| Aspect | 2002 version | 2021 version | |--------|--------------|---------------| | | Good | Improved for digital use | | New symbols | Missing some modern connectors | Added symbols for fiber optics, wireless, and advanced bus systems | | Terminology | Legacy terms | Aligned with IEC 81346 and ISO 81714 | | Layout rules | Basic | More detailed rules for scalable diagrams |
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Physical rods, linkages, and mechanical tethers transferring force or motion.
ISO 14617-3:2002 - Graphical symbols for diagrams — Part 3: Connections and related devices iso 146173 pdf updated
In dense layouts, lines inevitably cross. ISO 14617-3 explicitly defines how to represent overlapping lines to avoid dangerous ambiguity. For instance, a basic crossing of lines without a junction is classified under specific operational definitions like symbol X401 , guaranteeing that an engineer in Europe and an assembler in Asia read the separation identically. 2. Quick-Release Couplings
The standard library for industrial engineering diagrams has entered a major evolutionary phase. If you are searching for the document, it is highly likely you are looking for ISO 14617-3:2002 (Graphical symbols for diagrams — Part 3: Connections and related devices) or tracking the broad 2025/2026 consolidation updates to the ISO 14617 series . Because "146173" consolidates the main standard number (14617) and its specific part (Part 3), understanding these structural revisions is critical for mechanical engineers, piping designers, and systems architects.
┌──────────────────────────────┐ │ ISO 14617 Symbol Anatomy │ └──────────────┬───────────────┘ │ ┌────────────────────────────┼────────────────────────────┐ ▼ ▼ ▼ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │ Basic Symbols │ │ Supplementary │ │ Symbol Examples │ │ (e.g., GSD) │ │ (Modifiers) │ │ (e.g., GSD X) │ └─────────────────┘ └─────────────────┘ └─────────────────┘ | Aspect | 2002 version | 2021 version
If you just need to read symbols for a specific project → check if your employer already has an ISO subscription or use IEC 60617 as a free alternative.
Detailed components (Valves, Pumps, Heat Transfer, etc.).
By combining Part 3 with other parts, engineers can build a comprehensive and professional schematic representation. ISO 14617-3 explicitly defines how to represent overlapping
: It provides a framework for managing data through the entire lifecycle of a process plant, from conceptualization through decommissioning. This helps in making the data usable and accessible for various applications across different phases.
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