Control line: used to achieve the control or adjustment of hydraulic components, as well as the detection instrument connected to the pipeline.
控制管路：用来实现液压元件的控制或调节以及与检测仪表相连接的管路。
2
Seal the blind plate and check carefully whether the pipeline is correctly connected and block phenomenon in the pipe before pressure test.
试压前要先封好盲板，认真检查管路是否连接正确，有无管内堵死现象。
3
When more than one boiler is connected to the main steam header, a stop check valve should be installed in the pipeline between each boiler and the header.