What does it take to earn IRAM certification for PPH threaded pressure piping systems? Let's break down the testing process—because "rigorous" is an understatement here.
Material Purity and Composition
First, IRAM inspectors analyze the raw PPH material itself. They check for impurities, consistency in polymer structure, and compliance with chemical composition standards. Even small deviations—like adding cheap fillers or recycled plastics—can weaken the pipe, so IRAM ensures only high-grade, virgin PPH is used.
Hydrostatic Pressure Testing
Next comes the pressure test, a make-or-break step for any piping system. IRAM subjects PPH pipes to hydrostatic pressure testing, where the pipe is filled with water and pressurized to 1.5 times its maximum working pressure for an extended period (often 1,000 hours). Why? To simulate decades of use in high-pressure environments, like commercial buildings or industrial facilities. If a pipe leaks, warps, or bursts during this test, it's rejected immediately.
Thermal Cycling and Temperature Resistance
Pipes don't exist in a static environment—temperatures fluctuate, especially in systems carrying hot water or exposed to outdoor conditions. IRAM's thermal cycling test subjects PPH pipes to extreme temperature changes, from -10°C to 95°C, repeated over hundreds of cycles. This ensures the material won't become brittle in the cold or soft in the heat, two common causes of failure in low-quality plastics.
Impact and Chemical Resistance
Accidents happen: pipes get bumped during installation, tools drop on them, or they're exposed to harsh chemicals (think cleaning agents in hospitals or industrial solvents). IRAM tests PPH pipes for impact resistance by dropping heavy weights on them at low temperatures (when plastics are most brittle) to ensure they don't crack. They also expose pipes to a range of chemicals—acids, alkalis, and oils—to verify that the material won't corrode or degrade over time.
Dimensional Accuracy and Thread Integrity
Even the strongest pipe is useless if it doesn't fit properly. IRAM checks every dimension of PPH threaded pressure piping systems, from wall thickness to outer diameter, ensuring consistency across batches. Threads are inspected for precision, too—loose or misaligned threads can cause leaks at joints, so IRAM certifies that threads meet exact specifications for a tight, secure fit.