MA fire marshal says overpressure is the cause. Columbia Gas says cause is “unclear”

I live in a natural gas free neighborhood.

How is pressure regulated? I know that the feed lines have higher pressure, but are there regulators on each home's meter? Can a main line over-pressure make it into the house?

RMD

3 houses have blown up and nearly 80 fires. Power shutoff to prevent ignition and tens of thousands evacuated until houses can be checked one by one to make sure the gas can safely be turned back on.

1 killed, scores injured. Going to take a while to sort this out.

Philly is literally a time bomb right now with 100 year old gas mains all over the city.

The stupid, corrupt Democrats who've run this city into the ground in the past 70 years of Democrat-only control had a chance to sell the city-owned and run Philadelphia Gas Works (PGW) to a private firm which offered to replace ALL the city infrastructure with new piping and mains, but they passed on it.

It's only a matter of time before whole blocks start blowing up real good there.

quote:

Originally posted by rduckwor:
I live in a natural gas free neighborhood.

How is pressure regulated? I know that the feed lines have higher pressure, but are there regulators on each home's meter? Can a main line over-pressure make it into the house?

RMD

A typical residential gas meter uses a vent to protect from overpressure. That vent has to be piped to open air if the meter is in an interior space.

If that vent isnt installed correctly, or fails..

I'm sure there is both human error and equipment failure involved in this, time will tell.