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Sewer main explosion.
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Previously:
Burst sewer pipe spewing sewage on car - GIF
Fumigating a sewer - GIF
Main sewer pipe bursting - GIF
Massive sewer explosion - GIF
Renovating a sewer shaft - GIF
Sewer inspection drone - GIF
Sewer maintenance machine - GIF
Sidewalk sewer explosion - GIF
First who writes these descriptions?
A sewer is gravity fed. Open to the atmosphere. Little to no pressure unless there's a a whole bunch of hills and even then there are catchments to slow the water to a reasonable speed.
Potable water on the other hand is pressurized. When I ran tests on water pressure for hydrants we measured from 85PSI to 110PSI on 8 inch mains. Plenty of energy to create havoc.
Mark
Maybe a build up of flammable gas (methane) and it ignited...
(I feel sorry for the old lady covered in sh!t)
On the other hand, this is the image attached to the email for this:
Attachment 49460
Thought someone exchanged too much beer...
Maybe drinking too much Qingdao beer causes more methane.Quote:
Originally Posted by imohtep56
Remember that sewers are open to the atmosphere for exactly this reason. The secondary reason is that the water flow in a sewer not being under pressure pushes and displaces air in the pipe as it flows. That air must go somewhere. It is vented into the atmosphere. It prevents air locks.Quote:
Originally Posted by imohtep56
Mark
Sewer explosions are real. It is not always sewer gas that causes explosions in sewers. It can also be caused by illegal or accidental introduction of other flammable material into the system.
https://en.wikipedia.org/wiki/Louisv...wer_explosions
https://www.history.com/this-day-in-...in-guadalajara
https://www.newsweek.com/180-foot-fo...-video-1976054
https://www.newsflare.com/video/7156...sewer-in-china
https://trenchlesssolutionsusa.com/c...-an-explosion/
Around here sewage flows to the pump stations where it is pumped under high pressure 25 miles away to the treatment plant. There has been cases where contractors have ruptured the pipe causing large spills into Lake Tahoe...
Yup, there are always exceptions. Drainage to the pumping station? That will be gravity fed.Quote:
Originally Posted by IntheGroove
I just noticed the cyrilic writing on the hand rail on the steps. So this is Russia or Ukraine, possibly a few other former Soviet states use Cyillic as well.
Mark
That could as easily be dirt. As for build up of gas, if it's pumped as commented, the pipe is full. No room for gas. If it is a gravity fed drain it is open to the atmosphere via street grates. As long as it is flowing you will have little gas build up. It requires aerobic bacterial digestion to make the gas.Quote:
Originally Posted by imohtep56
Mark
