5to1baby1in5
Golden Member
- Apr 27, 2001
- 1,250
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Natural gas transportation and delivery pipelines are generally not insulated in cold weather environments either.From my understanding the biggest reason is that a lot of Texas’s power is from natural gas but they never insulated the pipes that transport it. Pipes froze -> no natural gas -> no electricity. Or I guess more accurately, extremely expensive electricity in those cases.
Natural gas (methane) does not freeze.
They just do pigging more often (run a foam barrel through the pipeline to sweep out the water that accumulates in the low spots).
They also do not accept wet natural gas into the pipeline in the first place.
No water = No 'Freezing.'
I bet Texas builds a bunch of natural gas dehydrator skids this summer.
They also inject Methanol into the pipeline to lower the freeze point temperature.
It is due to lack of preventative maintenance and not designing the system for a low enough minimum temperature.
Water lines can be insulated, but if it is too cold for long enough, they will still get cold enough to freeze.
You need to add heat tracing (usually electric, but sometimes steam) under the insulation to keep them warm enough.
That's what probably knocked out the refineries.
