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What does BB stand for?

BB stands for Bolted Bonnet

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

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We have 199 other meanings of BB in our Acronym Attic

Samples in periodicals archive:

The new line is available in sizes DN6 -- DN300 (1/4 inch -- 12 inches) and incorporates an anti-blowout spindle, anti-liquid lock drain and the unique Bestobell loose flange bolted bonnet design - which allows for thermal expansion and contraction and eliminates leakage at the bonnet gasket.