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1. Is our underground piping system coated?
2. When was our underground carbon steel piping system installed?
3. Is the underground carbon steel piping insulated from above- ground piping?
4. Is underground carbon steel piping system being cathodically protected?
A lubricated plug valve is typically constructed of two pieces of metal, a plug (valve) and a body. The plug sits inside the body but is not in intimate contact. The plug has a hole through the middle and allows flow when the plug is turned so that the hole is oriented with the pipe flow direction downstream. A gas tight seal is created when a special sealant material is typically injected down through the fitting in the center of the valve stem.
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