Data Center Cooling & Drain Piping Failure Analysis

The Stakes

The Stakes: Plastic Pipe Is Cheap. A Cooling Outage Is Not.

PVC and CPVC are chosen for corrosion resistance, light weight, and low installed cost. Corrosion resistance is not the same as chemical resistance. CPVC is not resistant to most hydrocarbon chemicals, and process fluids, inhibitors, and additives are a recurring source of contact the piping was never qualified against (see CPVC chemical resistance). Because environmental stress cracking in CPVC and PVC is now a recognised risk, some new data centers are specifying PE or PP-R instead, materials with different failure modes that need their own compatibility review. Over a multi-year program our experts were retained to investigate a series of polymeric piping and component failures across several mission-critical data-center campuses for a major data center operator. The failures spanned 2½ to 6 inch diameters, multiple polymers, and both pressurized cooling loops and gravity drain lines. The recurring theme: the plastic itself was rarely the villain. Most failures traced back to chemistry the system was never designed to see, joints that were not made correctly, or pressure transients the layout could not absorb.

Three things every plastics engineer watches for

Fractography

Reading the Fracture: Every Mechanism Leaves a Tell

Each failure mode writes its own signature into the fracture surface, and reading those signatures is central to how our experts determine root cause. Chemical stress cracking, high-speed fracture, an unbonded joint, and mechanical overload each leave a distinctive pattern that our microscopic and fractographic examination reveals.