The ignition risk of materials in oxygen environments is influenced by oxygen pressure and is evaluated by organizations like NASA and ASTM. Gold exhibits excellent oxygen compatibility, meaning it is unlikely to ignite. While some references suggest limited economical materials for oxygen systems, copper and brass pipes are frequently used safely at pressures up to 3000 psi without significant ignition risk. Understanding these properties is crucial for safe handling and application in industrial settings. Proper material selection is essential to prevent hazardous reactions in oxygen-rich environments.