What types of issues are generally encountered during drawing reviews?
Thread Content
Currently, the company has requested a design institute to prepare drawings for an 800,000-ton catalytic cracking plant, including drawings for the process systems, equipment, and process piping installations. Now, the company (the client) needs to work together with the design institute to conduct a preliminary review of these drawings. What problems will everyone encounter during the preliminary review, where should they start, and what issues might arise in the drawing design by the design institute? Everyone can talk about their respective specialties (processes, equipment, instrumentation, electrical systems, process piping installation, etc.). This post was last edited by shaohaoan on 2007-12-19 09:26]
No one answered, it’s so sad; I want to know too
There are too many issues in the preliminary review. For mature processes, things are relatively fine, but with immature processes, communication can be problematic; perhaps the design concept is flawed from the start. First, the drawings are reviewed through the standard process to identify any problems. Next, auxiliary pipelines related to startup and shutdown are examined, followed by an assessment of whether the control system meets the requirements, and whether the valve positions are appropriate in case of an accident. It’s also necessary to verify that the pipe diameters and insulation methods meet the process requirements. Once all this is done, the preliminary review is essentially complete. After that, a HAZOP analysis is conducted on the entire installation to identify potential risks, and it’s checked whether the countermeasures taken are sufficient; any deficiencies need to be addressed later. The design team also needs to clarify areas where there is excessive design, and so on. There are many such aspects, and it’s impossible to cover them all in just one or two paragraphs
There are many of these. What I do is to examine the materials used for the pipelines, their diameter, whether they are corroded, as well as the location of safety valves and pipelines, etc
Diagram numbers, work order numbers, upstream and downstream correspondences, horizontal/vertical piping diagrams, selection of piping and support materials (including types), piping length, as well as the length and quantity of fittings. . . There are too many things to pay attention to in the graphic review section
Evaluate the rationality of the process flow diagrams, controls, interlocks, etc.; check whether the pipeline layout is economical and safe, as well as whether the operation is simple