Design and Operation of Subsea Production Systems — General Requirements and Recommendations Provides general requirements and re commendations for the development and operation of subsea production/inj ection systems, from the concept development phase to decommissioning and abandonment. This document references other API 17 - series documents, as well as various relevant industry documents. A complete subsea producti on/ injection system comprises several subsystems necessary to produce hydrocarbons from one or more subsea wells and transfer them to a processing/host fa cility located offshore (fixed, floating, or subsea) or onshore, or to inject wate r/gas via subsea facilities and/or wells