Can water pressure really equal 200 tons of dynamite?

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Discussion Overview

The discussion revolves around the claim made by the Washington Post regarding water transmission lines being capable of exploding with the force of 200 tons of dynamite. Participants explore the validity of this claim, the context of pressurized pipes, and the implications of such pressures in water systems.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether the figure of 200 tons of dynamite is accurate, suggesting a possible error in the reporting.
  • Another participant expresses skepticism about journalists' ability to accurately report technical figures, implying that sensationalism may be at play.
  • Context is provided regarding the nature of the pressurized pipes, which are used for carrying drinking water and can be buried deep underground.
  • A participant references a video of a hydro facility explosion, noting that the damage observed was comparable to hundreds of tons of dynamite, raising questions about the scale of such incidents.
  • Concerns are raised about the characterization of a pipe rupture as an "explosion," with a suggestion that it may be more akin to a flash flood.
  • One participant shares a personal experience of hearing an explosion estimated at 15 tons of TNT, arguing that a failed dam would likely not produce an explosion of 200 tons of dynamite equivalent.
  • A request for pump information is made to better understand the operating pressures involved in the systems discussed.
  • A participant expresses suspicion that the original claim may be exaggerated to provoke public and political reaction regarding safety measures for the pipes.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the accuracy of the claim regarding the explosive potential of water transmission lines, with multiple competing views and uncertainties remaining about the context and implications of the reported figures.

Contextual Notes

Participants note limitations in the available information, such as the lack of specific pump data and the potential for misinterpretation of pressure levels in different types of water systems.

Larry Heflin
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Washington Post quotes water transmission lines
"highly pressurized pipes that can explode with the force of 200 tons of dynamite"
have they dropped a decimal point here?
Thats a lot of dynamite!

It's been years since I've tried such calculations and now couldn't even try...
 
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Journalists and numbers don't mix well, in my experience. That's why they became journalists in the first place.
 
What is the context of the "pressurized pipes"?
 
Carrying drinking water: up to about 77" diameter. Buried, usually beneath streets and sometimes in tunnels in soil or in rock up to some 150' deep. Mostly reinforce4d concrete: rarely steel. Pumped to water-towers and distribution.
 
There is a video of a Russian hydro facility that was devastated by exploding pipes because the operator mismanaged the water flow to the turbines. The damage did not seem that far out of line with hundreds of tons of dynamite. See:
 
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It would surprise me if aqueducts operated at anywhere close to the pressure of a hydro plant, but even if they did, it would be tough to characterize the rupture as an "explosion". More like a flash flood.
 
I once actually heard an explosion estimated at about 15 tons of TNT = 12 tons of dynamite. I was 20 miles away from where it happened and working underneath my car at the time. The bang was lound enough that people came out of the house, thinking the car had fallen off the ramp on top of me or something similar.

I don't think a failed dam would come anywhere near that sort of "explision", let alone 200 tons.

http://en.wikipedia.org/wiki/Flixborough_disaster
 
Do you happen to have any pump information? From the info you've given me we can only determine the hydrostatic portion. If you had the power output we would have a rough estimate of the operating pressure.
 
Thanks...but this is a quote from a facilities report...later quoted in the Washington Post...which I suspect is overblown (?) to excite the populace and politicians to require a setback from the pipes. I suspect a setback from a two hundred ton explosion would be unnecessarily costly.
 

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