本推荐规程涵盖了管道运行期间进行的管道下放或其他移动操作的设计、执行、检查和安全。（在本文件中，术语“降低”和“移动”可以互换使用。）建议在不移动管道的情况下进行该操作。它还提出了估算诱导应力的方程式。为了提高移动操作的安全性，它描述了应力限制和程序。此外，还概述了保护管道免受损坏的建议。考虑了沟槽类型、支撑系统和降低或其他方法的实用性和安全性。介绍了检查程序和限制。

This recommended practice covers the design, execution, inspection, and safety of a pipeline-lowering or other movement operation conducted while the pipeline is in service. (In this document, the terms lowering and movement can be used interchangeably.) This recommended practice presents general guidelines for conducting a pipeline-movement operation without taking the pipeline out of service. It also presents equations for estimating the induced stresses. To promote the safety of the movement operation, it describes stress limits and procedures. Additionally, it outlines recommendations to protect the pipeline against damage. The practicality and safety of trench types, support systems, and lowering or other methods are considered. Inspection procedures and limitations are presented.