Key points for reviewing chemical engineering design models
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This post was last edited by WiseMind on 2024-11-10 at 19:42. During the detailed design phase of chemical engineering projects, there are generally three stages: 30%, 60%, and 90%. At each stage, a model review is conducted with the client. The depth and focus of these three reviews vary from one another. Below, we will discuss in detail the required level of completeness for the models at each stage, as well as the key aspects to be emphasized during the reviews. I. 30% model review. The main purpose of the 30% model review is to determine the layout of major process equipment, as well as the layout and stress conditions of important process pipelines, the arrangement of large-diameter pipes, etc. Documents required at this stage: preliminary PID, preliminary layout plan, preliminary general plan, equipment drawings or equipment specification drawings, pipeline material grade table, pipeline characteristics table, etc. Contents that the model must include: main equipment models, all major pipeline models (main circulating water pipelines, main steam pipelines, important process pipelines, etc.), important equipment maintenance spaces, preliminary building structures, framework and pipe rack models, preliminary layout of main electrical and instrumentation cable trays, as well as stress calculation results for important process pipelines, steam pipelines, etc. Key points for model review: Whether the layout of major equipment is appropriate, availability of maintenance space, and whether the equipment frames are suitable ； The main process pipelines, whether the layout of the large pipes is appropriate, etc.
This post was last edited by Zhi Zi Ming on 2024-11-10 at 19:42. II. 60% Model Review: The 60% model review is the most important of these three reviews. The 30% review mainly involves confirming the plan, while the 60% review is more thorough and comprehensive; aside from a few issues that do not affect progress, most problems need to be resolved during this review. The results of the 60% review also determine whether the project can be completed on schedule with high quality. The purpose of the 60% model review is to reconfirm the equipment layout, check whether the path of the main pipelines is appropriate, whether there is sufficient operating space for equipment valves, etc., whether the process requirements are met in the design, whether the stress on the main pipelines is within acceptable limits, as well as the layout of structures, platforms, and instrument and electrical trays. Requirements for 60% model review: P&ID, equipment layout plans and general layout drawings, equipment diagrams, civil and structural drawings, flow meter data, control valve data, data on special pipe fittings, safety valve data, data on other instruments, pipeline index tables, etc. Conditions that the model must meet: Device model ； Main pipelines ； Structural model ； Operation channel and platform ； Electrical and instrumentation tray ； Instrument electrical junction boxes, etc ； Stress bracket ； Venting range simulation ； Nozzle orientation diagram ； Stress calculation results ； Architectural models ； Structural and equipment foundations. Main contents of 60% review: relevant models such as review and operation, construction, and safety ； Review all vent pipe models and routes ； Inspect the operability of facilities such as valves that require operation, as well as the operation platforms ； Check whether the route of the main pipeline meets the requirements ； Check whether the requirements of the process are met ； Review whether Party A’s requirements are met ； Review whether the operating passages and escape routes meet the requirements in terms of space ； Review the equipment core extraction and equipment lifting space.
This post was last edited by WiseMan on 2024-11-10 at 19:43. III. 90% Model Review The 90% review is a review conducted prior to drawing issuance. Besides checking for compliance with the requirements outlined in the 60% review, it is also necessary to verify whether each component aligns with the P&ID. Additionally, pipelines related to startup and shutdown procedures, as well as operational aspects, must be examined. Conditions that 90% of model reviews should meet: P&ID ； Final version of the equipment diagram ； All instrument, valve, and special part data. Depth supported by 90% of models: all devices ； All pipes ； All structural models ； All channels, maintenance spaces, and operation platforms ； Electrical and instrumentation tray ； Instrument electrical junction box ； Pipe support and hanger model ； Architectural models ； There should be no actual collisions. 90% model review content: Apart from the 60% of comments, the other review contents are basically consistent with those of the 60% review.