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如果外部腐蚀是地下热力管道损坏的基本原因,那么,采用比较完善的、坚固耐久的防腐保护是提高地下热力管道可靠性的基本方法。地沟敷设是消极的防腐方法(管道外表的防腐层),无沟敷设虽属消极的,但却有积极的防腐方法(如用电力排水、阴极保护等)。目前地下热力管道最可靠的防腐保护是用感应加热方法,将64/64和105牌号硅酸搪瓷涂在管子上(渣层和两层搪瓷层),並用两层热特性稳定,温度一样低的
If the external corrosion is the basic reason for the damage of the underground thermal pipeline, then the use of a more comprehensive, robust and durable corrosion protection is the basic method to improve the reliability of the underground thermal pipeline. The laying of the trench is a negative anticorrosion method (the anticorrosion layer on the outside of the pipeline). Although the trenchless laying is negative, there are active anti-corrosion methods (such as power drainage, cathodic protection, etc.). At present, the most reliable anticorrosion protection for underground thermal pipelines is to apply 64/64 and 105 grade silicate silicates to the pipe (slag layer and two layers of enamel layers) by induction heating, and use two layers of thermal characteristics to stabilize the temperature as low as possible.