Pressure relief device for pressurized container

A pressure relief device of domed construction adapted to vent contents of an internally pressurized container upon development of a pre-defined pressure within the container, the pressure relief device comprising:

• a sloped sidewall including an outer annular segment having a predefined thickness and a sloped annular intermediate segment of the same predefined thickness, the sloped annular intermediate segment having a width dimension at least 1.5 times greater than the width dimension of the outer annular segment, and wherein the outer annular segment is shorter and steeper than the annular intermediate segment;
• and
• a circular central plateau intersecting the sloped sidewall to define a concentric flat dome top of the pressure relief device, the circular central plateau having a center point disposed at the center of the pressure relief device and an arc shaped coin line extending through an angle of 95 degrees to 105 degrees about an arc with the apex of the arc positioned at the center point of the circular central plateau and wherein the arc shaped coin line is trapezoidal in transverse cross section with a depth providing a remaining opposing web of material with a thickness of not more than 0.007 inches, wherein the pressure relief device is characterized by a venting pressure of not less than 380 psig and a dome reversal pressure of at least 50 psig greater than the venting pressure.