A vent will always create a weak spot, but the round version has no corners for stress concentration and structural weakness. In the event of an explosion, the vent fabric accepts the load and transfers it uniformly around the ring's circumference. The circularshape makes predicting the load goingto each of the fasteners possible. If it were rectangular, the pressure going to each fastener could be different and thus more difficult to estimate. With a defined amount of required surface area, Dome Technology's team sizes the explosion vents and places them in locations where they will vent adequately and function structurally.
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