Posted by oldtanker on January 23, 2019 at 06:06:51 from (66.228.255.59):
In Reply to: Pipeline-- posted by big tee on January 22, 2019 at 06:57:33:
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Mark, it seems that the companies maintaining lines that transport petroleum liquid products from crude oil to the finished product are in fact very careful about how those lines. Here in the US though natural gas lines seem to be the problem. Seems that even the gas companies are admitting that the infrastructure for NG is dismal and some lines are over 100 years old. Lot of that stuff was put in so long ago that they are not even sure where the lines are.
Heck they laid NG line into a town near me a couple of years ago. It appeared that it was about a 6 or 8 inch line and it was flexible. The problem is that it's only in about 4'. We can get frost several feet below that so the line is subject to frost heave. In a 16 mile run they have had to dig that line up and repair it several times. And it's not even 5 years old yet. I'm sure they only put it in about 4 feet because they used a cable plow pulled by a crawler. Much faster and cheaper than digging it in.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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