Specific lines for main, auxiliary, and flexible pipelines.
Symbols are now prefixed with " GSD " (Graphical Symbols for Diagrams) followed by a four-digit number (e.g., GSD 0401 for a basic connection).
Technologically obsolete symbols, particularly in instrumentation and control, were deleted to ensure the standard reflects current industrial practices. How to Access the Updated PDF iso 146173 pdf updated
The original was officially withdrawn on April 25, 2025. In a significant move to streamline technical documentation, ISO has consolidated the previously separate parts of the 14617 series.
The technical content of Part 3 (Connections) has been merged into the newly published ISO 14617-2:2025 . Specific lines for main, auxiliary, and flexible pipelines
Are you updating a or a specific set of P&ID drawings to comply with these new 2025 standards?
The presentation structure was redesigned to make it easier for CAD users to find specific symbols. How to Access the Updated PDF The original
Because ISO standards are protected by copyright, they are not available for free public download. You can purchase and download the authorized, updated PDF from official sources:
Many users prefer to buy through local organizations like BSI Knowledge (UK) or ANSI (USA) .
The standard, titled "Graphical symbols for diagrams — Part 3: Connections and related devices," is a critical document for engineers and technical designers. It provides a standardized library of symbols used to represent functional connections, mechanical links, and pipelines in technical diagrams.