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What does NB stand for?

NB stands for Nominal Bore (internal diameter of a pipe/fitting)

This definition appears frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 34 other meanings of NB in our Acronym Attic

Samples in periodicals archive:

Fitted to the wall of the component, OE Flo-Tel is available for discs with a nominal bore of between 25mm and 100mm.
ILI service providers have been challenged with creating assessment techniques that not only navigate these changes to the inside of the pipe, but also detect and quantify damage affecting nominal bore.