A multiple-dome, scored rupture disc presentsopposing first and second disc faces, and is providedwith a circular, central region and a flat annularflange surrounding the central region. An arcuate lineof weakness is formed in the disc circumscribing thecentral area except for a portion of the circumferenceof the central area defining a hinge about which thecentral region pivots upon rupture. The central regionis divided by a diametrical ridge into two side-by-sidesemicircular halves within which the disc is bulged toform a plurality of separate concavo-convex bulges inthe body.
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