This multi-part standard specifies the methods of test for thermoplastic pipes and fittings. It provides standardized procedures for determining physical and mechanical properties such as dimensions, opacity, reversion, impact strength, and resistance to internal pressure, ensuring consistent quality control for manufacturing.
Thermoplastics Pipes and Fittings - Methods of Test
Quick Reference Values
Reversion Test Temperature (uPVC)150 ± 2 °C
Maximum Longitudinal Reversion5 %
Impact Test Temperature0 ± 1 °C
Type Test Hydrostatic Pressure Duration1 hour
Acceptance Test Hydrostatic Pressure Duration5 minutes
Key Formulas
Hoop Stress (σ) = p(dm - s) / 2s — Where p is internal pressure, dm is mean outside diameter, s is wall thickness.
Practical Notes
This is a multi-part standard where each part corresponds to a specific test (e.g., Part 1 for Dimensions, Part 8 for Hydrostatic Pressure). Always refer to the correct part for the procedure.
This code provides the 'how-to' for testing; the pass/fail criteria are typically specified in the relevant product standards (e.g., IS 4985 for uPVC water pipes).
Proper conditioning of test specimens at specified temperature and humidity before testing is crucial for accurate and repeatable results.