一、前言在石油化工生产中,多数管道和设备需要保温。提高工矿企业管道和设备的保温效率,是一项节约能源的重要措施。我国能源利用率较低,与发达国家相比差距很大.其原因固然很多,管道和设备不保温或保温不佳,是诸因素中的一个重要因素,散热损失是十分惊人的。笔者曾在一个中型企业的化工厂工作过,在能源平衡测定中发现:该厂约有3万米直径 I. Introduction In the petrochemical industry, most pipelines and equipment require insulation. Increasing the insulation efficiency of pipelines and equipment in industrial and mining enterprises is an important measure to save energy. China’s energy utilization rate is relatively low and it is quite different from that of developed countries. There are many reasons for this. Pipelines and equipment are not insulated or poorly insulated. This is an important factor among various factors, and the heat loss is very alarming. The author once worked in a chemical plant of a medium-sized company and found in the energy balance measurement that the plant has a diameter of about 30,000 meters.