If you have ever driven down Pa. 837 you would notice very large green painted exposed industrial pipes from Munhall all the way down to Jefferson Hills .
But what are they for ? lots of rumors and story's I have heard but their is a logical explanation
and it makes perfect sense and saves United States Steel and helps save environment in long run.
The pipes run from the USS Clairiton Coke Works to Irvin works to Edgar Thompson Works. at one time it also served Homestead and Duquesne works when they existed.
The pipes carry Combustible Coking Gas which is produced when coal is heated in the process of making coke .
You can also see smaller Nitrogen and Oxygen pipes in places as well which run between the plants
This coke gas is a valuable Byproduct of Coke Making and is used at Irwin and ET to heat the blast furnaces .
Which cuts down the amount of natural gas to fire the furnaces. .
The pipes are not as expansive and prominent as they once where when they where still feeding Homestead but are still plainly visible as you ride down Pa.837
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