Gaskets

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VSGE

I have always wondered if the inner ring of a SW Gasket will cause a disturbance in the flow through a pipe and act like a little orifice. After reading several manufacturer's catalogue and did a field comparison myself, I saw that the inner ring of a gasket shall always sit nicely with the pipe bore diameter.

Is this true for all cases? As I have also come across research paper which says that Inner Ring does obstruct the flow through a pipe.

https://experts.syr.edu/en/publications/estimation-of-head-loss-due-to-flow-intrusion-with-inner-ring-spi
 
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