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May 26, 2020
First of all, the oil loading equipment does not meet the specifications, equipment failure, oil leakage, electrostatic discharge and human misuse are the main reasons for the fuel tanker fire. According to the experience and lessons, the following aspects should be taken into consideration to ensure the safety of oil filling in aluminum tanker trailers.
Static grounding cannot be ignored. From the perspective of diesel fuel tanker trailer, the main parts of static electricity are pumps, filters and pipes. The static electricity generated by the tanker filling system is much higher than that of the ground pipeline. Relevant information reflects: If a 250m long and 100mm diameter underground pipe is used to pump oil at a flow rate of 2500L / min, the charge from the fuel gun is generally only a few degrees, but after passing through the tanker, the charge is exceeded. These Static electricity is mainly generated by the filter of the tank truck, so if the tank truck is not grounded and the loading and unloading operation is carried out, the tank body can carry a voltage of more than 10kV;
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① Connect the ground wire before filling the oil, and often check its intact condition. We also need to pay attention to whether the grounding resistance meets the anti-static standard.
②The crane pipe must reach the bottom of the petrol tanker trailer when filling oil, the pipe mouth should be kept at about 15cm from the bottom of the tank, and the initial filling speed should be strictly controlled within 1m/s, until the oil outlet is submerged, then gradually increase the flow rate, but The maximum flow velocity should not exceed 4.5m / s to prevent electrostatic accidents caused by spraying;
③After the oil filling is completed, the ground must be disconnected after 5 minutes of oil stabilization. Because after the oil is installed, the oil surface potential will remain for several minutes because the oil flows in the tank.
Don't relax your vigilance because of good grounding. Electrostatic grounding can only conduct static electricity on "conductors" (metals, human bodies, conductive liquids, etc.) that are closely connected to it. Static charge is helpless or difficult to remove in a short time;
Therefore, while electrostatically grounding, the operator should strictly follow the operating procedures and pay attention to the hidden dangers that may arise at any time, and at the same time master the emergency methods and rescue measures for correctly handling various emergencies.
Prevent people from being charged. During loading and unloading operations, the human body must be in contact with work objects and work objects to produce friction, which is very easy to generate static electricity and may form electrostatic discharge.
An explosion will occur. The operator must wear anti-static work clothes and anti-static shoes during the operation, the purpose of which is to ground the human body. In addition, the shoes worn should be thin nylon socks or other conductive socks. It is strictly prohibited to paste insulating film on the antistatic soles, and regular inspections should be made.
Equipment that meets technical specifications and safety requirements must be used. The automatic control, remote control, measuring instruments, valves and other equipment of the oil delivery station must be regularly inspected and calibrated, and related management systems should be formulated, especially the material of the oil delivery equipment cannot be underestimated. It is strictly forbidden to use non-conductive polyethylene hoses as oil pipelines for oil delivery crane pipes, and it is strictly forbidden to use plastic containers when handling oil products. The above are the most basic safety common sense
At the same time, the static grounding device can not be made up, and it is necessary to strictly follow the specifications, install it carefully, and check it regularly. For the current commonly used clamps and magnetic joints to be grounded, they should not be randomly clamped or adsorbed on any part of the diesel tanker trailer for sale, even on the painted surface. This is extremely detrimental to anti-static, but also a big hidden danger.
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