API XX Grade B or is it an A-10X or A-2XX grade B???
In other words, are there any markings on the pipe which would give us more specific details as to what is the type of alloy you're dealing with because just saying: "Grade B" is not enough information to offer help... are there any numbers to the left of "Grade B" on the pipe itself? If you could post them, then we might be able to help, or if you have any access to some paper work for the pipe in question.
Respectfully,
Henry