What conditions are required for process design?
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In process design, when completing the process flow diagram, certain requirements need to be provided to specialties such as equipment, instrumentation, electrical systems, and civil engineering. So what are these requirements? What is the basis for determining these conditions that have been proposed?
Your scope is indeed too broad; it essentially covers a large portion of the work involved in process engineering. 1. The requirements provided by the pure process engineering team to the civil engineering department are relatively limited, mainly focusing on fire zoning and the fire hazard classification of materials. 2. The requirements submitted to the equipment engineering team relate primarily to pressure, temperature, power requirements (such as those for mixing systems), and pipe connections. Special equipment and custom-made devices are not included in this scope—such as certain special types of reactors. 3. The electrical engineering team is responsible for determining the electrical load requirements, as well as the needs related to fire prevention and explosion protection (mainly concerning electrical cabinets, etc.). 4. As for instrumentation, it involves control logic, measurement logic, as well as data related to pressure, temperature, and the type of medium used. The detailed requirements are determined during the detailed design phase by the pipeline engineering team (in domestic design firms, process pipelines are not separated into distinct categories)
This range is too broad, and each design institute has different responsibilities.
It is recommended that LZ refer to the standard: HG 20558-93 Regulations on the Acceptance of Process Systems, Submission, and Finished Product Documents; I hope this will be helpful to you.
Reply 1# hlytyy Process design is the key and the foundation. Equipment forms the backbone of the technological process; during the implementation of this process, the form and basic parameters of the equipment are determined. It is necessary to specify the requirements for standard and custom-made equipment, based on the parameters of the technological process ； Instrumentation is the nervous system of a process flow; when creating a piping and instrumentation diagram, it is necessary to take into account the temperature, pressure, flow rate, liquid level, as well as various interlock controls within the process system. The so-called conditions are simply a way of presenting this information in a format that instrumentation specialists can understand and use to carry out their work. If one is designing the flow diagram themselves, determining these conditions should be merely a matter of time. Furthermore, once the processes and equipment are determined, load conditions can be specified for the structure; if the process pipelines are not separated, this also includes the first, second, and third-level conditions for the pipeline section, which mainly relate to loads, openings, platforms, etc. Electrical conditions are relatively simpler for the process; a list of requirements for electrical equipment is prepared based on the characteristics of that equipment, and hazard zones are designated by classifying hazards according to their nature. The above only covers some basic points; each design firm has its own set of rules, but they are generally similar.
You’d better take a look at HG20558; if that doesn’t work, then talk to the relevant specialists
You’d better take a look at HG20558; if that doesn’t work, then talk to the relevant specialists