Posted by Tony Conner on December 03, 2001 at 10:22:39:
In Reply to: copper steam lines? posted by jim on December 03, 2001 at 07:21:15:
Steam lines won't rust internally unless they out of service for a period of time, with condensate left in them. A properly designed system should be self draining. I would use steel pipe, rather than copper. Copper expands much more than steel for the same temperature increase, and if nothing else the material will be much more expensive.
Water treatment is primarily for the protection of the boiler, with some regard for the return lines. If the steam is being used for humidification, there will be no return lines to worry about. Carryover is the only way boiler chemicals can show up in steam lines.
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