This document is a review of a mechanical engineering project that involved refinery oil production. The project was executed by ARAMCO with TECHNIP as the contractor and Al Husam General Contracting LLC as the sub-contractor. The location of the project was in Riyadh. The review covers various aspects, including design, fabrication, installation, testing, and pre-commissioning. It also discusses issues faced during the project, such as problems related to piping and initial stage hydrostatic test, and their respective solutions. Additionally, it highlights the quality control process, which involved raising the general level of value administration, setting up corporate images, and reinforcing aggressiveness in development. The document aims to provide an overview of the project's execution, including its challenges and solutions.