Nice try Doom, but no cigar.
Location, location, location.
Hydrates would form at "bottom" sections of the pipe. At 70 m Bornholm is close to a
top. There are other points deeper and more likely based on geography, temperature
etc. But they were not "convenient".
And 4 explosions within 17 hrs in 4 pipes, same spot, 2 nonoperating for 1 yr, 2 non
operating for 2 months? Why it took so long for the NS2 explosions?
In any case the pipe will tell us if it was an "inside" or "outside" explosion job.
It is concluded that there are two main mechanisms of water accumulation in pipelines due to gravity i.e. accumulation at bottom section of the pipe and accumulation at the base of uphill/ sagging sections of the pipe. The accumulation phenomena is a compound effect taking place at the base of uphill section of the pipe for aforementioned reasons and is clearly visible in figure 2