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2. Pipe plug - Wikipedia

   en.wikipedia.org/wiki/Pipe_plug

   Pipe plugs provide a trench-less method for the maintenance of drains and sewers, and construction and testing of non-pressurized gravity pipelines. There are three main purposes of pipe plugs. These are temporary sealing or stopping the fluid flow in a pipeline, leak testing and by-passing the flow.

3. Deep freeze breaks pipes, creates water crisis across South - AOL

   www.aol.com/weather/deep-freeze-breaks-pipes...

   More than 400 customers reported burst pipes, so between unreported leaks, closed businesses and empty vacation homes, the system figures thousands of leaky pipes are gushing water.

4. How to Fix Your Frozen Pipes, According to Experts - AOL

   www.aol.com/keep-pipes-freezing-winter-according...

   Pipes near exterior walls or foundation: These are most susceptible to freezing. Exposed pipes in crawl spaces or attics : Lack of insulation increases their vulnerability.

5. Efforts to stem the Deepwater Horizon oil spill - Wikipedia

   en.wikipedia.org/wiki/Efforts_to_stem_the...

   [7] [8] The second technique, placing a 125-tonne (276,000 lb) containment dome (which had worked on leaks in shallower water) over the largest leak and piping the oil to a storage vessel on the surface, failed when gas leaking from the pipe combined with cold water formed methane hydrate crystals that blocked the opening at the top of the dome ...

6. Hydrostatic test - Wikipedia

   en.wikipedia.org/wiki/Hydrostatic_test

   The test involves filling the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection, and pressurization of the vessel to the specified test pressure. Pressure tightness can be tested by shutting off the supply valve and observing whether there is a pressure loss.

7. Leak detection - Wikipedia

   en.wikipedia.org/wiki/Leak_detection

   A leak appearing within an analytic region (a rule added to the camera) is immediately analyzed for its attributes, including thermal temperature, size, and behaviour (e.g. spraying, pooling, spilling). When a leak is determined to be valid based on set parameters, an alarm notification with leak video is generated and sent to a monitoring station.