在石油炼制中存在着许多材料问题。自原油开始分馏起,到出厂产品的调配工作上,都遇到各种条件下的材料问题。从温度、压力、物理性质及化学成分来说,这种环境条件量变化很大的。为了安全和经济效益,用制件材料应仔细选择。为了争取计划检修周期间有较长的运转时间,必须正确的选用材料。 There are many material problems in petroleum refining. Since the crude oil began to fractionate, to the deployment of manufactured products, have encountered material problems under various conditions. From the temperature, pressure, physical properties and chemical composition, the environmental conditions vary greatly. For safety and economic benefits, parts should be carefully selected materials. In order to gain a longer running time during planned maintenance cycle, the correct selection of materials must be made.