API RP 17G5

This document provides the requirements for the design, manufacture, and testing of intervention workover control system (IWOCS) equipment typically used in a thru-blowout preventer intervention riser system and an open-water intervention riser system.

Some requirements in this document are specific to the execution of end user?defined safety functions. This document defines ?safety class control functions? used to operate safety class devices. This document provides guidance on the determination of safety class control functions based on the end user?provided safety functions.

Blowout prevention (BOP) control systems are outside the scope of this Recommended Practice and typically are not connected to the IWOCS.