Flange selection issue
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Our current pipeline design pressure is 4 MPa. Since the flanges were purchased incorrectly at the time, can two concave flanges be used in combination? :'(
No, the sealing pressure does not reach the required level
What standards are used in the design? What is a medium? What’s the temperature?
The depth of the groove on the sealing surface is 4 mm; when two such grooves are used together, the total depth is 8 mm. If a metal wound gasket is used, its thickness is only 3.2 mm, which is equivalent to having two steel plates pressed together – with no sealing effect at all
What if those three gaskets are used together?
No, it’s not possible to use two concave surfaces at 4 MPa
That idea of yours is very dangerous; it’s better to change it
4Mpa is indeed very dangerous. . . . :lol
Go back where you came from; change it. Otherwise, 4MPA is too dangerous
Neither of the two gaskets will do; you need three instead: L
With such high pressures, the flanges that should be used are high-neck male and female flanges (flanges with male and female threads). The concave flange you mentioned is just half of a pair of flanges; what’s needed is a concave flange plate paired with a convex flange plate, and the gasket should be a metal-wound gasket (or one with an internal steel ring).