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danw2 rorschach hit the nail on the head. It could be a case of SRB (sulfate reducing bacteria) attack, Desulfovibrio desulfuricans. I have seen cases of this attack in oil well casings, sucker rods and some cooling water systems contaminated by small amounts of crude oil. It is seen as a a...

I have to agree with JedC as plastics will last longer than most metals used for potable water. If you select plastic, be certain to select a plastic that is approved for potable water use. A lot will depend on the size of the piping and thickness of plastic to be used, is it going to be...

Delta; Found what I looked for, very surprising! It's just a simple spread sheet showing # of hydrated lime and Magox to be used with a varying alkalinty and Mg content of the raw water. You just type in the numbers and the spread sheet calculates the chemical requirements. I also included...

I made such a spread sheet years ago on Lotus 123. It was based on use of a series of deep wells with varying water composition. Since the well operation was changed only infrequently, the spread sheet worked fine. It included use of MgO for silica removal along with hydrated lime. The natural...

Agree with EdStainless, keep the tube plug material the same as the tubes. If you are experiencing internal tube corrosion, you may need to investigate injection of an inhibitor(s), neutralizing and/or filming.

Carbon steel used for heat excahngers is very susceptable to standby corrosion and pitting when new or following use. When excahangers or coolers are fabricated in a shop they are usually hydrotested with water of whatever quality is available then drained. Corrosion will begin at this time. If...