Explosive disc replacement cycle

Explosive disc replacement cycle

Instructions for the use of explosive discs

(1) Blasting discs are precision safety accessories, and it is recommended that they be carefully installed by personnel familiar with the performance of blasting discs.

(2) Discharge to safe areas: Do not install explosive disc devices in areas that endanger personnel safety, consider discharging reactive forces. The installation location should be equipped with safety protection devices and a discharge channel larger than the discharge area of the bursting disc to prevent injury to personnel, equipment, or secondary pressure caused by the bursting disc.

(3) The blasting disc must be installed in the matching clamp.

(4) Please do not reinstall and use the explosive disc removed from the equipment or pipeline.

(6) The normal service life of the bursting disc device is 2-3 years. If the conditions of use are harsh (referring to strong corrosiveness of the medium, large fluctuations in working pressure, or frequent use), the service life is 6 months to 1 year.

Introduction to stress:

Design bursting pressure: The pressure required by the customer or provided by the manufacturer at the same bursting temperature when designing the performance requirements of the bursting disc. It can be expressed as zuixiao or zui maximum value.

Ordinary type bursting disc (arch type): When the system is pressurized to a tensile strength (or tension) exceeding the capacity of the disc material, the bursting disc will open. Ordinary blasting discs are flat or arched, and the direction of the arch is consistent with the direction of the blasting pressure, that is, the blasting pressure acts on the concave surface of the positive arch blasting disc.

Discharge capacity: The ability to discharge fluid after the bursting disc is opened.

Blasting board: A blasting board is a pressure relief device that prevents explosions by releasing pressure when the system is excessively pressurized and about to explode. When the system pressure reaches the 'opening pressure' p value, the bursting plate will instantly open to release pressure.

Metal foil: A metal strip or foil used to manufacture metal explosive discs.

Free flow (discharge) area: the equivalent minimum flow cross-sectional area after excluding the influence of back pressure support and residual components from blasting on the flow area.

IP protection level: It is a sealing protection level that prevents external objects (such as dust, moisture, etc.) from entering the interior of electrical equipment or systems.

Explosive disc replacement cycle

The blasting test of the bursting disc should meet the following requirements:

(1) During hydraulic blasting tests, the pressure chamber of the testing system should be filled with liquid; During the pneumatic blasting test, the testing system must pass the hydraulic test before use, and effective safety protection devices must be installed;

(2) When measuring the blasting pressure, the test blasting temperature should also be measured simultaneously;

(3) During the sampling blasting test of the anti arch blasting disc, the testing system should have sufficient volume to ensure that the blasting disc flips and ruptures.

During the sampling blasting test of the clamping load of the blasting disc, the clamping load of the blasting disc should comply with the provisions of the installation and use instructions.

The user shall determine the working temperature, working pressure, working medium, and other predictable working conditions (including pressure and temperature cycles) under the operating conditions of the bursting disc, and provide them to the manufacturing unit to facilitate the determination of the replacement cycle for the selected structural type of bursting disc. Incorrect installation, incorrect torque (in situations with switches), and mechanical damage may have a direct impact on the burst pressure of the bursting disc, thereby shortening its replacement cycle.

Explosive discs for storage tanks: Due to the large volume of storage tanks, adding explosive discs is also used to isolate safety valves. However, in order to prevent medium explosion caused by fire in the storage tank, large-sized discharge equipment needs to be installed, so an emergency discharge valve needs to be installed instead of a bursting disc. The emergency relief valve has a large size and a low set relief pressure, making it reusable.