Maintain an internal process for verifying component wetted material compatibility for intended use as part of the procurement process for hydrogen system equipment. It is critical that component parts be appropriately rated for the materials, pressures, temperatures, and other conditions experienced during operation of the system in which they are a part. Don’t rely solely on a manufacturer to provide appropriately rated materials and components. Verify components and their specifications as early in the design or procurement process as possible. Manufacturer-provided literature (brochures, instruction manuals, bills of materials, etc.) may not always identify the specific materials for each component, so verification may require Internet research or contacting the manufacturer to obtain the necessary information or certification. (Reference https://h2tools.org/tech-ref/technical-reference-for-hydrogen-compatibi…)