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re-rounding rate of the pipe after excavation

re-rounding rate of the pipe after excavation

re-rounding rate of the pipe after excavation

(OP)
The size of an ovality is usually much smaller when it is excavated comparing to what was measured with a caliper pig while the pipe was burried.  I understand it is due to the pressure is reliefed when the dirt is removed.  Does anyone know how much the ovality could rebound and how fast can that happen?

RE: re-rounding rate of the pipe after excavation

If the elastic limit was not exceed "rebound" is immediate and proportional to the amound of load removed.  If the elastic limit was exceeded, never.

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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

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