With China's “cogeneration” development and urban construction needs, buried steam pipes will be the main means of cities central heating in the future .

　　Buried steam pipes generally use the embedded steel sleeve (steel jacket) technology. It is waterproof, leakproof, impermeable, and compressive with a new technology for fully enclosed installation. Its insulating effect and reliability directly relates to the operation of buried steam pipe heat loss, environmental protection and safe operation.

　　Currently, due to technical bottlenecks, the traditional buried steam pipe compensation method can not avoid the “thermal bridges " effect. It leads to big heat loss, external corrosion failure, leaks and explodes easily, and needs regular maintenance or shutdowns, which effect normal operations.

　　Using the rotary compensation method:

　　NO1.There is a large amount of compensation, a layout that accords to the natural terrain and pipe intensity, and the largest group of high pressure self-sealing compensators can make compensations for 500 m length of pipe;

　　NO2.No blind plates are produced by media pressure, there is an adiabatic type internal fixation;

　　NO3.There is excellent sealing, and long-term operation without maintenance;

　　NO4.The method is designed for easy calculation, and can transform pumping ports in any position;

　　NO5.Saving investments and improving security.

　　Cases: Buried steam pipeline engineering for Guangdong Nansha Development Zone, Xuzhou Steel Co., Ltd., Changshu Mei Li Power Co., Ltd., Huai'an Development Zone, Zhejiang Changxing Southeast Electric Power Co.,Ltd., etc.