通过管道输送高温或低温流体时要向周围空气散热,所以对管道施行适当的保温措施,规定一定的保温层厚度,以谋求热经济性,就显得十分必要了。另外,在输送低温流体的情况下,若空气中的湿汽凝结在保温层的表面,保温材料就会含有水份,保温效果就会受到损害,所以也必须确定保温层的厚度。 When high-temperature or low-temperature fluids are transported through pipelines, they must dissipate heat to the surrounding air. Therefore, it is necessary to apply proper insulation measures to the pipelines and to specify a certain thickness of insulation layers in order to seek thermal economy. In addition, in the case of transporting a cryogenic fluid, if the moisture in the air condenses on the surface of the insulating layer, the insulating material will contain moisture, and the heat insulating effect will be impaired, so the thickness of the insulating layer must also be determined.