BB
BB is an abbreviation of Bolted Bonnet
it refers to a valve construction where the bonnet (cover) is secured to the valve body using bolts
or stud bolts.
BBE
BBE is an abbreviation of Beveled Both Ends
Beveled Both Ends means that both ends of e.g. a pipe nipple are beveled.
BE
BE is an abbreviation of Beveled Ends
Beveled Ends are applied to all diameters of buttweld pipes, flanges, fittings, valves etc.
BOM
BOM is an abbreviation of Bill Of Materials
More about BOMBW
BW is an abbreviation of Butt Weld(ing)
More about Butt Welding