保温层摩擦力在管道受热膨胀时，能很好的抵消热膨胀力，可以有效地限制管道沿轴向伸长，提高了供热直埋管道的安全性。
Insulation friction in the pipe thermal expansion, well counteract thermal expansion forces can effectively restrict the pipeline along the axial elongation, improved safety Buried heating pipe.
但是奥氏体不锈钢的硬度低、耐磨性差、摩擦系数大；在卤素离子环境下易被腐蚀等弱点限制了它的应用范围。
However, its low hardness and poor wear resistance, as well as a tendency to corroding under the halide ion environment, limit its applications.
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