For long runs of process and main utilities, liquid filled piping (containing hydrocarbons of C3 and lighter )could be isolated at both ends whilst the plant is in normal operation.
英
美
- 工艺和主要公用工程长期运行时,在正常操作状态,充满液体(含C3烃类和轻组分)的管道可在两端隔离。