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Ripz (Mechanical) One of two things. Either coating was damaged and you had external corrosion. Or the pH 5 solution being transported is corroding the internals. Both are likely. You'll need to show us pics of the actual failures and perform some visual and thickness inspections...

LittleInch (Petroleum) Can you expand a bit on this coating. I looked it up and came up with a substance used for water proofing pavements! http://www.apoc.com/linedetails.aspx?id=252 Also it is clear that the line was laid and then someone decided to instal a set of foundations directly over...

btrueblood (Mechanical) Is this for a heap leach copper mine? It looks like the supply pipe was buried beneath a membrane/liner - was the supply piping set in a clay layer? No, not around copper mine. Yes, we have a membrane above the line. Yes, the soil property of our area resembles clay...

cvg (Civil/Environmental) well, that's a start water quality is - aggressive/corrosive; temperature? getting this info corrosion protection - non-existent?correct, nothin no exterior coating? nope installation - armor-flex? what about backfill type, quality and compaction and loadings...

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Piping is 18" C.S. STD, wrapped in ArmorFlex, burried 5' in the ground (top of pipe.) Installed in 2005. Water is treated with sulfuric acid and some other chemicals. On the surface, there are a lot of transfer pumps that discharge fluid to the ground. The fluid is water + product. The...

Thanks.

Two holes, 3/4" and 1" within 10' of piping. The water is treated. There is no brace or any other metal near where the holes were. What could cause these holes to form? Any ideas?

Had a 18" cooling water piping repaired; two holes within 10 feet. Is there any regulation/code/standard on how many repairs can be done for ___ feet of piping for underground piping?