A fire-safe container includes a polymer polymeric IBC within a metal overpack. The metal overpack includes a manway surrounding a plurality of ports. Each port is on a projection form the polymeric IBC that extends into the manway through an aperture. A collar is disposed in each aperture between the projection of the polymeric IBC and the sides of the aperture such that the port is retained in the manway and preventing the port from contacting or collapsing through the aperture. The manway includes a burst disc to release pressure when there is pressure buildup. One of the ports can provide another burst disc to relieve pressure in the polymeric IBC. The polymeric IBC burst disc can release at a pressure that is greater than the pressure at which the manway burst disc releases.

A rectangular rupture disk comprising sheet metal includes an edge region with which the rupture disk is fastenable to an opening of a container or of a conduit. In the edge region, the rupture disk has a fold-over including a first folded over part of the sheet metal and a second part of the sheet metal to which the first folded over part is parallel or predominantly parallel. The rupture disk further includes a central region with which the opening is sealable until the container or conduit reaches a bursting pressure, and predetermined breaking lines along which the rupture disk ruptures to at least partially open the central region in response to the container or conduit reaching the bursting pressure.

A rectangular rupture disk comprising sheet metal includes an edge region with which the rupture disk is fastenable to an opening of a container or of a conduit. In the edge region, the rupture disk has a fold-over including a first folded over part of the sheet metal and a second part of the sheet metal to which the first folded over part is parallel or predominantly parallel. The rupture disk further includes a central region with which the opening is sealable until the container or conduit reaches a bursting pressure, and predetermined breaking lines along which the rupture disk ruptures to at least partially open the central region in response to the container or conduit reaching the bursting pressure.

A bottle is a bottle formed of synthetic resin materials in a cylindrical shape with a bottom. A bottom wall portion in a bottom portion thereof includes a grounding portion positioned at an outer circumferential edge thereof, a rising circumferential wall portion connected to the grounding portion from an inside of a bottle radial direction and extending upward, a movable wall portion protruding from an upper end part of the rising circumferential wall portion toward the inside of the bottle radial direction, and a recessed circumferential wall portion extending upward from an inner end part in the bottle radial direction of the movable wall portion. The movable wall portion is arranged to be movable upward together with the recessed circumferential wall portion, around a connected portion with the rising circumferential wall portion. A plurality of ribs are arranged in the movable wall portion radially around a bottle axis.

A bottle is a bottle formed of synthetic resin materials in a cylindrical shape with a bottom. A bottom wall portion in a bottom portion thereof includes a grounding portion positioned at an outer circumferential edge thereof, a rising circumferential wall portion connected to the grounding portion from an inside of a bottle radial direction and extending upward, a movable wall portion protruding from an upper end part of the rising circumferential wall portion toward the inside of the bottle radial direction, and a recessed circumferential wall portion extending upward from an inner end part in the bottle radial direction of the movable wall portion. The movable wall portion is arranged to be movable upward together with the recessed circumferential wall portion, around a connected portion with the rising circumferential wall portion. A plurality of ribs are arranged in the movable wall portion radially around a bottle axis.

A bottle includes a bottom wall portion of a bottom portion, grounding portion at an outer circumferential edge, rising circumferential wall portion continuous with grounding portion from the bottle radial inner side, and movable wall portion protrudes from the rising circumferential wall portion upper end. The movable wall portion movable upward around a connected portion to the rising circumferential wall portion. Plurality of ribs are radially disposed around bottle axis on the movable wall portion, and ribs include main recess that is recessed upward, and connection recess. Plurality of main recesses arranged at predetermined intervals in the bottle radial direction, and connection recess connects main recesses, adjacent to each other in the bottle radial direction, in the bottle radial direction together. A depth ratio D2/D1 that is the ratio of a depth (D2) of the connection recess to a depth (D1) of each main recess <2/9 and 1.

A reverse-acting rupture disc (10) having a laser-defined reversal initiation feature (16) is provided in the bulged section (12) of the disc. The reversal initiation feature comprises at least a first lased area (22) that has a reduced thickness relative to rest of the bulged section. A second lased area (24) may also be provided within the margins of the first lased area. The second lased area has a depth that is greater than the depth of the first lased area. A line of weakness (40) may be formed in the bulged section that functions to direct reversal of the bulged section toward a particular area of the disc, such as line-of-opening recess (56).

The disclosure relates to a flameless venting system, along with associated devices and methods. In one aspect, the disclosure is directed to a flameless venting system having a curved flange, which may allow the system to mount directly to the curved surface of a vessel. In another aspect, a disclosed flameless venting system has a curved filter exit. In still another aspect, a disclosed flameless venting system may be configured such that a flame-arresting quenching body component may be joined to a vessel prior to installation of an explosion panel component. In addition, a quenching body component may be configured to provide access to its interior, to facilitate inspection, replacement, or maintenance of an explosion panel contained therein.

The disclosure relates to a flameless venting system, along with associated devices and methods. In one aspect, the disclosure is directed to a flameless venting system having a curved flange, which may allow the system to mount directly to the curved surface of a vessel. In another aspect, a disclosed flameless venting system has a curved filter exit. In still another aspect, a disclosed flameless venting system may be configured such that a flame-arresting quenching body component may be joined to a vessel prior to installation of an explosion panel component. In addition, a quenching body component may be configured to provide access to its interior, to facilitate inspection, replacement, or maintenance of an explosion panel contained therein.