我们锻造车间重油输油管道,一直采用五十年代的老式管道,蒸气管与输油管是平行安装的(见图1)。采用这种形式,存在着一系列的问题。从重油库到主厂房内,干管长三百多米,天暖季节,蒸气压力为2公斤/厘米~2,重油熔化、输送速度还比较快;但到冬 We forged workshop heavy oil pipeline, has been using the 1950s old pipe, steam pipe and pipelines are installed in parallel (see Figure 1). In this form, there are a series of problems. From the heavy oil depot to the main plant, the main pipe is more than 300 meters in length. During the warm days, the steam pressure is 2 kg / cm ~ 2. The heavy oil melts and the conveying speed is still relatively fast. However, in the winter