Tube leakage can result from corrosion.
This can be checked for, or identified, by having the shell side of the cooler circulated while the cooling water is shut off and the end covers removed. Any seepage into the tubes will indicate the leak.
It is also possible to introduce fluorescent dyes into the shell-side liquid: any seepage will show under an ultraviolet light as a bright green glow. Leaking tubes can be temporarily plugged at each end or removed and replaced with a new tube.
This can be checked for, or identified, by having the shell side of the cooler circulated while the cooling water is shut off and the end covers removed. Any seepage into the tubes will indicate the leak.
It is also possible to introduce fluorescent dyes into the shell-side liquid: any seepage will show under an ultraviolet light as a bright green glow. Leaking tubes can be temporarily plugged at each end or removed and replaced with a new tube.
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