- #1
rollingstein
Gold Member
- 646
- 16
Often there's these stories on TV about someone accidentally damaging a large diameter natural gas pipeline while digging a ditch etc. and then a huge raging fire.
What I'm wondering about is how frequently are shutoff valves installed on these lines. My intuition says ~30 miles apart at most. If so, how long does 30 miles worth of piped gas take to burn itself out. I'm just trying to get a rough estimate here.
In a flowing interstate pipe I think gas velocity is somewhere about 20 m/sec? Though not sure how to estimate the burn time after the valve is shut off.
What I'm wondering about is how frequently are shutoff valves installed on these lines. My intuition says ~30 miles apart at most. If so, how long does 30 miles worth of piped gas take to burn itself out. I'm just trying to get a rough estimate here.
In a flowing interstate pipe I think gas velocity is somewhere about 20 m/sec? Though not sure how to estimate the burn time after the valve is shut off.