Condensate line rehabilitation

Gents

I am looking at a small steam energy centre which sells steam to users around 1 - 2 km away. One of the users about 1 km away has the potential to return around 50% of the condensed steam, which would significantly reduce boiler makeup by around 200TPD. Trouble is the condensate return line is corroded and not really serviceable. It is 100NB which seems rather oversized. To dig out and replace would be very expensive, so I was thinking about shoving a smaller flexible line up the existing one. The condensate is atmospheric so it will be around 85 - 90 deg C. I suppose i could cool the condensate, but it seems wasteful.
I was wondering if any users have done something similar and if so what pipe material they used, how they went about it and if it worked OK.

Thanks

Steve McKenzie Received on Wed Mar 26 01:53:00 2003