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Steel Pipe Lifespan for stormwater

Steel Pipe Lifespan for stormwater

Steel Pipe Lifespan for stormwater

(OP)
I am proposing to use a 54" diameter steel pipe as a culvert beneath a railroad.  The municipality has a concern about the life of the steel pipe.  The pipe is to be installed using a jack and bore method, and the pipe will be about 1/2" thick.  What if any concerns will there be of steel pipe in basiclly inert soil conveying stormwater?  There may be some scour concern along the bottom of the pipe.

I am looking for documentation/recommendations that indicate such a pipe is suitable to use as a storm pipe and that it's life can be expected to be 50 - 100 years.  Galvanizing may be used, but it becomes more costly and a bit more difficult to construct when pipe sections need to be welded.

Any information or guidance is greatly appreciated.

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