Underground Pipe Locating and Inspection
Underground Pipe Locating and Inspection
(OP)
Any recommendations on how to best locate and inspect underground piping? I have been asked to perform a wellness study of a mill water system that sends river water into a plant to cool various machines. The piping is very old and the plant would have to shut down in the event of a failure. There are a couple of valve boxes, but other than that I have several miles of buried pipe. I think it's ductile iron, but I'm not sure. The mains start out at 24" diameter, but reduce down along the way as branches take off. I read about the "pigs' used in oil pipelines, but I don't see how I could use them here. The piping may be as deep as 12'. Any ideas for locating and inspecting would be appreciated.





RE: Underground Pipe Locating and Inspection
If you're really not sure where they are, you could try locating them either via metal detection, or ground penetrating radar.
Have you thought about using an internal remote cable TV inspection?
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RE: Underground Pipe Locating and Inspection
http://www.georentals.co.uk/gpr_main.htm
Without a pig launcher/catcher you wont be able to use pigs. Once you have located the exact pipe course by GPR, if you are able to excavate at regular intervals of about 30 metres metres, you could have guided wave ultrasonics carried out for cracks and wall thickness loss > 5% of cross-sectional area.
Here is a website link:
http://www.guided-ultrasonics.com/index.html
Good luck
Nigel Armstrong
Karachaganak Petroleum
Kazakhstan
RE: Underground Pipe Locating and Inspection
RE: Underground Pipe Locating and Inspection
another GPR and infrared possibility
RE: Underground Pipe Locating and Inspection
RE: Underground Pipe Locating and Inspection
1.2.2 This recommended practice applies to underground storage tank systems (see 1.3.48) that are used to store petroleum products at retail and commercial facilities.
Would you care to elaborate?
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