: Points where circuits, pipes, or components break or fuse.
: The most direct way to purchase is through the ISO member body in your country. For example:
Historically, the ISO 14617 standard was highly segmented. Originally introduced as a 15-part series (Parts 1 through 15), it served as a sprawling library of harmonized symbols created in cooperation with the International Electrotechnical Commission (IEC). iso 146173 pdf updated
Historical context and purpose
Representation of T-joints, ports, terminals, and quick-release couplings. Why the Update Matters : Points where circuits, pipes, or components break or fuse
How to obtain and apply the updated PDF
The publication of the second edition of the ISO 14617 series marks a significant step forward in standardizing technical communication. The new versions, such as ISO 14617-1:2025 and ISO 14617-2:2025, have modernized the symbol library, removed obsolete elements, and clarified the relationships with other specialized standards. Originally introduced as a 15-part series (Parts 1
The primary source for the official ISO 14617-3:2002 (with amendments) PDF.
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