How to detect and judge internal leakage of safety valve? catalytic device
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How to detect internal leakage of safety valve and determine whether it is leaking? Do you have any general experience?
:Check to see if there is any smell. There is nothing in the gasket. If it can be made airtight: lol
As for safety valve leakage, it depends on the classification of the medium.: 1. For liquid hydrocarbons, under normal circumstances, if there is a slight leakage, it can be seen from the valve body of the safety valve. Especially in summer, it will "sweat" or frost. If the leakage is larger, you can hear the sound or feel the temperature of the medium (most obvious in winter). In addition, under normal circumstances, safety valves for such media are generally connected to low-pressure gas lines. They can also be distinguished from the size or color of the torch flame............. 2. Steam, this is easier to judge due to sound and temperature. In fact, as long as the leakage is not too severe, there is generally no treatment. 3. The oil also feels the temperature. You can analyze it based on the above.
There are warning signs before the safety valve jumps. The most obvious sign is the sound at the scene and the pressure rising. After the valve jumps, the pipeline temperature is obviously higher than normal temperature. For safety reasons, it is best to reset the pressure.
Judgment method: ⒈Listen to the sound to see if there are any unusual noises ； ⒉Check visually, feel and use a thermometer to see if there is any difference in temperature before and after the safety valve. ； ⒊Compare whether there is any change in flow rate before and after the material ； to determine whether the safety valve is leaking.
1. Smooth operation, reduced yield, suspected internal leakage of safety valve ； 2. There is black smoke when the torch burns ； 3. Set the torch to a high liquid level in the condensate tank ； 4. The safety valve and front and rear hand valves have high temperatures ； Frosting of liquid hydrocarbons ； 5. Strengthen daily patrol inspections, listen more, see more, and model more.
1. touch: If the pipeline behind the safety valve is touched by hand and is higher than the ambient temperature, it means there is internal leakage in the safety valve. 2. Listen: Use a stethoscope to listen to the safety valve body or its rear pipeline. If there is internal leakage, it is easy to hear it. ； 3. Temporarily cut off the safety valve and listen again. If there is no sound, it means the safety valve is leaking. 4. Use temperature measuring tools such as a point thermometer to detect the pipeline behind the safety valve. If the temperature is higher than the ambient temperature, it means the safety valve is leaking.
1. Premise: Regularly inspect the safety valve to ensure normal use of the safety valve. 2. After being put into use, determine whether the temperature of the upstream valve and downstream valve of the safety valve has changed. If there is a significant change, it can be determined that the safety valve is leaking. 3. Whether the operation is stable and abnormal, whether the pressure is obviously overpressure, exceeds the fixed pressure (tick-off value) of the safety valve, whether the safety valve returns to its seat, etc.
I learned a lot. In addition, there are multiple safety valves on each tank. We strictly implement the regular inspection system of safety valves. If there is internal leakage, can we tell it from the pressure gauge alone?
If you operate the DCS inside the safety valve, it will definitely alarm you. You can also check the trend and historical records.
The simplest method is to touch the outlet pipeline of the safety valve with your hands. If the temperature is abnormal, you can judge that the safety valve is leaking. We all use this method and it is very effective.
The catalytic safety valve is generally connected to the torch line. If it leaks, the torch will emit black smoke. Also look at the pressure relief line. If the leakage is large, frost will form.
If you suspect internal leakage or ask this question, it means there is a safety hazard. Safety valves should be tested regularly. Regarding internal leakage, generally there is a minimum allowable value during design.
Generally, check whether the torch is smoking and whether you are sweating.
1. If the safety valve is open to the atmosphere, like the one on the air tank, you can only listen to the sound, or close the front and rear valves when you suspect internal leakage! 2. For high-temperature pipelines, you can know whether there is internal leakage by directly touching the pipeline behind the safety valve with your hands. 3. Liquefied gas will frost, which is more obvious.
Select the detection method according to the gas conditions in the equipment. For example, if our company has ammonia and hydrogen, we use wet pH test paper, which is obvious. Or a hydrogen detector, which works very well. It's best to use instruments.
The rear path of the safety valve is usually connected to the low-pressure gas to the torch. If there is any abnormality in the torch flame, it can be easily discovered.
1. For liquid hydrocarbons, under normal circumstances, if there is a slight leakage, it can be seen from the valve body of the safety valve. Especially in summer, it will "sweat" or frost. If the leakage is larger, you can hear the sound or feel the temperature of the medium (most obvious in winter). In addition, under normal circumstances, safety valves for such media are generally connected to low-pressure gas lines. They can also be distinguished from the size or color of the torch flame............. 2. Steam, this is easier to judge due to sound and temperature. In fact, as long as the leakage is not too severe, there is generally no treatment. 3. The oil also feels the temperature.
Isn't it too late when I see the flames of the torch? Is there a faster, simpler and more direct way?
.Safety valve and front and rear hand valves have high temperatures； Frosting of liquid hydrocarbons ； Strengthen daily inspections, listen more, see more, and model more.