on-plot & off-plot piping的中文意思? 在b31.3中对这两个标准有这样的描述: b31.3 process piping: piping typically found in petroleum refineries, chemical, pharmaceutical, textile, **, semiconductor, and cryogenic plants, and related processing plants and terminals; b31.4 pipeline transportation systems for liquid hydrocarbons and other liquids: piping transporting products which are predominately liquid between plants and terminals and within terminals, pumping, regulating, and metering stations; 翻译成中文就是: b31.3 工艺管道:主要为炼油、化工、制药、纺织、造纸、半导体和制冷工厂,以及相关的工艺流程装置和终端[wiki]设备[/wiki]中的管道。 b31.4 液态烃和其它液体的输送管线系统:工厂与终端设备间以及终端设备、泵站、调节站和计量站内输送主要为液体产品的管道 从这你就可以大概判断"on plot"和"off plot"的大概意思了查看更多