EHT and galvanised pipe
EHT and galvanised pipe
(OP)
Hi,
I have a consultant who advises against using EHT (electric heat tracing) on galvanised pipe for firewater purposes on the ground that the localised heating can deteriorate the internal coating, cause clogging & premature corrosion failure of the pipe.
I am unconvinced that the problem is actually so severe that we have move away from using galv. pipe.
Any feedback ?
I have a consultant who advises against using EHT (electric heat tracing) on galvanised pipe for firewater purposes on the ground that the localised heating can deteriorate the internal coating, cause clogging & premature corrosion failure of the pipe.
I am unconvinced that the problem is actually so severe that we have move away from using galv. pipe.
Any feedback ?





RE: EHT and galvanised pipe
Can you also ask the consultant for references to his advice? Perhaps he knows a bit more of your piping conditions than you disclosed us in your post.
Cheers,
gr2vessels
RE: EHT and galvanised pipe
appreciate your feedback.
RE: EHT and galvanised pipe
RE: EHT and galvanised pipe
Beyond that, I'm not exactly sure where the consultant may be coming from, other than I believe there is even a school of thought (I believe some disputed by the galvanizers) that there can actually be a reversal of polarity in the galvanic protection at lesser temperatures in some exposures. Again one could find information on this with a good web search and these keywords. All have a good weekend.