1.1 This guide applies to nonmetallic materials, (hereinaftercalled materials) under consideration for oxygen or oxygen-enriched fluid service, direct or indirect, as defined below. It isintended for use in selecting materials for applications inconnection with the production, storage, transportation,distribution, or use of oxygen. It is concerned primarily withthe properties of a material associated with its relative suscep-tibility to ignition and propagation of combustion; it does notinvolve mechanical properties, potential toxicity, outgassing,reactions between various materials in the system, functionalreliability, or performance characteristics such as physicalaging, degradation, abrasion, hardening, or embrittlement,except when these might contribute to an ignition.
