本RP提出了设计、安装和测试水下应用过程安全系统的建议。讨论了水下安全系统的基本概念，概述了系统的保护方法和要求。就本RP而言，“水下系统”包括从井口（和地面控制地下安全阀[SCSSV]）到登机关闭阀上游的所有工艺部件。对于注气、注水和气举系统，关闭阀在API 17V的范围内。这还包括化学注入系统。本文件范围内的水下系统包括:水下采油树（生产和注入）、流线和SCSSV；化学注入管线；流形；海底分离；海底增压；海底压缩；流线；气举； 高完整性压力保护系统（HIPS）；海底隔离阀；竖管；液压动力装置。安全系统包括生产系统中的阀门和流量控制装置。安全系统还包括安装在生产系统中的传感器，用于检测异常情况，并允许采取纠正措施（手动或自动）。目的是设计符合IEC 61511要求的水下安全系统；本文件补充了这些要求。介绍了常见安全装置的测试程序，以及测试数据、测试频率和可接受测试公差的建议。不讨论仪表逻辑电路，因为只要完成了建议的安全功能，这些电路就应由设计师自行决定。旋转机械在本RP中被视为一个统一的工艺组件，因为它与水下安全系统相连。 当旋转机械（如泵或压缩机）作为一个由多个工艺部件组成的单元安装时，可按照本RP中的规定对每个部件进行分析。

This RP presents recommendations for designing, installing, and testing a process safety system for subsea applications. The basic concepts of subsea safety systems are discussed and protection methods and requirements of the system are outlined.For the purposes of this RP, 'subsea system' includes all process components from the wellhead (and surface controlled subsurface safety valve [SCSSV]) to upstream of the boarding shutdown valve. For gas injection, water injection, and gas lift systems, the shutdown valve is within the scope of API 17V. This also includes the chemical injection system.Subsea systems within the scope of this document include:subsea trees (production and injection), flowlines, and SCSSVs;chemical injection lines;manifolds;subsea separation;subsea boosting;subsea compression;flowlines;gas lift;high integrity pressure protection system (HIPPS);subsea isolation valves;risers;hydraulic power unit.The safety system includes valves and flow control devices in the production system. The safety system also includes sensors installed in the production system to detect abnormal conditions and allow corrective action to be taken (whether manual or automatic).The intention is to design subsea safety systems to meet the requirements of IEC 61511; this document supplements these requirements.Procedures for testing common safety devices are presented with recommendations for test data, test frequency, and acceptable test tolerances.Instrumentation logic circuits are not discussed since these should be left to the discretion of the designer as long as the recommended safety functions are accomplished. Rotating machinery is considered in this RP as a unitized process component as it interfaces with the subsea safety system. When rotating machinery (such as a pump or compressor) is installed as a unit consisting of several process components, each component may be analyzed as prescribed in this RP.