Safety Technology Exchange Edition: Daily Question (2016.5.21)
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This post was last edited by 68589544 on 2016-5-23 11:01. File: bg10.png. Type: Fill-in-the-blank question. Question: [Fire Safety Technology] Why cannot the oil inlet pipe be connected to the upper part of the oil tank? One of the causes of oil tank fires is static electricity. During transportation, the oil must pass through oil pumps and pipelines to reach the oil tank. Since flow friction within the pump and pipelines generates static electricity, grounding wires are installed on the pump body and pipelines to reduce the accumulation of static electricity, allowing the generated electric charges to be conducted away through the ground. However, the higher the purity of the oil, the better its insulating properties, and it is impossible to drain away all the static electricity generated internally. Therefore, the oil entering the tank already carries a certain amount of static electricity. If the oil inlet pipe is connected at the upper part of the oil tank, when oil with a high flow rate is sprayed out from the pipe in a mist-like form from a higher height to the ground, friction with the air increases the frictional area. The falling oil droplets strike the liquid surface and the tank walls, resulting in a sharp increase in static electricity; the voltage can sometimes reach several thousand volts or even tens of thousands of volts. Coupled with the impurities floating on the oil surface, sharp discharge can easily occur, leading to explosions and fires in the oil tank. Therefore, the oil inlet pipe must not be connected from the upper part of the oil tank.
If the oil inlet pipe is connected to the upper part of the oil tank, when oil flows at a high velocity and sprays out in a misty form from a higher to a lower level, friction with the air increases the area of contact. The falling oil droplets strike the liquid surface and the tank walls, resulting in a sharp increase in static electricity; the voltage can sometimes reach several thousand volts or even tens of thousands of volts. Additionally, impurities floating on the oil surface can easily lead to corona discharge, which may cause the oil tank to explode and catch fire. Therefore, the oil inlet pipe cannot be connected from the top of the oil tank.
When oil is introduced from the upper part of the tank, the oil that sprays out comes into contact with air, generating static electricity. This static electricity, together with the oil and gas, can produce sparks that lead to an explosion and fire in the tank.
If the oil inlet is located on top of the oil tank, static electricity is generated during feeding. The static electricity, together with the vapor produced by the oil, can cause sparks and lead to accidents.
One of the causes of fires in oil tanks is static electricity. If the oil inlet pipe is connected at the upper part of the tank, when oil flows at high speed and sprays out in a misty form from the pipe from a higher to a lower level, friction with the air increases the area of contact. The falling oil droplets strike the liquid surface and the tank walls, resulting in a sharp increase in static charge; the voltage can sometimes reach several thousand volts or even tens of thousands of volts. Furthermore, the impurities floating on the surface of the oil can easily lead to corona discharge, causing the oil tank to explode and catch fire. Therefore, the oil inlet pipe must not be connected from the upper part of the oil tank
If the oil inlet pipe is connected to the upper part of the oil tank, when oil flows at a high velocity and sprays out in a misty form from a higher to a lower level, friction with the air increases the area of contact. The falling oil droplets strike the liquid surface and the tank walls, resulting in a sharp increase in static electricity; the voltage can sometimes reach several thousand volts or even tens of thousands of volts. Additionally, impurities floating on the oil surface can easily lead to corona discharge, which may cause the oil tank to explode and catch fire. Therefore, the oil inlet pipe cannot be connected from the top of the oil tank.
If the oil inlet is located on top of the oil tank, static electricity is generated during feeding. The static electricity, combined with the vapor produced by the oil, can cause sparks, which is extremely dangerous.
If the oil inlet is located on top of the oil tank, static electricity is generated during feeding. The static electricity, combined with the vapor produced by the oil, can cause sparks, which is extremely dangerous.
It is for safety reasons; if the oil inlet pipe is not located at the bottom, the force of the oil flow increases during oil injection, leading to an increased concentration of oil-gas and air mixtures. This can easily reach the explosion limit, and an explosion will occur if a spark is present.
If the oil inlet is located on top of the oil tank, static electricity is generated during feeding. The static electricity, combined with the vapor produced by the oil, can cause sparks, which is extremely dangerous.
One of the causes of fires in oil tanks is static electricity. If the oil inlet pipe is connected at the upper part of the tank, when oil flows at high speed and sprays out in a misty form from the pipe from a higher to a lower level, friction with the air increases the area of contact. The falling oil droplets strike the liquid surface and the tank walls, resulting in a sharp increase in static charge; the voltage can sometimes reach several thousand volts or even tens of thousands of volts. Furthermore, the impurities floating on the surface of the oil can easily lead to corona discharge, causing the oil tank to explode and catch fire. Therefore, the oil inlet pipe must not be connected from the upper part of the oil tank.