Hey everyone from the design institutes, do you also create so many versions when drawing diagrams?
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As the title suggests, the specifications state that there are many versions of a single diagram, but in reality I’ve only seen two versions. Is it because our company is relatively small, or what’s the reason? When actually designing something, is it really necessary to go through all those versions as specified in the guidelines? It seems that many of these versions involve only minor tweaks – there isn’t much difference between them. Can’t we just get it right from the start and make adjustments gradually? Is it really necessary to have so many versions?
Questions regarding the edition of P&ID diagrams: http://bbs.hcbbs.com/thread-905706-1-1.html (Source: Haichuan Chemical Industry Forum)
Do not use “version”; it should be “edition”. Refer to HG20519-2009 Unified Specifications for the Content and Depth of Construction Drawings in Chemical Process Design
Hey, our company isn’t very large either. Regarding version issues, we actually have two official versions: the preliminary design and the construction drawing design. As for those A, B, C, D versions mentioned in the standards, at least we haven’t issued them as official documents within our company. Anyway, meetings are held frequently during these two design stages to make adjustments, so there’s no need to distinguish between different versions. A revised version is shown to the client; if they have any comments, further revisions are made until the client gives approval, and then it’s okay to produce the final drawings. I’m wondering if it’s only those first-class engineering companies that organize things in this way
Yes, that’s also how we do it here. For the preliminary design and the construction drawings, we often make adjustments and improvements on our own when we have time. It seems there aren’t as many versions required as specified in the standards; I’m not sure if other large design firms follow those standards strictly
From the perspective of standardizing design management, I would also like to remind that “edition” is not the same as “version”. Firstly, preliminary design and construction drawing design are two distinct design phases, with each phase providing design documents of varying levels of detail ； Secondly, the design documents for each phase have different versions ； Third, edition design is an essential path for standardized design management, and it is independent of design qualifications and levels.
Preliminary design (basic design) phase: The preliminary design provides all the necessary information for carrying out the construction drawings (detailed design), as well as the requests for purchasing equipment and materials. This includes, but is not limited to, piping and instrumentation diagrams (PID), sketches for equipment calculations and analysis, design specifications, material selection documents, equipment layout plans (by zone), piping layout plans (by zone), underground pipeline networks, and electrical single-line diagrams.
Construction drawing design (detailed design) phase: All the detailed drawings and documents required for construction are provided, serving as a basis for construction and for placing additional orders for materials. These include, but are not limited to, detailed piping diagrams, pipe section diagrams (single-line diagrams), foundation plans, structural diagrams, instrumentation design diagrams, electrical design diagrams, equipment manufacturing drawings, and all other drawings and documents needed for construction.
Construction drawing design (detailed design) phase: All the detailed drawings and documents required for construction are provided, serving as a basis for construction and for placing additional orders for materials. These include, but are not limited to, detailed piping diagrams, pipe section diagrams (single-line diagrams), foundation plans, structural diagrams, instrumentation design diagrams, electrical design diagrams, equipment manufacturing drawings, and all other drawings and documents needed for construction.
Each version of a drawing or document corresponds to a specific project phase, with different purposes for release and varying levels of detail required. For the purpose of issuing P&IDs, the common versions include IFR (for internal use by professionals), IFA (for owner approval), IFH (for HAZOP studies), IFF (for FEED documents), IFD (for detailed design), and IFC (for construction). Depending on the project, it is possible to decide which versions to use; if a version requires many modifications, two separate versions can be created.
All of these requirements are specified in the codes. My question is whether the design institutes follow strictly all the versions outlined in those codes
This is determined by the size of the company, the scale of the project, and the requirements of the client; it cannot be generalized. If it were a domestic Class B design institute, I doubt it could produce that many editions. Six months is considered a long time for a project; for large EPC projects, the time between two versions can even take a year.
Between the major versions, there are also minor versions. For example, the detailed design IFD-1 is essentially a copy of the preliminary design; IFR-1 is intended for a 30% model review, while IFD-2 represents the first version of the detailed design created by itself, and IFR-2 is used for a 60% model review. IFD-3 is already a fairly mature design; IFR-3 is designed for 90% model review, and then there’s IFC, AB.