What stages do the 60% model reviews represent respectively?
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Not long ago, I came across a news item stating that recently, the gas separation unit of the 500,000 tons per year coal-based ethanol project at Yushen Energy Chemical, which is under EPC general contracting by Beijing Petrochemical Engineering Co., Ltd., successfully passed a 60% scale model review in Xi’an; the project owner and the project team were present at this review. I would like to ask everyone here: what stages do 30% model review and 60% model review represent respectively? ?
This post was last edited by zqwqiwu123 on 2020-12-2 at 10:22: the review of piping model drawings when the device design workload is 30% and 60%.
That is, the 3D model diagram for the piping specialty
1. The factory’s 3D model design has several checkpoints, which include a 30% model review, a 60% model review, a 90% model review, and a HAZOP review； 2. Model review at 30%, 60%, ... is only available for design projects using 3D design software (such as PDS, PDMS, etc.); it is not possible to conduct model review for design projects using 2D design software (such as CAD, etc.) ； 3. The 30%, 60%, ... model reviews are conducted by the heads of various departments in the design institute together with the client, using the review systems in 3D software or specialized Smart Plant Review tools. In these reviews, the actual site conditions are simulated through projections, and reasonable suggestions and opinions are provided from engineering, operational, and professional perspectives, afin of further optimizing the design.
The focus of the 30% model review (equipment positioning review) is: 1. The positioning of all equipment and the orientation of their openings； 2. Framework (steel and concrete) and buildings ； 3. Main operation passages and ladders ； 4. Major large-diameter pipes or key process pipes ； 5. Equipment and unit orientation ； 6. Reserved escape route ； 7. Pipe corridors and main pipeline support frameworks ； 8. Shape of the underground cable trench for instrument electrical systems ； 9. Space for lifting/extracting cores, location occupied by the mobile crane.
The focus of the 60% model review is: 1. All pipelines are basically completed； 2. Platform ladders on towers and equipment ； 3. Fixed crane and its beam ； 4. Valve operation platform ； 5. Final dimensions of the steel structure and building ； 6. Eyewash station positioning ； 7. Local control panel ； 8. Fire protection system ； 9. Instrument connectors ； 10. Surface instrument cable trunking. A 60% model review is crucial for the layout of pipes and equipment; once approved, the construction drawings (AFC version) can be issued to the construction site and prefabrication site.
A 60% model review is crucial for the layout of pipes and equipment; once approved, the construction drawings (AFC version) can be issued to the construction site and prefabrication site. ============================= This means that the detailed design for the piping system has been completed, and the factory can start construction
One question: what about the pipe material? ? Do we have to wait until 60% of the drawings are available before making the purchase? Especially some long-cycle valves, control valves, and so on? ? ?
Yes, material lists and construction drawings with accurate data after 60%. However, due to the high quality of 3D design, it is possible to **improve the factory’s prefabrication capacity (the amount of pipe segments that can be prefabricated). It is usually between 60 and 75, thereby accelerating the construction progress and shortening the construction period. A very small number of long-cycle, critical materials, such as high-pressure valves and special material pipe sections, have design parameters available in the 3D material database, allowing for advance procurement.
Due to the deep prefabrication of the complete sets equipped with 3D design, the on-site installation period is generally short; for large-scale projects, this period consists of 6 to 8 months for installation plus testing with water, and in some cases it is even shorter.
Is 30% sufficient to obtain the construction drawings? ? ?