This project was the world’s first large-diameter long-distance heating distribution project adopting a pre-insulated above ground steam piping system. The diameter is DN600 while the
construction length is 8500m with an above ground steam pipeline of 7700m. The entire project was developed and constructed by Wanli Pipeline. Once put into operation, the heat loss was tested and was found to be reduced
by 70% compared to the old system while the temperature drop was reduced 4℃ from 12℃.