KAR Group’s Erbil Refinery is a mission‑critical petrochemical complex operating in a high‑temperature, dusty, and potentially explosive atmosphere. The client required a plant‑wide PAGA system that would guarantee clear voice and alarm coverage, comply with ATEX/IECEx and EN 54‑16 safety standards, and integrate seamlessly with the Distributed Control System (DCS), telephony, and security subsystems.