Pre-Insulated Pipe for District Heat Distribution System

Hi, i am student at a korean university. My teacher asks me to find papers, books, journals or anny proven kind of document about pre-insulated pipe.

I think it shud contain: structures, material, calculation, simulation,...

I have searched very hard but cant find much. So I hope you are seniors can help me .

pls pm me here

Thanks very much in advanced!

CR4 Admin - email address removed

From the CR4 Rules: Do not post phone numbers or email addresses. The CR4 Admin will delete all phone numbers and email addresses posted in threads or comments. You can share this information via the CR4 internal messaging system.