Why is it forbidden to use mobile phones at gas stations?

When many friends drive to the gas station to refuel, they often find the slogan "No cell phones". Although many people know that hitting someone at a gas station may cause an explosion, many people are full of doubts about this regulation because there are no relevant cases in real life. Why can't gas stations use mobile phones?

As early as July 23, 2002, Henan Daily reported that a gas station in Zhengzhou, Henan Province was exploded by a driver using a mobile phone at the gas station. Mobile phone is a radio communication tool. Radio waves (radio frequency electromagnetic radiation) emitted by radio transmitter can induce radio frequency current in the antenna receiving radio. When RF current circulates between metal conductors, if corrosion or poor contact occurs, RF sparks will occur. As long as the duration of RF spark exceeds 1 microsecond and the energy exceeds 6 MW, the mixture of methane and air will be ignited. Because gasoline is a volatile substance, in the flammable gas danger zone formed by the leakage of oil and gas tanks and natural gas pipelines, the radio frequency sparks generated by mobile phones can easily lead to explosions and disasters. The mobile phone itself does not have explosion-proof function. When a gas station injects gasoline into the fuel tank of a car or motorcycle through an oil gun, the oil and gas in the original empty fuel tank drifts outward, and the newly injected gasoline also volatilizes into the air, so that the oil and gas density around the refueling vehicle suddenly increases. At the same time, in order to make the communication signal clearer, people use mobile phones with high frequency and strong transmission power, which meet the national standards, but also pose a serious threat to gas filling stations; Because computer control is widely used in refueling stations now, high-intensity mobile phone signals will be induced by computer equipment, and the instantaneous electronic friction between them may ignite fuel vapor and cause an explosion. The current required to ignite the gas is very small, and the electrostatic current generated by the mobile phone in the working state can completely reach this limit. If you encounter cloudy or foggy weather with high air humidity and low air pressure when picking up and unloading oil products at refueling and filling stations, the density of oil and gas will increase accordingly due to poor air circulation, and the possibility of explosion caused by picking up mobile phones will further increase.

However, according to the news released by the Wireless Electromagnetic Induction Research Center of the University of Oklahoma (funded by the London Petroleum Institute) at a recent scientific and technological seminar, it is known that cell phones at gas stations will not cause fires. Dr Glenn Krieger, deputy director of the center, said: "Our research is consistent with the research results of other scientists at this meeting, pointing out that this danger of mobile phones does not exist, and there is no reliable evidence to prove that this possibility exists. Many online reports about fires caused by gas stations are misinformed, and there is no typical case. In the instruction manual, mobile phone manufacturers advise people not to use mobile phones at gas stations, which is implemented according to some outdated national regulations. At that time, these regulations were formulated according to the mobile phone power of 20 watts. In fact, the current mobile phone power is only about 0.6 watts.

Judging from the current situation, it is not clear whether gas stations can use mobile phones, and it is not uncommon for gas stations to use mobile phones. Before we have a definite conclusion, take precautions and don't use mobile phones at gas stations!