I am referring to cross country pipelines and the main line block valves utilized in this application only. I am strictly concerned with placement, i.e., above ground versus below ground. No major pipeline company in the country places these valves above ground (except at stations) and I was...
For main line block valves above 12" it is clear that virtually no one in the industry locates these above grade. This makes sense intuitively but is there any discussion in the industry as to why?
