How to add blind plates between concave and convex flanges? ?
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Asking for a master: How to add blind plates between concave and convex flanges? ? Is it possible to use ordinary tablet blindness?
Are there any temporary blind plates added for pressure testing of process pipelines? Are there any temporary blind plates with concave and convex surfaces?
If the pressure requirements are not too strict, you can add two more gaskets and replace them with flat ones.
When used together, it will be bad if the flange surface seal is damaged.
The pipeline test pressure is 1.5 times the working pressure. The pressure is still quite high. The concave and convex surfaces are both above 4 MPa. If a flat blind plate is used, the convex surface gasket is still prone to problems because it has no outer ring. It is best to use a concave and convex blind plate.
What do you do with the weird convex and concave flange without adding an inner wrapping pad and a blind plate? Is the poster talking about adding plugboards?
Take a look at this, HGT21547-1993 Steel insert plates, gasket rings, and figure 8 blind plates for pipes
I just used it some time ago. The blind plate has concave and convex surfaces. It can also be customized. The carbon steel one is used for pressure testing, which is economical and convenient.