Product or part whose failure to function as intended results in a release of retained fluid to the atmosphere.
Source: API STANDARD 18LCM, Product Life Cycle Management System Requirements for the Petroleum and Natural Gas Industries, First Edition, April 2017. Global Standards
Part whose failure to function as intended results in a release of wellbore fluid to the environment (API 6A).
Source: API TR 1PER15K-1, Protocol for Verification and Validation of High-pressure High-temperature Equipment, First Edition, March 2013. Global Standards