I am certainly no expert because I don't know what you mean by "bead on plate". Can you explain further?
All,
For those who wants to know more about BOP please refer to BS 7363:1990 code.
Hope that's will explain.
Moh
The bead-on-plate test is generally used to determine the minimum heat input &/or length of weld required in order to avoid anacceptably hard microstructures.
When I see plan views of piping drawings or orthographic drawings of piping systems, BOP refers to elevations (usually) as Bottom of Pipe. I am not sure if this is the case in your situation, but it might be though.
I agree with George. BOP could mean a number of things including balace of plant but the request was specific to bead on plate which deals with hardness and possibly impact testing.
I thought BOP was a Blow Out Preventer