In the world of piping engineering, precision is non-negotiable. Adhering to standards like GB/T 9112-2000 ensures seamless compatibility and safety across global supply chains.
We’ve compiled the complete reference chart detailing the relationship between Nominal Pipe Size (DN) and Outside Diameter for both European and American systems.
Essential data for engineers, fabricators, and procurement teams.
A quick guide to prevent costly sizing errors in your next project.
All data are sourced from publicly available sources and are provided for learning, communication, and reference purposes only. If there are any errors, please contact for correction. Please make your own judgment, this website assumes no responsibility.