By the end of year 2011, more than 2,500-kilometer HTN pre-insulated pipelines have been applied to district heating, which has brought warmth to thousands of families. In order to meet different demands for district heating, HTN provides pipeline products suitable for various methods of pipeline laying, including directly burying, trench installing, and overhead installing. The products are insulated by PUR or Fiberglass according to the temperature of different media. They can be applicable to any pipeline system transmitting hot water and steam bearing pressure at no more than 2.5 MPa and at the temperature lower than 350℃. The production of pipelines conforms to both European and Chinese standards. The products have salient features of low cost of overall construction, short construction period, long lifecycle, energy conservation and environmental protection.