TS ISO 14617-3

TS ISO 14617-3 covers graphical symbols used to represent connections and related devices in diagrams. This part provides a common symbol language for functional connections, mechanical links, pipelines, and associated devices such as connection joints, ISO ports, terminals, quick-release couplings, and connectors. In technical documentation, these elements matter because they show not only that components are joined, but also what kind of connection exists and how information, force, flow, or motion is intended to pass between items.

Why connection symbols need clear distinctions

In general technical practice, a connection symbol is more than a visual mark for “joined together.” Different connection types imply different physical behavior and different design intent. A mechanical link, a pipeline connection, and a terminal connection are not interchangeable concepts. This standard therefore supports consistent reading of diagrams by defining symbols for a focused set of connection-related elements. Within the ISO 14617 family, it addresses the connection-oriented portion of graphical symbols rather than the whole symbol system.

How this part relates to the wider ISO 14617 system

The standard refers users to ISO 81714-1 for the fundamental rules for creating and applying graphical symbols in diagrams, and to ISO 14617-1 for the overview of the series, registration numbers, and general rules for presenting and using symbols. That means TS ISO 14617-3 should be understood as a part standard focused on specific symbols for connections and related devices, not as a complete set of diagramming rules. In practice, these symbols are useful across machine engineering, piping systems, process plant documentation, and other technical diagrams where clarity and consistency are essential.

• Graphical symbols for functional connections
• Symbols for mechanical links
• Pipeline-related graphical representation
• Connection joints, ISO ports and terminals
• Quick-release couplings and connectors