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Posted by Biagi on May 03, 2002 at 16:18:23:
In Reply to: copper steam lines? posted by jim on December 03, 2001 at 07:21:15:
: I am looking for advice on the use of copper tube/pipe for steam lines. The system pressure is 15PSIG and the system load is 100hp. The steam is being used for process humidification, direct injection.The system load profile is similiar to normal humidifier. The boiler feedwater is softned but no corrision inhibitors can be added due to process requirements. I am afraid carbon steel will rust quickly and want to avoid using stainless. I am looking to use copper lines with bronze valves with the appropriate trim. Would appreciate any help such as sizing tables for copper lines, material specifications, brazing material, and just general advice.
General advice is: don't do it if the upstream pressure is above 15 PSI at the boiler or anywhere else that may be tied tot his system. If any point fails, you'll have the higher pressure on the copper system. You don't want that no matter how you install it or how it's soldered in. It's just not good practice to use copper on steam lines in any manner or for any reason. Steel pipe is the only logical way to go. As the other respondents have already suggested, lay system out right, trap it properly, and you won't have a problem.