This post is going to be half rant, half explanation of what is wrong with a few of the dimensioned drawings I’ve found recently. Consider this an example of what not to do.

THIS book gives in full detail the elementary courses of engineering drawing as taught to young midshipmen in the Navy of the Unite States of America. The instruction is arranged on the assumption ...

While ISA-5.1 deals with instrumentation and control content on various engineering drawings, including PFDs and P&IDs, this new TR will provide guidance and examples specific to PFDs and P&IDs.