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The review meeting for the 90% process models of the dimethyl oxalate unit and the ethylene glycol unit in the ethylene glycol production project of Shaanxi Coal Yulin Chemical was successfully concluded. Author/Source: Shaanxi Coal Group Yulin Chemical Company. Date: June 26, 2020. Clicks: 58. From June 16 to 23, the review meetings for the 90% process models of these units as part of the company’s 1.8 million tons per year ethylene glycol production project were held at Donghua Technology. Relevant leaders and professional engineers from Yulin Chemical, Beijing Xinggao Chemical Technology Co., Ltd., and Donghua Engineering Technology Co., Ltd. attended this model review meeting. This review focused on aspects such as equipment layout, pipeline routing, instrument placement, and maintenance procedures. It took full account of small-diameter pipelines, pipe racks, instruments, all components, the final version of the equipment model, as well as the final online and offline instruments. Special attention was paid to whether the suggestions from the 60% model review had been addressed, as well as the routing of small-diameter pipelines with a diameter of less than two inches. By optimizing the design scheme, the final design review will help reduce the project’s investment costs. During the review meeting, the company’s various technical professionals, drawing on their practical experience in engineering projects, communicated actively with the design firms and patent holders. From the perspectives of safety, processes, operation, and maintenance, they reviewed and improved the layout of the plant’s pipelines, thereby ensuring the accuracy and rationality of the design work. The 90% process model review is the most important review step following a series of reviews such as the 30% model, 60% model, HAZOP, PID diagrams, and control logic; it represents a crucial stage prior to the preparation of the detailed design drawings. The successful conclusion of this review meeting ensures the convenience and feasibility of subsequent operation, maintenance, and repair of the facility, thereby laying a solid foundation for its full transition to the construction and installation phase.