Pipeline corrosion replacement
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To what percentage of its original thickness must pipeline corrosion thin it out before it needs to be replaced? Is there any standard for this?
Well, it depends on the minimum wall thickness specified in the original pipeline design, I guess? As long as it approaches this thickness, it needs to be replaced. The pipe size is selected through calculation, and then rounded to a common wall thickness value. For corroded pipes, a few millimeters of corrosion margin is also included in the design. So, it can’t be expressed as a percentage, right?
Calculate the theoretical service life by subtracting the minimum allowable wall thickness from the current minimum wall thickness, and then dividing by the corrosion rate