Rupture disc with selectively positioned initial buckling

Details Rupture disc with selectively positioned initial buckling Rupture disc with selectively positioned initial buckling

1984-04-09

1986-07-01

Shoap, Allan N.

Receptacles

Container attachment or adjunct

Pressure relief means

137 681, F16K 1716, F16K 1740

Patent

active

045975051

ABSTRACT:
A rupture disc system comprises a rupture disc including a dome portion and a flange portion interconnected by a transition region and a mounting mechanism for mounting the rupture disc by the flange portion thereof in a pressure relieving vent. The rupture disc includes a thickness reducing groove at least partially circumferentially surrounding the dome portion and located in the transition region thereof. The rupture disc is of the reverse buckling type and the groove does not completely surround the dome portion so as to define a tab or hinge within that part of the transition region which is ungrooved or not as deeply grooved as a remainder of the transition region. The system includes a support structure for the disc which supports the transition region except in a sector adjacent the dome portion where initial failure is desired. The location of the unsupported sector is approximately centered relative to the tab or hinge. In addition, the disc support structure preferably comprises a downstream ring member having an arcuate projection which extends into the vent. The arcuate projection is located so as to be relatively close to and so as to align with the tab or hinge such that the dome portion wraps about the projection when reverse buckling and rupture occurs.

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