Probably even a few with six or seven just to prove a point I suppose, but the number of lead sheets isn't important. Yeah, I realize some companies have more than two lead sheets, four or five even. Seriously, the significant digits are right here, I checked them. Here's the good news - these lead sheets include 90.00?0.05% of what you need to know. The lead sheets I provide in the supporting file download to this series include the following

Having seen a number of lead sheets over the years, I can tell you that most of them are just variations on a core set of generally accepted symbols and notations that engineers and industry organizations have settled on as defacto standards over the years. Every company that builds process plants should have a set of lead sheets customized to their particular ways and means. These are your 'secret decoder rings' to P&ID symbology interpretation. Lead Sheets Define SymbologyĪs I mentioned in Part 2, the meanings of the various symbols used on P&IDs (aka, symbology) are defined on separate drawings called 'Lead Sheets' (or Legend Sheets). If you think I short-changed any areas and would like more detail on any topic, please let me know via the comment system. I might even be pushing the limits of 's server capacity but I did my best to balance breadth of content with depth of detail. However, I'm going to warn you up front - this is a big part in the series, figuratively and literally speaking. That's the goal I had when I started this series and by golly, I'm sticking to it. With the requisite academics out of the way, it's time to focus on the exciting stuff - P&ID symbology interpretation.

How to read iso pipe drawings