The characteristics of polyurethane foam used as insulatinglayer of prefabricated directly buried insulatingpipe are introduced.
介绍了作为预制直埋保温管保温层的聚氨酯泡沫塑料的特性。
2
Findings show that, for be in the wrong frozen soil wrought in favor of thermal disturbance, insulatinglayer thickness respond adopt dam insulatingpipe hull skin temperature 'calculation procedure.
研究结果表明,为不对冻土造成较大热扰动,保温层厚度应采用控制保温管外表面温度的计算方法。
3
The cross sections of the plastic pipe, the heat-insulatinglayer and the aluminum foil are round as optimization, and the heat-insulating layer is made of PE foam materials.