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It is usually used on pipelines with large diameters. Usually, the pipeline is kept open at the end of the flange, and if necessary, it is replaced with a blind plate of the same thickness at the other end to cut off the pipeline. Avoid forced expansion of the pipeline due to temporary replacement of other blind plates, affecting the entire system.
The spectacle blind is a kind of pipe parts, mainly for the convenience of maintenance. You can paint the upper half of "8" black to know the specific shape. It's half blind, half iron. It is commonly used for the pipeline flange that needs to change the process. The material mainly includes carbon steel, stainless steel and alloy. It can be selected according to the pipeline pressure grade and pipeline medium.