If they are present in pipe tobacco, I am pretty sure they will remain dormant. Unlike cigars, pipe tobacco is to be stored in a cool, dry location. The beetle eggs should only hatch in the ideal conditions which is hot and humid, above 75-degree F.
Also, I assumed tobacco beetle was from tropical climates, making them inherent to locations such as the Dominican Rebuplic, Cuba and other cigar growing regions. I know pipe tobacco is grown all over the world, which would mean there have to be some locations that would be prone to beetle infestation. All that being said, I'm pretty sure it is Davidoff who put their cigars through a vacum to kill the beetle egg and protect the cigar. I would assume this would be much easier with pipe tobacco because there is no "shape" to protect.
In short, I would think tobacco beetle, though possibly present, are in much smaller numbers and much lower risk then when compared to cigars.