BOP Stack Maximum Rated Wellbore Pressure
The pressure containment rating of the ram BOPs in a stack. Note: In the event that the rams are rated at different pressures, the BOP stack maximum rated wellbore pressure is considered equal to the lowest rated ram BOP pressure. In stacks that do not contain any ram BOP, the BOP stack maximum rated wellbore pressure is considered equal to the lowest rated BOP pressure.
Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards