Under what circumstances should a safety bleed down device be installed?

test and air tightness test.

Accordingly take the multiple, multiple, and times the maximum allowable working pressure value, and in the drawing and nameplate.

noted in . 2. When a venting device is installed on the container, the operating pressure of the venting device should not be greater than the design pressure, and the overpressure limit of the space should not be greater than 10% of the design pressure or the greater value of 20kpa. 3. When a plurality of relief devices are installed on the container, the operating pressure of one of the relief devices should not be greater than the design pressure, and the operating pressure of the other relief devices can be increased, but not 4% of the overpressure design.

The overpressure limit of this space should not be greater than 12% of the design pressure or the greater of 30kPa. 4. When the container may encounter fire or be close to an unforeseen external heat source and may cause danger, an auxiliary relief device should be installed, and the overpressure limit in the container should not exceed 16% of the design pressure. 5 In any of the following cases, it can be regarded as a container, and only a venting device needs to be installed in a dangerous space (container or pipe).

However, when calculating the amount of venting a vent, the connecting pipes between the vessels should be included. When a pressure vessel connected to a pressure source that does not generate pressure itself reaches the design pressure of the pressure source. Focus on solving the best air conditioning automatic control and heating automatic control schemes; When the design pressure of all pressure vessels is the same or slightly different, and the vessels are connected by a large enough pipe, and there is no valve partition in the middle.

6. When the same pressure vessel has more than two design pressures due to several working conditions, the operating pressure of the vessel relief device should be able to apply to the design pressure under various working conditions. 7. The pressure in the container, if possible, is less than the atmospheric pressure.

When the container cannot withstand this negative pressure condition, an anti-negative pressure relief device should be installed. 8. If the high-temperature medium may leak into the low-temperature medium and generate steam in the pressure vessel such as the heat exchanger, a discharge device should be set up in the low-temperature space. 9 Generally, any type of bleed device can be chosen, but if one of the following conditions is met, a rupture disc device must be used.

Rapid growth in stress; There are higher requirements for sealing; The contents of the container will lead to a safety valve.

Lapse; Other situations where the safety valve cannot be applied. <>

If one of the following conditions is met, a safety venting device should be installed: (1) the design pressure is less than the pressure of the external pressure source, and the outlet may be shut down or blocked by the equipment and pipeline system. (2) Outlet pipes for positive displacement pumps and compressors that may be shut down.

3) The vapor phase piping system at the top of the distillation column caused by overpressure due to the interruption of cooling water or reflux and excessive heat input. (4) Equipment and piping systems with overpressure due to non-condensable gas accumulation. (5) The upstream pipeline of the shut-off valve or regulating valve in the outlet pipeline of the heating furnace.

6) Pipeline system with thermal expansion or vaporization due to the closure of the shut-off valves at both ends, affected by ambient temperature, sunlight radiation or heat tracing. (7) The piping system upstream of the shut-off valve at the outlet of the reactor where the exothermic reaction may get out of control. (8) Steam outlet pipeline of condensing steam turbine.

9) Outlet pipe for low boiling liquid containers. (10) The outlet pipe on the low-pressure side of the heat exchanger that may be ruptured. Other areas that the designer believes may be producing overpressure.

The safety relief device is an attachment installed on the vessel to ensure the safe operation of the pressure vessel, automatically relieve the pressure when overpressure, and prevent overpressure from occurring, and is one of the safety accessories of the pressure vessel. It mainly includes safety valves, rupture discs and their combination devices, explosion vents and pressure regulation venting valves. The safety venting device is a device that opens the inlet static pressure action to vent the fluid in the case of non-fire or fire accident to prevent the pressure in the system from exceeding the predetermined safety value.

The safety bleed device includes a safety valve and a rupture disc device. The safety valve plays a role in the safety protection of the system. When the system pressure exceeds the specified value, the safety valve is opened, and a part of the gas and fluid in the system is discharged into the atmosphere outside the pipeline, so that the system pressure does not exceed the allowable value, so as to ensure that the system does not cause accidents due to excessive pressure.

Summary. Dear, I am glad to answer for you: under what circumstances should a safety venting device be installed?

Answer: The pressure ** is higher than or may be higher than the container of the container with high allowable working pressure. Due to physical or chemical changes in the working medium, the internal pressure of the container may exceed the high allowable working pressure of the container.

On containers containing compressed or liquefied gases. During the heating evaporation and heat exchange process, the pressure may exceed the high allowable working pressure of the container. Fluid hydraulic equipment where the pressure may exceed the high allowable working pressure.

Dear, I am glad to train you to untie the chain and answer: under what circumstances should a safety venting device be set up? Answer:

The pressure ** is higher than or is likely to be higher than the permissible working pressure of the eggplant in the container shed. Due to physical or chemical changes in the working medium, the internal pressure of the container may exceed the high allowable working pressure of the container. On containers containing compressed or liquefied gases.

During the heating evaporation and heat exchange process, the pressure may exceed the high allowable working pressure of the container. Fluid hydraulic equipment where the pressure may exceed the high allowable working pressure. Thank you for your patience if you are satisfied with my service, please give a thumbs up, and I wish you all the best, peace and joy again.

I know this, if the atmospheric pressure vessel has a manhole cover (not sealed), do you need to design a safety relief device?

Kisses that are needed.

Hello, I am glad to serve you and give you the following answers: the safety venting system is an important part of safety technology, and it is used to prevent fires, ** and other dangerous events. It consists of a control system, a detection system, a spraying system and a monitoring system, among others.

The control system is used to control the start and stop of the safety bleed system, as well as to monitor the operating status of the system. The detection system is used to detect dangerous gases, and when the gas exceeds the standard, the detection system will automatically activate the safety venting system to prevent hazards. Injection systems are used to inject safety gases into hazardous environments to prevent hazards from occurring.

The monitoring system is used to monitor the operation of the safety venting system and to detect the concentration of hazardous gases in the environment. Causes of the problem: 1. The control system fails, resulting in the inability to start the safety venting system.

2. The detection system fails, resulting in the inability to detect dangerous gases, so that the safety venting system cannot be started in time. 3. The injection system fails, resulting in the inability to inject safety gas into the hazardous environment. 4. The failure of the monitoring system leads to the inability to monitor the operation of the safe cleaning and discharge system, as well as the inability to detect the concentration of dangerous gases in the environment.

Solution and practice steps: 1. Conduct regular maintenance and inspection of the control system, detection system, injection system and monitoring system in the safety discharge system to ensure the normal operation of the safety discharge system. 2. Regularly check the detection system in the safety discharge system to ensure the detection accuracy and timeliness.

The safety venting system is usually composed of the following parts: 1. Vent detector: used to detect the substances released when the safety venting event occurs; 2. Vent detector:

It is used to actively identify the position of artillery firing by means of firearm, phonon or radar signals; 3. Discharge controller: used to grasp the situation of safe discharge according to the test results, attack and control it; 4. Alarm: used to send early warning signals to nearby dangerous areas for timely response; 5. Nuclear ** Protector:

It is used to take effective protective measures in the event of nuclear **; 6. Fire extinguishing device: used to suppress the fire in time to reduce the spread of fire.

Answer]: A, Huaizhi Zen B, C

This lead dust question examines the safety technology of gas cylinders. At present, there are four commonly used safety pressure relief devices: fusible plug alloy device, rupture disc device, safety lap valve and rupture disc-fusible plug composite device.

Answer]: C This question examines the Dan file hole as a safety pressure relief device. Option C is wrong, when the pressure in the container exceeds the specified mold, it can automatically discharge the high-pressure medium inside the container.

Answer]: C According to the "Code for Fire Protection Design of Buildings" GB 50016-2014 (2018 Edition) 3 6 3, pressure relief facilities should be made of light posture roof panels, lightweight walls and easy to relieve pressure doors, windows, etc., and safety glass should be used to produce sharp fragments of quiet chain bucket materials; The setting of pressure relief facilities should avoid crowded places and main traffic roads, and should be close to the most dangerous parts of the grinding; Pressure relief facilities on rooftops should be protected from ice and snow accumulation. The answer to this question is C.