PMI (Positive Material Identification) ensures material compliance, particularly in high-energy piping, drums, and pressure vessels. It identifies material composition using handheld analysers (XRF) to verify the correct materials and prevent failure. Additionally, it confirms alloy grades, especially in critical systems, and helps detect counterfeit or mixed materials. This process prevents potential safety hazards and operational issues and is conducted during fabrication, installation, and maintenance to support asset integrity and regulatory compliance.