Document Projects Consistently with the Updated ISA5.1 Standard

The 2024 revision

The 2024 revision of this standard changed the title from “Instrumentation Symbols and Identification” to “Instrumentation and Control Symbols and Identification” to emphasize that symbols for control are also included. This revision was published with significant changes to improve the readability of the document by organizing notes with corresponding tables; simplifying table numbering; providing definition consistency and clarification; eliminating redundant text; by adding new symbols, recognizing alternate symbols, notation and identification for new automation technology; adding new sections for normative reference, abbreviation and bibliography; and adding the loop instrument diagrams symbol table. The changes made in the 2024 revision are listed in Annex A of that document.

This revision moved nonmandatory Annex A and Annex B from the 2022 revision into separate technical reports for easier maintenance and to reduce the size of the standard. The new technical reports are ISATR5.1.02, “Instrumentation and Control Identification System Guidelines,” and ISA-TR5.1.03, “Instrumentation and Control Graphic Symbols Guidelines.” These TRs provide examples and information on the application of requirements in the standard. Examples in these TRs were updated with additions, revisions and deletions. The changes made in these TRs are listed in Annex A of the respective document. Users are encouraged to read and use these TRs together with the standard.
 

Looking ahead

The plan for the ISA5.1 Working Group of the ISA5 committee is to now develop a technical report on instrumentation and control content of PFDs and P&IDs. While ISA5.1 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. This will include guidance to help users decide on the level of detail of instrumentation and control they want to show on their PFDs and P&IDs and what information should be provided at a minimum.

The updated ISA5.1 standard and its accompanying ISA technical reports are available for purchase online. Anyone interested in participating in the ISA5.1 Working Group is asked to contact ISA Standards (standards@isa.org). For information on obtaining any of ISA standards documents and reports, visit www.isa.org/findstandards.

This feature originally appeared in the October 2024 issue of InTech digital magazine.