After pure benzene pipeline is heated, the flange leaks oil
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After the pure benzene pipeline is heated, oil leakage occurs in the flow meter flange of the loading crane tube. At this time, the pump outlet valve and the loading crane tube valve are closed. Is it caused by heating expansion? What should I do? If the pump outlet valve is open, but there is a check valve at the outlet, it is really urgent! ! ! Please give me some advice...:handshake :handshake This post was last edited by aymzj on 2009-4-19 08:39 ]
Not necessarily, you didn't consider the expansion of the heated pipes? ? It may also be caused by the quality of the installation and no test run? ? Safety management should be strengthened during maintenance! ! ! ! :handshake:victory:
Is the pressure not released? It is recommended to find a pressure relief point and try again.
After the pipeline is installed, it has passed the pressure test and the air tightness test, and there is no problem! Is it a design problem? urgent! ! !
It is basically certain that it is caused by the lack of pressure relief in the loading line. After the pipeline heating is turned on, the pure benzene in the pipeline expands due to heat. Due to the incompressibility of the liquid and the lack of pressure relief, the pressure in the pipeline is extremely high, leading to leakage. You can lead a small jumper line behind the pump outlet check valve to the pump inlet, add a valve across the line, and when the loading pipeline is stationary, use the small jumper line - the pump inlet line - the storage tank to relieve the pressure.
This is normal. It expands due to heat. The flange connection is the weakest point in the pipeline, so it is easy to choke. In addition, this situation may occur if the air sealing inspection is not in place, the bolts are not tightened according to standards, and there are problems with the gasket medium.
According to the opinion of the 6th floor, the problem has been solved, thank you all upstairs:handshake:victory: