foul odors and hygiene issues over time.
Be aware of the ±4% dimensional tolerance when designing tight bathroom layouts or specifying custom countertops for drop-in wash basins.
Visual inspections for defects like crazing, pinholes, and blistering should be conducted under standard lighting conditions specified in the code.