Issue of installing blind plates on concave flanges
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As shown in the diagram: a blind plate is installed on the concave flange. Why is the installation shown in the second diagram incorrect? What’s wrong with it? If anyone knows, please let me know. Thank you
I get it now; the original poster is asking about the mistakes in installing a blind plate on this concave flange, right? The core issues actually lie in sealing and positioning: the concave flange comes with a concave sealing groove, and when the gasket is installed correctly, it fits perfectly inside this groove, allowing it to be evenly compressed by the two flange surfaces, thereby ensuring an effective seal. During incorrect installation, the gasket was not placed in the groove at all; it was simply placed randomly in the middle of the flange, with the blind plate pressed right against it. As a result, the gasket is prone to shifting and thus fails to provide proper sealing. Moreover, the force is not distributed evenly across the flange, which can lead to leaks and accelerate wear of the sealing surfaces. If installation is to be done on-site, it’s best to select the appropriate gasket first by checking the dimensions of the flange’s sealing groove. When installing, make sure to place the gasket precisely into the groove before tightening the blind flange bolts – this will ensure better security
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