Common use of Atmospheric exposure test Clause in Contracts

Atmospheric exposure test. The atmospheric exposure test applies to qualification of check valve and automatic shut-off valves if the component has non-metallic materials exposed to the atmosphere during normal operating conditions. (a) All non-metallic materials that provide a fuel containing seal, and that are exposed to the atmosphere, for which a satisfactory declaration of properties is not submitted by the applicant, shall not crack or show visible evidence of deterioration after exposure to oxygen for 96 hours at 70 °C at 2 MPa in accordance with ASTM D572 (Standard Test Method for Rubber- Deterioration by Heat and Oxygen); (b) All elastomers shall demonstrate resistance to ozone by one or more of the following: (i) Specification of elastomer compounds with established resistance to ozone; (ii) Component testing in accordance with ISO 1431/1, ASTM D1149, or equivalent test methods.